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This section provides an overview for earth resistance meters as well as their applications and principles. Also, please take a look at the list of 12 earth resistance meter manufacturers and their company rankings. Here are the top-ranked earth resistance meter companies as of January, 2025: 1.Chauvin Arnoux Metrix, 2.Gossen Metrawatt GmbH, 3.PCE Instruments UK Ltd.
Table of Contents
An Earth Resistance Meter is a device that measures the electrical resistance between an electrical device and the earth. It is one of the most familiar devices for electricians and electrical practitioners. Grounding refers to the connection between the earth and electrical equipment.
When an abnormality occurs in electrical equipment, a person touching the equipment may receive an electric shock. By grounding electrical equipment, it is possible to release the electric current to the earth in the event of an abnormality. Secure grounding is very important for the safety of electrical equipment. The state of being securely grounded is called "grounded."
Earth Resistance Meters are used for grounding work and electrical equipment inspections. Grounding is the process of burying a metal or other electrical conductor deep underground. It is one of the most important works for electricians, and is classified into four types from A to D according to the intended use of the grounding.
The grounding pole for high-voltage equipment is called Class A grounding, which must maintain a resistance of 10 Ω or less, and the grounding pole for low-voltage equipment of 100 to 200 V is called Class D grounding, which is specified as having a resistance of 100 Ω or less.
During grounding work, check the grounding resistance using an Earth Resistance Meter. Electricians and chief electrical engineers use Earth Resistance Meters on a daily basis.
The measurement principle of the Earth Resistance Meteris Ohm's law. The Earth Resistance Meter applies an alternating voltage between the pole to be measured and the pole to be compared. After the voltage is applied, the current flowing between the two poles is measured, and the ground resistance is calculated by dividing the current by the applied voltage.
Although the above method can be used to calculate the ground resistance, this method measures the ground resistance of the target pole and the pole to be compared, plus the ground resistance of the two poles. Therefore, a separate grounding pole dedicated for voltage measurement is provided to measure the grounding resistance of the target pole only.
If a DC voltage is used in the Earth Resistance Meter, electrolysis occurs and the current value cannot be determined. Therefore, AC power is often used in Earth Resistance Meters. Since AC power supplies are affected by lead capacitance at higher frequencies, power supplies with a frequency of 1 kHz or lower are used.
There are three types of Earth Resistance Meters: analog display, digital display, and the method of reading the scale value when the scale needle displays "0". As an example, the procedure for using an analog display type is shown below.
The Earth Resistance Meter comes with a metal rod called an auxiliary grounding pole, which is embedded in the ground when measuring earth resistance.
The procedure for other Earth Resistance Meters is basically the same as the analog display method, but the "read the scale value when the scale needle shows "0"" method reads the scale value when the scale needle shows "0". The green, red, and yellow wires attached to the Earth Resistance Meter are used to connect each grounding pole to the terminals on the body of the Earth Resistance Meter.
In addition to these, there are also clamp-type Earth Resistance Meters that measure earth resistance by clamping the ground wire. It is easy to measure because there is no need to bury the auxiliary pole in the ground, but it can be used only in the case of multiple grounding.
Insulation testers and Earth Resistance Meters differ in measurement items and objects to be measured. An insulation tester measures an electric circuit to check the insulation status, while a grounding tester measures the grounding pole to check the grounding resistance.
The insulation tester applies a DC voltage, while the Earth Resistance Meter applies an AC voltage. Although the appearance and names of the devices themselves are similar, it is important to understand the above-mentioned differences between them in advance.
*Including some distributors, etc.
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Greenlee Textron, Inc., founded in 1862, operates as a significant manufacturer in the industrial and electrical tool industry. The company provides a range of products and solutions related to warehousing, transportation, and general storage. As a key contributor in the machinery manufacturing sector, Greenlee Textron, Inc. offers power-driven hand tools and other general purpose machinery, addressing various industrial needs. The company's business in multiple locations, including Rockford, IL, and Southaven, MS, underscores its run to serving diverse sectors and fulfilling the requirements of professionals worldwide.
Headquartered in Everett, Washington, Fluke is an American-born company operating since 1948. Fluke offers a variety of testing equipment including digital multimeters, thermal cameras, solar PV testing equipment, thermometers, oscilloscopes, leak detection devices, as well as testing-equipment related accessories. Fluke offers direct online sales.
Circutor, established in 1973 and headquartered in Barcelona, Spain, is a manufacturer that develops technology and solutions for the electrical and energy sector. The company's products include measurement and control devices, metering equipment, control systems, and harmonic filtering. It also offers power factor correction and portable power analyzers, such as the MYeBOX-150+3 FLEX-R45. Its products help to reduce CO2 emissions by reducing energy consumption. It serves a range of industries such as generator, tertiary sector, and home use.
Promax Test & Measurement SLU, founded in 1963 and based in Barcelona, Spain, is a manufacturer of telecommunication instrumentation and electronics equipment. The ISO 9001-certified company stocks products like digital modulators for broadcast, earth resistance meters, and optical fiber fusion splicers used to provide testing solutions for satellite, cable, and digital terrestrial television. It stocks over 200 products at its Barcelona facility, with 18 calibration centers and several service centers worldwide. It produces on-demand PCB circuit boards and electronic equipment and offers software development, training, and industrial design services.
Yokogawa Test & Measurement Corporation was founded in Japan in 1954. Yokogawa currently serves a wide array of industries including the aerospace, automotive, consumer electronics, semiconductor and telecommunications industries with both hardware and software solutions. Among Yokogawa’s suite of products are oscilloscopes, voltage probes, power analyzers and meters, data acquisition tools, optical test equipment, a wide variety of handled meters, calibrators, and testers; analog instruments, and manometers.
