28 Jan 2022: Hioki Upgrades 4 Clamp Meters For High Voltage Measurement Suitable For Safe Inspection of Solar Installations

Hioki Upgrades 4 Clamp Meters For High Voltage Measurement Suitable For Safe Inspection of Solar Installations

Hioki Singapore is pleased to announce the upgrade and release of 4 new clamp meters for high voltage measurement. These 4 improved clamp meters are :

AC/DC Clamp Meter CM4371-50
AC/DC Clamp Meter CM4373-50
AC/DC Clamp Meter CM4375-50
AC Clamp Meter CM4141-50

The new improved version will now be compatible with the DC High Voltage Probe P2000 and Wireless Adapter Z3210 to boost work efficiency.

Development Background

With the global movement to realize a carbon-free society, solar power generation systems are drawing attention. In addition, development in solar power generation and EV batteries have been accelerating further due to recent rising demand for electric power.

However, higher voltages in these equipment increase the risk to engineers during maintenance. The international safety standards IEC61010 classifies safety-level standards as CAT II to IV depending on the location of use. By using measuring instruments that meet the respective measurement categories, serious accidents such as electric shock and damage are prevented.

Recently, IEC re-evaluated the safety standards associated with higher voltages. In this re-evaluation, measurements of solar power generation facilities were reclassified into CAT III from their previous CAT II. This means that measuring instruments have been globally recognized as needing much more stringent safety features than before.


1. World's first CAT III 2,000 V measurement probe

There is a global trend for solar systems to handle larger and larger voltages. While 1500 V systems are increasingly popular in facilities today, increasing efficiency and scale in the future will lead to even higher voltages. This means that measuring instruments will eventually need to handle voltages of much more than the current 1500 V.

In anticipation of such a near future, the P2000 was created as a high-voltage probe that can measure 2,000 V DC in CAT Ⅲ to prevent electric shock to workers and burnout of equipment.

In order for the P2000 to help withstand high voltages, it actually reduces the voltage at a set ratio, then sends it to the measuring instrument. However this would also decrease the values on the measuring instrument, if not for a special function on the instrument. The four improved Clamp Meters compatible with P2000  have the “DC HIGH V PROBE mode” that compensates for this output ratio difference to save the engineer the trouble of calculating. The digital multimeter DT4261 released in August 2021 also has the same function.


2. Wireless communication capability for even greater convenience

Wireless support

When the Wireless Adapter Z3210 is installed, Bluetooth® wireless communication is enabled. It transfers measurements to your smartphone or tablet and allows you to quickly create reports with field photos and drawings.

See details about Wireless Adapter Z3210


Excel® Direct Input Function (*1)

Boost work efficiency in the field by letting you directly transfer measurement data to (i.e., enter measured values directly into) templates created as Excel®.

*1:The optional Wireless Adapter Z3210 is required.


3. Helping personnel analyze issues in the field

Harmonic measurement

When combined with GENNECT Cross (*2), you can perform simple harmonic analysis. Applications include problem analysis of power supply systems.

See here for details about GENNECT Cross

Problems that can be caused by harmonics

1. Equipment burn-out and destruction due to overheating

2. Malfunctions of power control devices

3. Increased loss along with reduced service life and efficiency for power devices

*2:GENNECT Cross is an free app that lets you connect field measuring instruments to smartphones and tablets using Bluetooth® communications. Wireless Adapter Z3210 (sold separately) is required in order to pair the instrument with GENNECT Cross.

4. Convenient for repeated measurement and recording tasks!

Automatic hold function

In addition to being convenient when the display cannot be seen during measurement, when the measurement value is stabilized, the display value is automatically held until the next measurement, which is very convenient for repeated measurement and recording tasks.

5. Assess transient currents at motor startup

The clamp meters can simultaneously measure inrush current in RMS as well as maximum crest values at motor startup and for welding currents.The clamp meters automatically detect the duration of the inrush current (which can range from several dozen milliseconds to several hundred milliseconds) and measure the current during that interval, enabling them to yield more accurate measurements than standard clamp-on meters whose measurement interval is fixed to 100 ms.

6. Uncompromising Design : Innovative jaw provides remarkable accessibility (CM4375-50)

Panel overcrowding is commonly found in many power distribution breakers and termination boxes. The newly designed thin sensor gets into even the most limited spaces. Eliminate the issues of trying to find the right wire or forcing the clamp around thick cables.

