This section provides an overview for ohmmeters as well as their applications and principles. Also, please take a look at the list of 30 ohmmeter manufacturers and their company rankings. Here are the top-ranked ohmmeter companies as of November, 2024: 1.Valhalla Scientific Inc., 2.Amptec Research, 3.Tempco Electric Heater Corp..
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Engaged in research on nitride semiconductor growth using the MBE method at Waseda University Graduate School. After graduating from graduate school in 2016, he joined a non-ferrous metal manufacturer.
Engaged in equipment maintenance and engineering work at metal smelting plants. Moved to a chemical manufacturer in 2022. Engaging in similar tasks.
An ohmmeter is a measuring instrument used to determine the resistance of an electrical circuit.
It is one of the indispensable measuring instruments in electronics and electrical work, and is available in a wide range of accuracy and range. They are called ohmmeters because they use Ohm's law to measure resistance.
There are several types of ohmmeters: milliohmmeters are specialized for resistance values of mΩ or less, insulation ohmmeters are used to measure the resistance of insulators, and ground ohmmeters measure the resistance between a grounded conductor and the earth. Although simple testers are sometimes used to check the resistance of circuits, ohmmeters with high accuracy are required in development and manufacturing.
Ohmmeters are used to measure the resistance of electric circuits. The following are examples of applications of ohmmeters:
Resistance testers are useful for locating faults in electric circuits. By measuring the resistance of each part of an electric circuit, it is possible to identify the part that is out of the normal range. This type of measuring instrument is indispensable for maintenance and security of electric circuits.
It is also used in circuit design. When designing circuits, accurate resistance measurement of elements is necessary. Some ohmmeters have a basic accuracy of 0.02% and a resolution of 1µΩ. Such ohmmeters are used in electronic device design, manufacturing, and quality control.
They also play an important role in the development of electrical devices. Electrical equipment as a product also requires accurate resistance values, which are obtained with ohmmeters.
Resistance meters are also used in the field of research and development of basic materials. Ohmmeters are used to investigate the properties of materials and circuits. They are also used in educational settings, particularly in the study of electrical and electronic engineering, to measure circuits. This enables students to understand the characteristics of circuits and how to measure resistance.
Resistance meters use Ohm's law to measure resistance. Ohm's law is a law that states that resistance, the ratio of current to voltage, is constant. This law can be used to determine the resistance in a circuit.
Ohmmeters contain a power supply and a measurement circuit. The measurement power supply is generally supplied by a battery or AC adapter. The measurement circuit also incorporates an ampere meter to detect the circuit current to be measured and a volt meter to measure the circuit voltage.
Most precision ohmmeters use a contact-type four-point method of measurement: two of the four wires pass a constant current through the object, while the other two act as voltmeters to measure the voltage. By measuring the voltage produced when a constant current flows, resistance can be determined from Ohm's law.
Simple testers use the 2-terminal method, which is inexpensive and easy to construct, while the 4-terminal method can measure resistance more accurately than the 2-terminal method because it is not affected by the resistance of the measuring leads or contact resistance.
Various types of ohmmeters are available depending on the application. The following are examples of ohmmeter types:
Analog ohmmeters use an analog pointer to indicate the resistance value. The needle vibrates according to the current flowing in the circuit, indicating the resistance value. Although they are relatively inexpensive, it is necessary to select the appropriate range according to the resistance range of the circuit to be measured.
Digital ohmmeters are resistance meters that show resistance values on a 7-segment display. They are capable of high-precision measurement and are often equipped with a function that automatically switches the range. Testers with voltage and current measurement functions are also part of digital ohmmeters.
This ohmmeter measures resistance by generating a magnetic field around the circuit with a clamp between the clamps. The advantage of this type of tester is that it can make measurements without coming into contact with the circuit to be measured. It is often used as a ground ohmmeter.
This ohmmeter is used to diagnose the insulation condition. Insulation resistance is measured by grounding one terminal, applying high voltage, and measuring the leakage current. Ohmmeters capable of applying a high voltage of about 1,000 VDC according to the system voltage are also available. Ohmmeters are widely used for maintenance at production sites.
*Including some distributors, etc.
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Tempco is based in Wood Dale, Illinois and has been in business since 1972. Tempco is a manufacturer of many types of heating elements and thermocouples with design variations. Tempco is ISO 9001:2015 certified. Temco’s electric heaters and elements include band heaters, cartridge heaters, cast-in heaters, ceramic fiber heaters, coil and cable heaters, drum heaters, enclosure heaters, flexible heaters, heat trace cable, heated hose and tubing, infrared heaters, process heaters, shroud systems, strip heaters, tank heaters, and tubular heaters. Tempco also sells various application accessories and wiring accessories.