Founded in 1940, Kyoritsu has an 80 year history as a customer-focused organization specializing in multimeters. Kyoritsu provides analog multimeters as well as digital multimeters with and without clamps offering many varieties of measurement.
Chauvin Arnoux began in 1893 in France and took off in 1905 with the invention of the magneto ohmmeter. Chauvin Arnoux is an integrated manufacturer of portable test and measurement instruments used in the electrical sector, education, laboratories, and maintenance. A sample of Chauvin Arnoux’s products include calibrators, electrochemical measurements, relays, analystical software, and accessories. Chauvin Arnoux also offers industrial subcontracting, leveraging its large network of independently operating yet functionally integrated subcontractors’ abilities to manufacture and install PCBs, specialty items, sheet metal, tooling, and more.
PCE Instruments UK Ltd., started in 199 and headquartered in Manchester, UK, is a manufacturer and supplier of test instruments, equipment, and tools for weighing, measuring, and control systems. The company offers more than 500 test equipment, including analyzers, inspection cameras, meters, detectors, and sensors, with applications in various fields like data acquisition, electrical engineering, environmental science, building inspection, and food processing. Its manufacturing and development division is ISO 9001 certified, all its test instruments, equipment, and tools are factory calibrated, and the company also provides services for custom test instrument design, installation, and maintenance.
Fluke Calibration, established in 1948, headquartered in Everett, Washington, is a manufacturer, distributor, and supplier of precision calibration equipment and software. Their products include temperature calibrators, electrical calibrators, and pressure calibrators, serving industries such as aerospace, automotive, manufacturing, and pharmaceuticals. Their calibration solutions ensure accurate measurements, compliance with industry standards, and traceability. Their products are used to calibrate and maintain the accuracy of instruments, making them essential tools for industries that require precise measurements and consistent performance.
Hioki E.E. Corporation was founded in 1935 and headquartered in Ueda, Nagano. Hioki provides testing & analysis, manufacturing & inspection, and equipment maintenance to industries including mobility, battery, motor, energy, electronic components, and infrastructure. Hioki’s has 10 primary product categories which are: recorders and data loggers including oscilloscopes, LCR/Resistance Meters, safety testing including signal generators and calibrators, power meters including power quality analyzers, probes & sensors, optical & PV maintenance & telecommunication, environmental measuring, DMM & testers & field measuring, IoT & new solutions & meter relay, and bare board & package testing.
GMC Instruments is the result of a merger in 1993 from companies originally dating back to 1906. Under the Gossen Metrawatt and Camille Bauer brands, the company provides hardware, software, and services to several industries including medical devices and manufacturing. The company’s hardware division provides electrical safety devices, photometry equipment, energy management systems, and vital signs measurement devices. The company’s software lineup includes database management software, power analysis software, and medical device software.
Ranking as of January 2025
Derivation Method| Rank | Company | Click Share |
|---|---|---|
| 1 | Chauvin Arnoux Metrix |
17.6%
|
| 2 | Gossen Metrawatt GmbH |
12.6%
|
| 3 | FLUKE Corporation |
10.9%
|
| 4 | PROMAX Test & Measurement SLU |
9.2%
|
| 5 | Kyoritsu |
8.4%
|
| 6 | PCE Instruments UK Ltd |
7.6%
|
| 7 | Greenlee |
7.6%
|
| 8 | HIOKI E.E. CORPORATION |
5.9%
|
| 9 | Yokogawa Test & Measurement Corporation |
5.9%
|
| 10 | CIRCUTOR |
5.0%
|
Derivation Method
The ranking is calculated based on the click share within the earth resistance meter page as of January 2025. Click share is defined as the total number of clicks for all companies during the period divided by the number of clicks for each company.Number of Employees
Newly Established Company
Company with a History
*Including some distributors, etc.
*Including some distributors, etc.
| Country | Number of Companies | Share (%) |
|---|---|---|
|
Japan
|
3 | 33.3% |
|
United States of America
|
2 | 22.2% |
|
Spain
|
2 | 22.2% |
|
United Kingdom
|
1 | 11.1% |
|
Netherlands
|
1 | 11.1% |
11 products found
11 products
Kowa Keiso Co., Ltd.
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■Summary Leakage current and ground wire resistance of ME equipment can be measured with this one device. It is possible to measure leakage current...
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Sanwa Electric Meter Co., Ltd.
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■3-range rated voltage, lightweight design ・Analog 3-range type of 250V, 500V, and 1,000V, maximum scale of 2,000MΩ at rated 1,000V ・Maintains me...
Sanwa Electric Meter Co., Ltd.
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■〝Smart Style〞 7 range type insulation resistance meter ・Digital type with rated 7 ranges ・15V・25V・50V・100V・125V・250V・500V ・Maintains me...
Yagyu Shokai Co., Ltd.
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■Features -Connects to a smartphone or tablet via Bluetooth®, allowing operation and data storage from a distance (up to approximately 10cm). - Mea...
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4.0 Company Review
■ Supports ground resistance and ground voltage measurement. ・ Both support of "Sanshin type" of precision measurement and "two -wire type" for si...
Japan INSDAC Co., Ltd.
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■Features ・Conductor resistance measurement (DET4300) ・Soil resistance measurement (DET4300) ・LCD background light ・Data hold ・LED indicator f...
Time Technology Japan Co., Ltd.
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The earth resistance meter AR4105B is a measuring device that measures earth resistance simply and accurately. There are large switches with an emp...
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The compact and lightweight design makes it convenient for long-time work and portability. Automatically determines and measures AC voltage (true e...
A-Gas Japan Co., Ltd.
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2 models listed
A-Gas Japan Co., Ltd.
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■Features ・Grounding resistance 0~2kΩ, earthing voltage 0~200V ・Measurement can be performed at a measurement current of 2mA without operating th...