Damage-resistant jaws! Guaranteed for 30,000 open-close cycles

The new and improved design features stronger jaws (the current sensor portion of the instrument) and a dramatic boost in the duration of the warranty from 10,000 to 30,000 open-close cycles to ensure the instrument will provide even more years of reliable use. The CM4375siries deliver the dual functionality of ease of clamping and resistance to damage.

7. Uncompromising Design : Innovative Jaw Design
Clamp Sensor gets between wires even with Large Jaw Diameter (CM4141-50)

Despite the ability to measure up to 2000 A AC afforded by the large sensor with φ55mm core diameter, the clamp meter’s innovative jaw design lets you get between the narrow spaces between crowded cables with absolute ease. In addition, electrical panels are sometimes so crowded that you need to push and pull to the clamp to get it around the cable. The CM4141-50 features a robust construction that delivers strength while letting you weave through complex wiring to get to the right cable, vastly improving work efficiency and speed.

Compared with clamp meters of similar class, the meter weighs only 300 g, at least 100 g lighter than competitors, letting you use the instrument over long work days with significantly less effort and physical strain.

Order Model Code:

AC Clamp Meter CM4141-50
AC/DC Clamp Meter CM4371-50
AC/DC Clamp Meter CM4373-50
AC/DC Clamp Meter CM4373-91 (Bundled with P2000 Special Price)
AC/DC Clamp Meter CM4375-50
AC/DC Clamp Meter CM4375-91 (Bundled with P2000 Special Price)
Wireless Adapter Z3210
DC High Voltage Probe P2000

Special Promotion: Bundle Deals Up to 90SGD Off To Maximise Work Efficiency!

Back by popular demand, the complimentary wireless bluetooth adapter Z3210 campaign is back! Running for it's 2nd year with the objective to boost work efficiency among engineers,  the campaign focus on the newly upgraded clamp meters.

In the past, technicians had to record data measured in the field on paper and create reports later. This workflow increased the likelihood that mistakes would be made when recording values on paper or entering them into a computer.

Additionally, the need to transfer values to a computer and to return to the office in order to create reports placed a significant burden on workers.
Hioki  improved the new clamp meters with wireless capability so that operators could transfer measurement data directly to handsets such as smartphones and create reports on the spot.

Hioki Singapore aims to encourage more engineers to adapt to the wireless communication capability of the clamp meters for even greater convenience. Running from 1/1/2022 to 30/6/2022, the 6 months campaign includes a complimentary Wireless Adapter Z3210 (worth 90 SGD) for selected Hioki products. Please find the details below, for more information, please email to marketing@hioki.com.sg


26 Jan 2022: Hioki Wins Nagano Institute of Invention and Innovation Chairman’s Prize for Invention Related to Electrode Resistance Measurement System at the 2021 Kanto Region Invention and Innovation Awards

Hioki Wins Nagano Institute of Invention and Innovation Chairman’s Prize for Invention Related to Electrode Resistance Measurement System at the 2021 Kanto Region Invention and Innovation Awards

Hioki is pleased to announce that its invention of an electrode resistance measurement system (patent No. 6472664) has been recognized with the Nagano Institute of Invention and Innovation Chairman’s Prize at the 2021 Kanto Region Invention and Innovation Awards, which were hosted by the Japan Institute of Invention and Innovation. The honor came in response to Hioki’s first submission of an invention to the regional award program.

The program, which was founded in 1921, recognizes engineers, researchers, and developers who realize exceptional inventions, ideas or designs in eight regions nationwide (Hokkaido, Tohoku, Kanto, Chubu, Kinki, Chugoku, Shikoku, and Kyushu).

The accolade recognized what is the world’s first technology for evaluating electrode sheets, a major component of lithium-ion batteries (LIBs), for its ability to:

(1) Generate a numerical index of contact resistance at the interface between different conductive materials, which cannot be contacted from outside a battery.

(2) Significantly reduce development times and improve development efficiency for LIBs by allowing the evaluation process to be performed before electrode sheets are embedded in battery cells.

(3) Help extend LiB service life and improve safety and performance by providing the ability to evaluate variations (uniformity) inside the materials of electrode sheets.