TEGAM, established in 1979 and headquartered in Geneva, Ohio, USA, stands as a manufacturer and provider of advanced test and measurement solutions. The company serves industries such as electronics, telecommunications, and aerospace. Its product line encompasses precision measurement tools, temperature and humidity measurement devices, and RF power sensors, addressing the needs of sectors that prioritize precise measurements. TEGAM's quality is evident through its ISO 9001 certification and industry awards. American Association for Laboratory Accreditation (A2LA) has also accredited this company for its specific calibrations listed on Certificate Number 2018.01.
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.
Magtrol Inc, a company founded in 1957 and based in Buffalo, New York, is a manufacturer and supplier of measurement and control products. The company specializes in providing dynamometers, hysteresis brakes, torque transducers, and load cells. These instruments are used in a wide range of industries including automotive, aerospace, energy, and manufacturing. The company’s products are designed to measure torque, force, speed, and power, enabling customers to optimize their processes and ensuring performance. The company also provides a knowledgeable and responsive customer service team, assisting with product inquiries, technical support, and order processing.
Valhalla Scientific Inc., established in 2007 and headquartered in Austin, Texas, USA, stands as a manufacturer and supplier of slip rings and electrical motion control components. The company's product range entails slip rings, including miniature capsule slip rings, through-hole slip rings, and DC-coreless motors. It also offers electrical motion control components, spanning brushless motors, DC coreless motors, and custom motors. These products find applications across diverse industries such as aerospace, defense, energy, industrial, and medical. The company’s devotion to delivering quality slip rings and electrical motion control components reflects the company's ability to quality.
Amptec Research, established in 1997 and headquartered in Austin, Texas, USA, is a manufacturer and supplier of fail-safe igniter testers. The company's product range includes igniter testers, involving fail-safe igniter testers, high-voltage igniter testers, and low-voltage igniter testers. These testers find utility across industries like aerospace, defense, energy, industrial, and medical. The company delivers quality igniter testers, designed and manufactured to good standards. With an aim of quality, the company consistently surpasses expectations, ensuring dependability and performance in its products.
Interworld Highway, LLC, established in 2000 and headquartered in Long Branch, New Jersey, is an authorized distributor of major brands of educational and testing equipment. The company operates as an e-commerce business with two sites: TEquipment and Touchboards. Some of its offerings include test equipment such as multimeters and ground testers, as well as HVAC instruments such as leak detectors and vacuum pumps. Its products are used in various applications, including electrical testing and research purposes.
Alpha Electronics Corp., headquartered in Tokyo, Japan, has been a manufacturer of metal foil resistors since 1978. Its resistors are acclaimed for their precision, low temperature coefficient, and extended lifespan, catering to diverse applications like telecommunications, industrial automation, and medical devices. Offerings include an extensive range of resistors, including surface mount, wirewound, thin film, and SMD resistors, accommodating varying needs in industries such as consumer electronics and automotive. The company participates in a joint program with National Metrology Institute of Japan (NMIJ) on the further development of Bulk Metal Foil metrology standard resistors.
Watanabe Electric Industry Co. Ltd. are manufacturers of measurement and control instruments since 1940 in Japan. The company deals in signal converters, digital panel meters, non-contact meter relays, and electric current recorders. The signal converters are used to isolate and convert signals to prevent current ground loops, protect from external noise, signal boosting, and more. Digital panel meters also have various applications such as filter clogging monitors, weight measurement, conveyor rotation speed management, and many other uses. The equipment is known for its accuracy and stability while being in use.
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.
GW Instek or Good Will Instruments is a Taiwanese instrument maker founded in 1975. GW Instek has over 300 product lines, which include Oscilloscopes, Spectrum Analyzers, Signal Sources, Basic Tests and Measurement Instruments, Safety Monitoring Systems, and more. Leading manufacturers choose them as their test and measurement provider. GW Instek has become the leading brand in the electronic test and measurement industry. They help electronic industries reduce testing costs and increase competitiveness. GW Instek has subsidiaries in five countries and is sold to more than 80. Their mission is to reduce total costs and create customers value from cost savings.
Elabo GmbH, founded in 1972 and headquartered in Crailsheim, Baden-Wurttemberg, Germany, is a network system components and safety technology systems developer and manufacturer. The company's products include ergonomic assembly workstations in complete ESD design, complete assembly lines, and measuring and testing devices. Its products are used in manufacturing where electrostatic sensitivity is an issue. It also offers test systems that include applications in household appliance, automotive, and medical device manufacturing, with after-services including remote technical support, augmented reality room planning, and installation assistance. The company has subsidiaries in North America, Asia-Pacific, and China.
