This section provides an overview for voltmeters as well as their applications and principles. Also, please take a look at the list of 41 voltmeter manufacturers and their company rankings. Here are the top-ranked voltmeter companies as of November, 2024: 1.GK Instruments., 2.M.C. Miller Co., Inc., 3.MAHESH ELECTRICAL INSTRUMENTS.
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A voltmeter is a device that measures the voltage between two points to be measured. They are mainly classified into digital and analog voltmeters. Digital voltmeters use an A/D converter to convert the input voltage to a digital value and display it numerically, enabling highly accurate measurements.
Analog voltmeters, on the other hand, are a combination of ammeters and voltage dividers and are characterized by the ability to determine the voltage value from the position of the meter pointer roughly. AC voltmeters usually convert alternating current to direct current using a rectifier circuit and measure and display the voltage. The measurement of distortion waves is less accurate than that of sine waves.
Voltmeters are used in a wide variety of applications, including adjustment and inspection in production lines, monitoring the operating status of various facilities, and measuring temperature and humidity in combination with sensors.
Each model of voltmeter has a defined measurement voltage range, so it is necessary to select the appropriate model according to the purpose of use. Depending on the measurement target, the input impedance of the voltmeters may affect circuit operation, resulting in measurement errors, so careful consideration is required.
It is especially important to clarify the performance requirements of the voltmeters and select voltmeters that meet them, such as voltmeters with measurement accuracy, that is one order of magnitude higher than that required for accurate measurement.
The operating principles of digital voltmeters and analog voltmeters are described below.
Digital voltmeters consist of an input converter, an A/D converter, and a display. The input converter consists of an amplifier and voltage divider to adjust the voltage to be measured between two points to an appropriate voltage within the input voltage range of the A/D converter.
In other words, the amplifier amplifies the measured voltage when it is small and the voltage divider divides the measured voltage when it is high so that the A/D converter can convert it to a digital value with high accuracy. The digital value converted by the A/D converter is displayed as a voltage value on the display after converting the effects of the amplifier and voltage divider.
Since the input impedance of the input converter can be set relatively high, the effect on the circuit to which the voltmeters are connected is small, enabling highly accurate voltage measurement.
Analog voltmeters consist of an ammeter and a voltage divider. When the probes of the voltmeter are connected to two points on either side of the circuit element to be measured, the current is obtained by dividing the voltage between the two points by the sum of the resistance of the voltage divider and the internal resistance of the ammeter flows into the ammeter. The meter pointer will oscillate according to the current value and show the voltage value obtained by multiplying the current value by the sum of the voltage divider resistance and the internal resistance of the ammeter.
The meter pointer can be read visually only about 1% of full scale, which is much less accurate than a digital voltmeter that can measure with an error of 0.1% or less. Ammeters used in analog voltmeters are mainly of the movable coil type using permanent magnets, but the movable iron strip type using electromagnets is also used in some applications. The movable iron strip type has the advantage of being able to measure the RMS value of the alternating current without a rectifier circuit.
Voltmeters must be connected in parallel to the circuit under test to measure voltage. In the case of DC voltage measurement, by placing the Hi terminal probe on the high potential side and the Lo terminal probe on the low potential side, the Hi terminal voltage concerning the Lo terminal potential is displayed. With analog DC voltmeters, connecting the low potential side to the Hi terminal and the high potential side to the Lo terminal will drive the meter in the opposite direction and may break the meter, so be very careful.
On the other hand, when measuring AC voltage, both digital and analog voltmeters convert the voltage to DC voltage via a rectifier circuit, so there is no need to be aware of the Hi and Lo terminals. Analog voltmeters also require attention when measuring high voltages. If a voltage exceeding the measurement range is applied, not only will the meter pointer swing out of alignment, but the meter itself may burn out due to the large current flowing through it, or its fuse may blow, if a fuse is part of the voltmeter.
If the voltage value of the circuit to be measured is unknown, measure at the maximum voltage range to determine the appropriate measurement range, and then switch to that measurement range for a new measurement. Digital voltmeters are designed to withstand high voltages and are equipped with an auto-range function that automatically sets the appropriate range.
*Including some distributors, etc.
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Pearson Electronics, a company established in 1955 and based in Palo Alto, California, manufactures current-monitoring transformers for AC measurements. The company was founded by Dr Paul Pearson, inventor and patent holder of the precision wide-band current transformer. Pearson Current Monitors' products measure complicated transients and periodic signals from a few Hertz to well into the megaHertz region. They also specialize in High Voltage Pulse Transformers used in high-power microwave tubes and Capacitive Voltage Dividers. The company has a Quality Management System that is accredited to ISO 9001:2015.