(4) Simplify the process of evaluating electrode sheet performance and facilitate quantitative evaluation of parameters such as batteries’ rapid charging and discharging characteristics.


These technologies can be used to make quantitative evaluations of the characteristics and quality of rechargeable batteries such as LiBs, yielding new evaluation indicators that will be effective in extending the service life and improving the safety and performance of rechargeable batteries. In this way, they will help realize a low-carbon society through transformations such as the shift to electric vehicles (EVs) and the achievement of carbon neutrality.

Hioki will continue to pursue research and technological development to bring value to people worldwide and help realize a sustainable society.

Award and recipients

Nagano Institute of Invention and Innovation Chairman’s Prize
Electrode resistance measurement system (patent No. 6472664)

Yuki Kawamuro, EM Unit, HIOKI E.E. CORPORATION
Nobuhisa Handa, EM Unit, HIOKI E.E. CORPORATION
Tetsuya Takahashi, Manager, EM Unit, HIOKI E.E. CORPORATION

Introduction to a product that uses the award-winning invention

The RM2610 Electrode Resistance Measurement System is a quantification and measurement system that isolates the resistance characteristics of electrode sheets, a major component of LIBs, into the composite layer resistance and the interface resistance between the composite layer and the collector. Potential is measured by placing a test fixture (consisting of test probes) in contact with the surface of an electrode sheet. Then a proprietary Hioki analytical method is used to visualize the composite layer resistance and the interface resistance between the composite layer and the collector.

In the past, it was not possible to evaluate electrode sheets until the LiB containing them was assembled, requiring companies to spend valuable man-hours on prototype production. In addition, the conventional measurement method (measuring pass-through resistance and volume resistivity using the 4-probe method) measured only the electrode sheet’s overall resistance characteristics. There was no method for ascertaining the electrode sheet’s composite layer resistance or the interface resistance between the composite layer and the collector. The ability to assess these resistance characteristics dramatically improves LiB quality and development efficiency, not only by allowing engineers to make detailed observations of how different materials, compositions, and manufacturing conditions can improve performance, but also by enabling evaluation at the electrode sheet stage.

30 Nov 2021: Hioki Named a “Great Place to Work® Certified Company” in 2022 Great Place to Work® Rankings

Hioki Named a “Great Place to Work® Certified Company” in 2022 Great Place to Work® Rankings

Hioki is pleased to announce that on October 1, 2021, it was chosen as as a “Great Place to Work® Certified Company” by the Great Place to Work® Institute Japan (GPTW Japan). The accolade indicates that Hioki has been officially certified as a Great Place to Work® company as a result of its exceptional workplace culture as evaluated by an employee questionnaire.

“Great Place to Work®” certified company page (Japanese Website)

Hioki has taken a variety of steps to date to improve the workplace environment while boosting employee satisfaction and motivation, reflecting its corporate philosophy of Respect for Humanity and Contribution to Society. These initiatives led to the company’s selection as a “Great Place to Work® Certified Company.” Currently, Hioki is mounting a companywide effort to implement the Vision 2030, which was formulated in 2020, and individual employees are embracing conduct founded on an awareness of the meaning of their own jobs how they relate to the vision. A culture that encourages all employees to take ownership of their jobs as CEOs is serving to improve employee motivation.

Each employee is the CEO

Going forward, the Hioki Group will continue to strive to create an environment that maximizes employee performance while fostering new collaboration and to work towards new improvements so that all employees feel a sense of satisfaction and motivation.

The certification covers only Hioki’s Head Office since the company applied to GPTW Japan.

In a separate process, Hioki was also chosen as Best Company in the 2021 Best Place to Work® Japan Rankings in the medium-size category. A summary of a seminar talk by Hioki president Takahiro Okazawa introducing some of the company’s initiatives in this area can be found on the “Introduction/Initiatives: Interviews with CEOs at Selected Companies” section of GPTW Japan’s website.

About the Great Place to Work® Institute Japan


The Great Place to Work® Institute operates in about 60 countries worldwide, where it investigates and analyzes “Great Place to Work®” companies and publishes the results on national websites and in major media outlets. In the U.S., the Institute has published Great Place to Work® rankings through Fortune magazine each year since 1998, and inclusion in the list is widely considered the hallmark of a first-rate company.

The Great Place to Work® Institute Japan has been licensed by the Great Place to Work Institute to compile rankings for companies in Japan.