Burster Präzisionsmesstechnik GmbH & Co KG is a manufacturer of sensors & precision measurement products established in 1961 and based in Gernsbach, Germany. The company produces a wide range of sensors, calibration equipment, and testing devices. Its products include force and displacement monitoring systems, universal calibrators for in-field QA operations, and potentiometric angle of rotation sensors. The company also offers contract manufacturing, OEM, and product modification services. It chiefly serves clients in the automation, chemical processing, and industrial facility engineering sectors.
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.
Japan Finechem Co.,Inc. manufactures fine and speciality chemicals and industrial electronic components. The company was founded in Tokyo, Japan in 1959 and presently employs 272 employees overall Japan. Their product portfolio for chemicals includes organic and inorganic chemicals, intermediates for food additives and pharmaceuticals, agricultural chemicals and feed additives. In the electronic components sector they manufacture electric machinery equipment and parts such as resistors and resistor boxes. They also produce high voltage measuring devices such as digital meters, probes and dividers. These products are mainly used in industrial equipments, chemical measuring instruments, X-ray apparatuses and electron microscopes.
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.
Seaward Electronic Ltd, since 1982 is a manufacturer of electrical safety test equipment and software headquartered in Peterlee, United Kingdom, with an additional office in Tampa, Florida. The company’s product portfolio includes portable appliances, solar PV, manufacturing, medical device, and high-voltage testers. They offer various medical equipment testers such as electrical safety analyzers, patient simulators, defibrillator analyzers, and electrosurgical analyzers. They offer various electrical testers for testing resistance such as milliohmmeters, microhmmeters, and decade resistance boxes, and high voltage such as phasing sticks, voltage indicators, and safe discharge rods.
Meco Instruments Pvt. Ltd. is a manufacturer of electrical equipment, electrical testing & measuring, panel & switchboard, and environmental testing instruments established in 1962 and headquartered in Mumbai, India. The company’s product portfolio comprises solar analyzers, multifunction meters, insulation testers, current transformers, and power line transducers. They also offer various environmental testing equipment such as temperature & humidity meters, industrial infrared thermometers, digital sound level meters, lux meters, and anemometers. The company has achieved ISO 9001:2015 certification and offers products used in electrical & electrical components manufacturing, testing laboratories, education institutions, and power utilities.
Hoyt Electrical Instrument Works Inc., established in 1904, is a manufacturer of analog and digital panel meters, transformers, shunts, switches, and personal safety devices, located in Penacook, New Hampshire, the United States. The company’s products are designed to meet and exceed industry standards. It offers a wide range of test and measurement instruments, making its a comprehensive solution for customers’ needs. It is not only an analog panel manufacturer, but also has evolved to provide value-added custom solutions that keep the world spinning in the right direction.
Tinsley Instrumentation Ltd., established in 1904 and based in Essex, England, is a manufacturer and supplier of precision measurement and portable test and measurement equipment. The company's product portfolio includes transformer test equipment, insulation testers, and decade resistance boxes. These products find application in various industries, including industrial manufacturing, telecommunications, and power generation and distribution. The company offers services including technical support, customization, and ordering and logistics. The company exports its products to various countries, including the United States, China, and South Africa.
Simpson Electric Company Inc., established in 1927 and headquartered in Lac Du Flambeau, Wisconsin, United States, is a manufacturer of electrical meters, panels, and test equipment. The company's products include smart meters, advanced digital panel meters, and analog panel meters. These products are used in electrical systems and components to monitor and test power output or by maintenance professionals to inspect electrical systems. It offers contract manufacturing for punch pressing, compression molding, and wave soldering and serves industries that include power management, new energy, and automotive.
Sames has been a manufacturer and supplier of application equipment since 1925 and is headquartered in Meylan, France. The company's product range includes Airsprays, Airmix, Airless, Electrostatic and powder coating and high-viscosity solutions. These products are further classified into manual and automatic guns, pumps, regulators, machines, and controllers which have diverse uses in Transportation such as railways, cargo, tankers, truck cabs, road rails, etc. They are used by various other industries for finishing and protection applications and in the field of woodwork for bonding, polishing, and finishing furniture. The construction, automotive, and agricultural markets also benefit from Sames' products.
Kaise Corporation, established in 1955 and headquartered in Ueda City, Nagano Prefecture, Japan, is a manufacturer and supplier of electronic measuring instruments. Its product lineup includes battery checkers, jump starters, code readers, as well as oscilloscopes, and circuit testers, primarily used in automotive maintenance. Additionally, the company offers digital multimeters, clamp meters, and insulation resistance meters. Its SK-8550 Battery Checker received the 2016 Maintenance Support Award at the Automotive Newspaper Accessories Awards.