IET Labs was founded in 1976 and is located in Westbury, New York is a manufacturer of metrology-related instruments for various industries and is the official repair & calibration lab for General Radio service. The company acquired the GenRad standards in 2000 and provides Labs precision test and measurement equipment such as resistors, capacitors, inductors, decade boxes, and, RTD simulators, along with micro-ohmmeters, stroboscopes, sound level meters, voltage dividers, and megohmmeters that have applications in electronics, electrical, audio & visual media, telecommunication, and broadcasting industries.
Fluke Corporation, established in 1948 and based in Everett, Washington, is a manufacturer of precision calibration solutions. The company provides instrumentation and software tailored for electrical, temperature, pressure, flow, and RF measurements. These instruments are commonly utilized in calibration laboratories and process measurement instrument shops globally, including National Metrology Institutes. The companu also offers services and software solutions for assisting organizations in effectively managing assets and operations, with support ranging from individual to enterprise-level integration.
OMEGA Engineering Inc., founded in Norwalk, CT, in 1962 is a manufacturer of products used to measure temperature and humidity, flow and level, and pressure. The company's product portfolio includes thermocouple probes and assemblies, pressure gauges and switches, and air velocity measurement systems, wireless systems and portable optic sensors. The company serves markets including Automotive and Electric Vehicles, Renewable Energy and Energy Storage and Electronics and IT Infrastructure. The company also offers customer services that include support, custom research projects and customized services.
AlphaLab, Inc. is a manufacturer of industrial and scientific measurement devices founded in 1982 and based in Utah, USA. The company’s products are mainly designed for measuring static electricity, electromagnetic fields, and other electrical parameters. These include air ion counters, electrostatic voltmeters for measuring static charge voltages, and gaussmeters. The company also offers OEM, calibration, and technical support for customers with unique project parameters. Its products are mainly used by clients in the research, environmental, and engineering sectors.
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.
Phenix Technologies, Inc., established in 1975 and located in Accident, Maryland, USA, is a manufacturer of current, voltage, and power testing systems as well as components. The company primarily produces AC resonant testing systems for testing gas-insulated switchgear, capacitors, and power cables. It also offers motor testing systems for both no-load and load testing of AC and DC motors. The company’s products are used primarily by clients in the industrial manufacturing and engineering sectors.
Ross Engineering Corporation, founded in 1964 and based in Campbell, California, is a manufacturer of a wide range of high-voltage electronic and electro-mechanical devices and is ISO 9001 certified. It stocks over 25 lines of high voltage devices such as voltmeters, relays, and probes used in several fields such as industrial plants, communication transmitters, and power supplies with ranges from 0.01mV to 1,200,000 V. The company is ISO/IEC 17025:2017 certified and has a calibration lab for testing and calibrating dividers, relays, and probes up to 450kV.
Boonton Electronics, founded in the United States in 1947, is a manufacturer of RF test equipment. It offers a vast catalog of RF and microwave test equipment for various applications, including radar, avionics, electronic warfare, satellite, and wireless communication. The company also provides a range of services that include test, repair, upgrade, and calibration services to ensure accuracy and reliability for clients in the military and commercial sectors, as well as local government officials and community organizations.
Advanced Energy Industries, Inc., founded in 1981 and based in Denver, Colorado, is a manufacturer, distributor, and supplier of precision power conversion, measurement, and control solutions. Its products, include AC-DC power supply units, DC-DC conversion products, and high voltage amplifiers, which are used in mission-critical applications across various industries such as healthcare, telecommunications, and industrial equipment. The company offers on-site support, capable of securing and mounting products, managing electrical connections, and conducting tests as per specifications.
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.
Vitrek Corp, established in 1990 and based in Poway, California, USA, is a manufacturer and supplier of high voltage test and measurement equipment. The company's product range includes Non-Contact Measurement devices, MTI Instruments Accumeasure Capacitance Products, Portable Hand-Held Signal Simulators/Calibrators, and Semiconductor/Solar Metrology Systems. These products are designed for various testing and measurement tasks. They mainly serve the electronic, appliance, medical, aerospace, and semiconductor industries. The company's services include safety and electrical test equipment provisioning, solar and metrology system offerings, vibration/engine balancing system solutions, and high-speed data acquisition.
M.C. Miller Co., Inc. is a well-established manufacturer and distributor of corrosion monitoring equipment and solutions based in the USA. Established in 1945, the company offers a comprehensive range of corrosion monitoring equipment that caters to different sectors. These solutions encompass various tools and devices designed to accurately measure and assess the extent of corrosion on metal surfaces. Their products include reference electrodes, electrical resistance (ER) probes, coupons, and more. These devices provide critical data that helps industries make informed decisions about corrosion protection strategies and maintenance schedules.