30 Nov 2021: AC Leakage Clamp Meter CM4001/CM4002/CM4003 Wins FY2021 Good Design Award

AC Leakage Clamp Meter CM4001/CM4002/CM4003 Wins FY2021 Good Design Award

Hioki is pleased to announce that its AC Leakage Clamp Meter CM4001/CM4002/CM4003 has received a FY2021 Good Design Award from the Japan Institute of Design Promotion.

The Good Design Awards have served as a vehicle for comprehensive design evaluation and recommendation for more than 50 years. The accolade brings to 77 the total number of Good Design Awards (including two Long Life Design Awards) that Hioki has received since 1985.


In bestowing the honor, judges offered praise for how the products combine measurement functionality with design features, for example with sensor unit jaws that fit easily into gaps between densely packed wires and clamp easily around target wires as well as multiple form factors that can be chosen based on the thickness of the wires being measured, and for how their design accommodates customers’ requests.


1. Mains signaling measurement
2. Current measurement method for unbalance and detailed trends
3. Lock with password verification

AC Leakage Clamp Meter CM4001/CM4002/CM4003 features

The AC Leakage Clamp Meter CM4001/CM4002/CM4003 features jaws whose shape allows them to be clamped around complex electric wires safely and easily without the need to shut off the electricity. Furthermore, the instrument’s newly designed sensor unit can accurately detect minuscule leakage currents. The meter also can be wirelessly paired with a mobile device, offering a standalone solution for monitoring leakage current. The CM4001/CM4002/CM4003 facilitates highly reliable maintenance inspection work in order to prevent electrical problems before they occur and eliminate electric shock, fire, and electrical energy loss.

Principal applications
·Regular inspections of electrical equipment

Comments from judges

The product’s event logging functionality provides a single-instrument solution for monitoring intermittent leakage phenomena over extended periods of time. Two wire clamp form factors are available: one for separating a single target wire from multiple closely-spaced wires, and another for measuring multiple thick wires at once. I found the product to have an excellent design that reflects careful thought about a variety of leakage phenomena and about how various work conditions and approaches can best be accommodated.

Good Design Award official website 

Please visit the official website of the Japan Institute of Design Promotion for overviews of award-winning products.

Hioki design

Hiok’s approach to product design seeks to enrich lifestyles and society as a whole by focusing on how customers feel when they hold and use its instruments. Hioki will continue to propose designs that blend seamlessly into people’s lives.  Please visit Hioki Design (a minisite that details the company’s approach to design).


For more product information, please click on the links below:

AC Leakage Clamp Meter CM4001

AC Leakage Clamp Meter CM4002

AC Leakage Clamp Meter CM4003


24 Nov 2021: Acquired Silver Medals in EcoVadis’s Sustainability Assessment

Acquired Silver Medals in EcoVadis's Sustainability Assessment

HIOKI was evaluated as "Silver" in the sustainability evaluation of EcoVadis (EcoVadis / Headquarters: France).

Currently, based on our long-term management policy, "Vision 2030," we are contributing through the electrical measurement business, reducing the impact on the environment, and accelerating efforts to realize a sustainable society together with customers around the world. As a result, the companies that achieved the top 25% of all evaluation goals were given a "silver" rating. Based on this evaluation, we will further promote our efforts and contribute to the realization of a sustainable society.

About EcoVadis's sustainability assessment


EcoVadis is an international and reliable sustainability assessment organization that analyzes and uniquely evaluates supplier companies' efforts to improve their environmental initiatives and social practices in the supply chain. To date, we have conducted assessments of more than 75,000 companies in 200 industries in 160 countries around the world.

This assessment covers four themes: environment, labor, human rights, ethics, and sustainable sourcing.


EcoVadis website

11 Nov 2021: PQ3198 Certified as Class A IEC 61000-4-30 Edition 3

PQ3198 Certified as Class A IEC 61000-4-30 Edition 3

The PQ3198 is a power quality analyzer for monitoring and recording power supply anomalies, allowing their causes to be quickly investigated, and also for assessing power supply problems such as voltage drops, flicker, harmonics, and other electrical issues.