EP Hipot Electric Co., Ltd., established in 2005 and headquartered in Wuhan, China, is a manufacturer and supplier of high-voltage test equipment. The company's product portfolio includes transformer ohmmeters, impulse voltage test systems, circuit breaker analyzers, AC resonance test systems, and other high-voltage test equipment. These products have applications in various sectors, including electrical utilities, power generation, electrical equipment manufacturing, industrial facilities, and research and development. The company is ISO 9001 certified, and it provides services including technical support, maintenance, repair, and training and workshops.
Amperis Products S.L., established in 2016 and located in Barcelona, Spain, is a manufacturer and supplier of electric current sensors. The company's product range involves current transformers, including accuracy, effective-power, and miniature variants, catering to diverse industries such as power, energy, manufacturing, construction, and transportation. The company's strength lies in furnishing customers with superior electric current sensors that stand as a dependable and esteemed partner across industries. These sensors adhere to the highest manufacturing standards and are complemented by a warranty.
Metra Blansko a.s., established in 1911 and situated in Blansko, Czech Republic, is a manufacturer and supplier of traditional instruments for measuring electric and non-electric quantities. The company's products involve electrical measuring instruments such as voltmeters, ammeters, and wattmeters. It also offers non-electrical measuring instruments, including pressure gauges, temperature gauges, and flow meters. These precision instruments cater to a diverse range of industries including power, energy, manufacturing, construction, and transportation. The company’s devotion to delivering superior traditional instruments for measuring electric and non-electric quantities. It also extends its expertise through customizable solutions, technical support, and training services.
AOIP was established in 1896 and is a manufacturer and distributor of test instrumentation and electrical motor control products based in Ris Orangis, Essonne, France. The company offers various products in the portofolio, such as precision documented multifunction calibrator, handheld thermometer for thermocouples, leakshooter camera, field pressure process calibrator, and programmable digital panel meter. The products are used in various industries such as cement, mining, water plants, manufacturing, and quarries. The company has been certified with ISO 9001:2015 on the design, production engineering, marketing, services, and trade of the instrumentation and motor starters products.
Value Tronics International Inc., founded in 1992 and based in Elgin, Illinois, is a distributor of a wide range of equipment, such as signal generators, power supplies, and spectrum analyzers. The company stocks over 8,000 products, including used and new equipment from over 300 manufacturers like Berkeley Varitronics, Compression Techniques, and Delta Elektronika. It also buys obsolete and unused testing and lab equipment, which includes meters, oscilloscopes, and data loggers. The company provides financing options that allow customers to pay for purchases later. It also has a loyalty program where customers earn a 2% credit after a purchase.
Gao Tek Inc., started in 2001, and headquartered in Manhattan, New York, is a supplier of test and measurement equipment like embedded development tools, electronic measurement instruments, and telecommunication testers. The company is a B2B tech supplier that also stocks drone products, commercial gas detectors, and transceivers and is incorporated in the USA and Canada. It provides a one-year product warranty against defective material or workmanship and offers overnight delivery in the continental USA and Canada. It is a member of the GAO group and has served customers in over 50 countries worldwide.
Inspector Tools, founded in 1999 and based in Ventura, California, is a distributor and supplier of test equipment catering to sectors such as facility maintenance, building inspection, and energy conservation. The company maintains a diverse inventory featuring products from over 20 brands, including Extech Instruments, Met One Instruments Inc., and General Wire Spring Company. Offerings range from home inspection kits to carbon monoxide detectors and infrared cameras. Inspector Tools provides customers with an online catalog showcasing its entire product range. Additionally, customers can create digital accounts for faster checkouts and access to order history.
Ranking as of November 2024
Derivation MethodRank | Company | Click Share |
---|---|---|
1 | Valhalla Scientific Inc. |
12.5%
|
2 | Amptec Research |
12.1%
|
3 | Tempco Electric Heater Corp. |
12.0%
|
4 | Good Will Instrument Co., Ltd |
11.3%
|
5 | Alpha Electronics Corp. |
11.0%
|
6 | Interworld Highway, LLC |
9.7%
|
7 | FLUKE Corporation |
9.0%
|
8 | CIRCUTOR |
7.9%
|
9 | Watanabe Electric Industry Co. Ltd. |
4.3%
|
10 | Seaward Electronic Ltd. |
2.3%
|
Derivation Method
The ranking is calculated based on the click share within the ohmmeter page as of November 2024. 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 (%) |
---|---|---|
United States of America | 7 | 30.4% |
Japan | 6 | 26.1% |
Spain | 2 | 8.7% |
Germany | 2 | 8.7% |
Taiwan | 1 | 4.3% |
United Kingdom | 1 | 4.3% |
India | 1 | 4.3% |
France | 1 | 4.3% |
China | 1 | 4.3% |
Czech Republic | 1 | 4.3% |
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