The IEC61000-4-30 standards


The IEC61000-4-30 defines how to measure and analyze power quality in AC power supply systems. It classifies the measurement methods and capabilities of measuring instruments into 2 classes of A and S. The most reliable power quality measurement is Class A. The requirements for Class A are not only stipulated in terms of functions and accuracy, but also include detailed measurement algorithms and time clock accuracy.


Classification of Power Quality Measuring Instruments


Class A: Used when precise measurements are necessary to resolve disputes in courts of law and to verifying compliance with standards.


Class S: Accuracy level is lower compared to the class A. These instruments are used for qualitative surveys, trouble-shooting and other applications where high accuracy is not required.


Edition 3


Edition 2 of this standard was discontinued in 2015 and replaced by Edition 3. Most leading power quality instruments only cover Edition 2. Here at HIOKI, our mission is to contribute to the creation of a sustainable society. That is why we are proud to provide this measurement that will further the power quality in factories and utility companies across the globe. The PQ3198 can measure the following required and optional items stated in Edition 3.

Power Quality parameters:

Required by Edition 3

Optional items supported by the PQ3198

Power frequency



Current harmonics


Current inter-harmonics

Voltage dips & swells

Current unbalance

Voltage interruptions


Voltage unbalance

Voltage harmonics

Voltage inter-harmonics

Main Signaling voltage


Update your PQ3198 to comply with the Edition 3 standards.


We have updated our PQ3198 firmware to comply with the IEC 61000-4-30 Edition 3.
You can download the firmware here.

Here are the few updates we made on the firmware:


1. Mains signaling measurement
2. Current measurement method for unbalance and detailed trends
3. Lock with password verification


To prove that your equipment complies with the standard, special test were made by third party entities. The test methods are defined by IEC 62586 for verifying compliance with IEC 61000-4-30. Measuring methods for instruments that comply with Class A of IEC 61000-4-30 are defined as PQI-A in the IEC 62586-2 standard. Equipment that has been certified to comply with the standards will receive a certificate of conformity (CoC). Download the CoC of the PQ3198 here.

Finally, when choosing a power quality instrument to conduct energy auditing or power quality analysis, it is important to choose equipment that has been evaluated according to the proper standards. Some customers might need it just because it is regulated in their region while some might need it to show that their measurement results are of high quality and integrity. Either way, we at HIOKI have got you covered.


* Company and product names used in this release are the trademarks or registered trademarks of their respective owners.

14 Oct 2021: The People Behind the New Best HIOKI Digital Multimeter DT4261

The People Behind the New HIOKI Digital Multimeter DT4261


Article written by Jessie Goh (Intern)


The new HIOKI Digital Multimeter is like no other.

Supporting measurements up to DC 2000V, wireless features, and having the ability to analyse harmonics in the field among other key features – the new HIOKI DT4261 is powerful. Unlike previous models, the DT4261 far exceeds expectations with its multiplied efficiency and superb performance. This is the digital multimeter that sets new standards as the engineer’s new best friend.

All of this is no wonder, as the new digital multimeter is specially handcrafted by our meticulous engineers with the rugged engineer in mind. But even so, the DT4261 is a digital multimeter that appeals to both seasoned and entry engineers. This is a product so good a 3rd year engineering undergraduate (also Hioki's Intern of 3 months) like myself silently (not so silently) wishes to get my hands on the multimeter for my university lab projects.

The DT4261 has in itself a certain charm that numbers and statistics cannot describe. With that, let us walk through the creation of DT4261, with a rare interview with the people behind this new HIOKI best digital multimeter: DT4261 Development Project Leader Mr. Takeaki Miyazawa, Hardware Team Leader Mr. Yusuke Abe and Product Marketing Team Leader Mr. Kohei Narita from HIOKI E. E. Corporation. These are some highlights of our conversation.

Mr. Takeaki Miyazawa will be denoted by (TM), Mr. Yusuke Abe denoted by (YA), and Mr. Kohei Narita will be denoted by (KN).


Thank you for agreeing to do this interview with us! Can you share with us more about the reasons behind creating the DT4261 and what were your motivations?

TM: So far, HIOKI did not have a wireless digital multimeter. Therefore, our development team wished to launch a multi-meter with such wireless capabilities. One of the major motivations of creating the DT4261 is to have an advantage over other competitors with this wireless feature. Another motivation of creating the DT4261 was the increasing need to measure high voltages in the photovoltaic (PV) systems sector, and HIOKI would want to create a digital multimeter that better suits the needs of that sector. To support higher voltages, we will also be launching the new optional P2000 probe that can be used with the DT4261, in December later this year. These are the motivations for creating the new DT4261.

HIOKI DT4261 with P2000 Probe

High Voltage Probe P2000
(to be launched in December 2021)

What kind of applications and industry are the P2000 and DT4261 meant for?

KN: The main target for the P2000 is the electrical maintenance industry, such as power utility contractors. Apart from electrical maintenance, the solar PV market is one of the key target markets for the P2000.


What was the project journey like and how did your team go about creating the DT4261?

TM: Firstly, the team decided on the concept of DT4261 and what DT4261 should have. At that point, the most important feature we wanted to have was the wireless capability. Secondly, we had to think on how the DT4261 is to be used by end-users. From that point of view, we decided that the DT4261 must be used on-site and as such, it must not break easily and be designed for ruggedness. With these concepts in mind, we designed the DT4261 for different uses, which help to pinpoint specific features of the DT4261 such as it being waterproof, dustproof and having the shutter safety feature.

YA: The development of DT4261 lasted from February 2019 till now. Apart from what was said earlier, we wanted to hear our customer’s feedback for the DT425X and DT428X multimeters. From our customer’s feedback, we have learnt that the shutter safety function is one of the most wanted features in a multi-meter. However, if the safety shutter function is incorporated, the multi-meter will not be able to conduct open circuit checking due to hardware limitations. To overcome this difficulty, we have included a fuse checking feature, to improve safety and reliability on the new DT4261. In summary, our project journey first started off with deciding on the most important feature, how it is being used by end-users, and listening to customer feedback.

Thank you for sharing more about your project journey. Then, can you share with us some challenges and difficulties faced in creating the DT4261?

YA: One of the biggest challenges faced in the development of DT4261 was meeting the IP54 standards, as it is our first time working with such high definitions of IP54 with our digital multimeters. Especially for the waterproof standards, which entailed the digital multimeter not getting damaged under wet conditions. This proved to be difficult due to input holes on the body required for test probes. To counter this, we made the open body holes water repellent to accommodate waterproofness and the shutterfunctions, as well as changes to the button rubber shape. To achieve waterproofness, we also reviewed the designs of all existing digital multimeter models.

A lot has been done to accommodate all these ideas. Likewise then, what did you enjoy the most about creating the DT4261? Or perhaps any memorable moments you would like to recount?

YA: The creation of the DT4261 was really memorable firstly because we had a lot of younger engineers with us for this project. They have been really enthusiastic and given us a lot of new suggestions and ideas, such as fuse check functions. All of which we did our best to include all of it in the new DT4261. Hopefully this motivates them.

TM: Secondly, as we have reviewed the designs of all existing HIOKI digital multimeters, there are a lot of features we can incorporate. Product evolutions are usually quite simple, but instead this time we decided to do something new by adding many new things. As such, we needed to evaluate deeper which resulted in a rather challenging journey with lots of failures, refinements and problem solving. This made us a little worried that we might not be able to make it to the launch deadline. Fortunately, we were able to make it in time!

That must have been quite the journey! Among all these features, what kind of engineer was the DT4261 created for?

TM: As our team had a lot of highly motivated and younger engineers, we had a lot of ideas for the DT4261. Despite the many challenges, we were able to overcome all of them thanks to their resilience and innovative thinking. Not only that, these engineers were perfectionists as well. An example would be the integrated cap feature on the L9300 Test Probe. How to slide the cap, was also an idea of theirs. These ideas were being thought about very thoroughly, such as whether it was worth it for the end-users. The DT4261 is also very precise and accurate, and would suit engineers who are perfectionists.

“DT4261 is not only a wireless multimeter, but also a durable multimeter with safer features. This is ideal for more senior engineers. " – Mr. Takeaki Miyazawa, DT4261 Development Project Leader, HIOKI E. E. Corporation

Since the DT4261 is the first wireless digital multimeter that HIOKI has created, are you worried that more senior engineers will not be able to use or appreciate the new DT4261?

TM: Additionally, senior engineers would use oscilloscopes in their work, which is not handy and cannot be brought onto the field. This is where digital multimeters are useful. They can display waveforms like the oscilloscope, and are also handy. Even though these waveforms are simpler ones, being able to see such waveforms is a valuable feature for senior engineers.

YA: While there are more features that are appealing to younger engineers, there will be more younger engineers in the industry as time passes. Younger engineers do not have as much experience, and to acquire suitable experience, they require suitable tools.

“Therefore, the DT4261 with wireless capability can be a suitable tool for younger engineers to use and grow. " – Mr. Yusuke Abe, DT4261 Hardware Team Leader, HIOKI E. E. Corporation

As we all know, HIOKI’s digital multimeters play a key role in the branding of the HIOKI we know today. In what way does the DT4261 contribute to the legacy of HIOKI’s digital multimeters?

TM: For our digital multimeters thus far, we have only focused on hardware design, such as making it tough and durable. We listen to customer’s feedback attentively as well, but it usually is also aspects of hardware. This multimeter is a lot more special, as we have incorporated wireless communicative features that enable users to use onsite, which improves data transfer of site measurements.


“From this, DT4261 is another starting point in HIOKI’s multimeter history, in terms of more efficient data transfer and convenience for users. “ – Mr. Takeaki Miyazawa, DT4261 Development Project Leader, HIOKI E. E. Corporation

You have shared a lot about the functions of the DT4261 and since you have brought along the multimeter, will you share with us some design improvements of the DT4261?

YA: There are 3 main design improvements. Firstly, to make the multimeter easier to grab, we have redesigned the DT4261 to have a slimmer and curved body.

Secondly, we made changes to the rotary switch. The rotary switch in existing digital multimeters protrudes out of the body, which results in unstable rocking when placed face down. The DT4261’s rotary switch is flushed against its body, resulting in a flat multimeter front surface. As such, there will be no unstable rocking when the DT4261 is placed on the table like this.



Thirdly, the battery box on the rear end. So far for existing models, we have to use screws to open the lid. However with this new design, users can easily open the battery box with a coin. This may be a small point, but when thinking about users on the field, there is a higher chance of users having coins on them compared to screwdrivers. This will help make it easier for them to open the battery box on the digital multimeter on site.


Many thanks for sharing so much about the DT4261. Are there any more things you hope to share with everyone?

KN: Last but not least, we would like to talk about the optional P2000 Probe. With the P2000 probe, the DT4261 can measure up to DC 2000 V. This is under CAT III specifications. This is the world’s first multi-meter that can measure up to DC 2000 V CAT III. The P2000 probe will be launched in December. Users will not have any more concern about measurements up to DC 2000 V with the DT4261. We would like all of you to stay tuned for the P2000 Probe launch and we are convinced that you will welcome this combination of P2000 and DT4261.

TM: We believe that the DT4261 can contribute to better data transfer on site with its wireless communication ability. The wireless communication ability allows users to connect the DT4261 to their smartphones and tablets, using the GENNECT Cross application software. DT4261 with GENNECT Cross can display harmonics and waveforms onsite on the user’s mobile or tablet screen, which is efficient and effective for any maintenance engineer who works in the field.

The DT4261 will be released for Pre-Order on 15 October 2021 for Singapore, Malaysia, Vietnam, Thailand, Philippines and Indonesia regions. Click here to Pre-Order.


For more product information, please click on the links below:

Hioki Digital Multimeter DT4261 Product Introduction

Hioki Digital Multimeter DT4261 Product Information

Hioki Digital Multimeter DT4261 Catalog

Hioki High Voltage Probe P2000 

1 Oct 2021 : Hioki Launches Digital Multimeter DT4261

Hioki Launches Digital Multimeter DT4261

Bluetooth® to Improve Efficiency


The wait is over. Hioki Singapore  is pleased to announce the launch of Digital Multimeter DT4261.  To celebrate the 75 years of Hioki Digital Multimeters innovation, there will be a special pre-order launch on 15 October 2021, 10 00hrs. In addition to the DT4261, end users who registered their interest will also be given a complimentary Wireless Adapter Z3210 and limited edition DT4261 keychain.

Pre-order sales will take place from 15 October 2021 - 29 October 2021, and is opened to South East Asia countries.

The official launch will take place from 30 October 2021, and customer will only receive the limited edition keychain.

When the Wireless Adapter Z3210 is installed, Bluetooth® wireless communication is enabled. It will boost work efficiency in the field by entering your measured data directly into Excel templates. Furthermore, when using with the free GENNECT Cross mobile app, you can perform simple harmonic analysis.

Please find more details about the DT4261 here:
DT4261 Special Introduction Page

Development Background

At present, Hioki has been expanding our lineup of on-site measuring instruments that support Bluetooth® wireless communication in order to streamline electrical equipment inspection performed by electricians and maintenance technicians. The increase of efficiency cuts the costs of these technicians, but in addition, in certain regions like the home country of Hioki, Japan, the aging population and decline of skilled technicians in the labor force has become an issue. Partly due to this market environment, we at Hioki have focused on improvement of work efficiency using IoT.


1. Wireless Support: Excel Direct Input Function

When the Wireless Adapter Z3210 is installed, Bluetooth® wireless communication is enabled, opening the door to many innovations availed by Bluetooth®. One such innovation is the Excel Direct Input Function. We embedded this function in the Wireless Adapter itself. It enables direct transfer of measurement data to Excel® templates on your smartphone or tablet. This Excel Direct Input function will boost work efficiency by eliminating the bothersome task of entering data after returning from the field.


2. Harmonic Measurement

When combined with the free GENNECT Cross mobile app, you can perform simple harmonic analysis. Applications for this function include harmonic measurement of power conditioners for solar systems and problem analysis of power supply systems.


3. Excellent Dust and Water Resistance (compliant with the IP54 international standard)

Highly dust-proof and water-proof suited for rugged use.


4. Auto Fuse Check Function – Prevents Incorrect Current Measurement

When switching from the clamp function to the current function, a fuse disconnection check is automatically performed. This allows the user to know if the fuse is broken before current measurement, which prevents erroneous measurement.

Ensuring safety by preventing erroneous test lead insertion (terminal shutters)

Ensuring safety by preventing erroneous test lead insertion (terminal shutters)

Test Lead L9300 incorporate integrated caps for greater convenience and safety.

Test Lead L9300 incorporate integrated caps for greater convenience and safety.

6. Ensuring Safety through Mechanical Innovations for the Test Lead

Typically, technicians must be careful not to measure voltage while a test lead is plugged into the current terminal rather than the voltage. Otherwise the fuse to blow, ending in a fuse that needs to be replaced and lost man hours until the replacement. Hioki, however, solved this problem through innovation with the Middle Model Digital Multimeter DT4261. The multimeter’s terminal shutters are linked to the instrument’s rotary switch in way that blocks access to test lead terminals that aren’t being used. This makes it physically impossible to insert test leads into the wrong terminal.

In addition, Hioki’s new test lead now incorporates easily adjustable sleeve instead of a cap for greater convenience and safety. The design lets you change the measurement category simply by sliding the test lead’s protective finger guard up or down and locking into place. This makes it easier than ever to measure safely, and as an added bonus, you no longer have to worry about losing caps.

7. Supports Measurements up to DC 2000V for PV Solar Systems with P2000 Probe (to be released in December 2021)

The increasing prevalence of large Photovoltaic Systems comes with the increasing need of measuring voltages above DC 1000V. The DT4261 safely supports measurements between ground to DC 2000V (CAT III 2000V, CAT IV 1000V) with the optional DC High Voltage Probe P2000.

P2000 to be released in December 2021.

More about DC High Voltage P2000 Probe

8. Multifaceted Functionality and Performance for a Variety of Tasks

•  Ability to withstand a 1m height drop onto concrete (drop-proof design)
•  Broad operating temperature range of -25°C to 65°C
•  Automatic detection of DC and AC voltages (AUTO V function)
•  Visual warning of excessive input via red backlight
•  Visual indication of HOLD operation via orange light

Engineers' NEW Best Multimeter

We have reshuffled and curated our list of Digital Multimeters into a chart for your viewing convenience. Up to date, we have a total of 12 Digital Multimeters specially designed to suit your every need.  With the Good, Better, Best, Supreme concept, we hope that this will provide customers a better idea when choosing the right multimeters for their application.


Click here for more detailed DT4261 specifications

Main Uses

  • Electrical equipment maintenance, verification and troubleshooting in electrical work
  • Large Commercial Solar Farms


Digital Multimeter DT4261
Digital Multimeter DT4261 Kit (set with Wireless Adapter Z3210)
Wireless Adapter Z3210: accessory

Download the catalog here:
DT4200 Series