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.
Elektronische Bauelemente GmbH (EBG), founded in 1977 and currently a subsidiary of Miba AG, is a manufacturer headquartered in Kirchbach-Zerlach, Austria, specializing in non-inductive thick film resistors for electronics. The company’s product portfolio comprises power resistors and ultra-high power resistors, carbon disc resistors, high-voltage cylindrical resistors, high-voltage flat resistors, and high-precision metal film resistors. Additionally, the company offers voltage dividers and network resistors, and ultra-high precision resistors. Furthermore, the company offers custom individual parts, assemblies, and prototypes. These resistors find applications in various segments of power electronics, including electrification, energy transmission and distribution, as well as industrial machinery and control systems.
Beamex, founded in 1975 in Finland, is a manufacturer and supplier of calibration solutions and services. The company’s comprehensive range of products includes portable calibrators, calibration software, temperature calibration equipment, pressure calibration equipment, and more. These offerings find applications in industries like pharmaceuticals, energy, manufacturing, and food processing. Tasked with enhancing precision and accuracy, Beamex provides convenient calibration solutions that ensure the integrity of measurement processes. With a global existence and an aim for customer satisfaction, Beamex continues to play a vital role in improving measurement accuracy and efficiency across various industries.
Automatismos Control y Programación S.L., founded in 1958 and headquartered in Esplugues Del Llobregat, Barcelona, Spain, is a manufacturer of industrial electronic equipment. The company specializes in customized rugged control boards for any type of industrial application, and its business volume is divided into three blocks: 10% engineering, 60% manufacturing of customized equipment for manufacturers and installers, and the remaining 30% equipment and relays of standard ranges. Its products are used in public works with traffic lights and barriers, in agricultural machinery, and in pharmaceutical production.
Federal Electric, established in 1990 and based in Adapazar, is a manufacturer of marble, natural gas metres, lighting, and low-voltage equipment. The company was founded with all national capital on 40,000 square metres of land, of which 25,000 square metres are covered. The company was the 70th organisation in Turkey to be awarded an ISO 9000 quality certificate, and it was also honoured with a quality award in Belgium. The company offers 3250 items, including current transformers, automated transfer switches, small circuit breaker boxes, surge protection devices, and moulded-case circuit breakers.
Murata Manufacturing Co., Ltd. (Murata Manufacturing) was founded in 1944 and is headquartered in Nagaokakyo, Japan. Murata Manufacturing designs, manufactures, and sells ceramic-based passive electronic components and solutions globally. The company operates through components, modules, and others segments, serving communications, mobility, industrial, healthcare, and personal electronics customers. They company's product offerings include noise suppression products, quartz devices,RFID devices, phase shifters, and wireless connectivity platforms. Services such as webinars and video library are also available for existing and potential customers alike.
LOVATO Electric S.p.A., founded in 1922 and based in Bergamo, Italy, is a manufacturer and designer of low-voltage electrical devices for industrial applications. The company offers a wide range of products such as Motor Protection circuit breakers, Contractors, electromechanical starters and relays, variable speed drives, and soft starters among others. The company holds UNI ISO 45001: 2018, ISO 1400: 2015, and ISO 50001: 2018 certificates. The company’s laboratories are certified to conduct type testing under ACAE control to issue ACAE certifications which are recognized by the European Union and valid across the wold.
ENTES Elektronik, established in 1980 and headquartered in Istanbul, Turkey with additional offices in Germany, Greece, and India, is a manufacturer of power and energy management solutions used in industrial applications. The company’s production line is categorized into power quality and energy, electrical measurement, power factor correction, energy management hardware and software, and current transformers. It also offers protection & control products such as phase failure relays, liquid level controllers, overcurrent monitoring relays, daylight switches, and control & isolating transformers.
Sfere Electric is a manufacturer of electrical application technology products established in 1998 in Wuxi, China. The company produces a wide range of products for electrical safety, electrical monitoring, and power quality management purposes. These include digital power meters, energy storage device control systems, and voltage stabilizers for power supply efficiency. The company also offers cloud services including maintenance, control, and management platforms for large operations. Its products are used by clients in data centers, railway systems, and industrial manufacturing facilities.
Celsa Messgerate-España S.L. was established in 1940 and is a manufacturer of current transformers and measuring equipment based in Moncada, Valencia, Spain. The company offers various products such as current transformers, analogue meters, universal measuring instruments, hour counters, and digital panel meters. The products have been used in various applications such as industrial factories, construction technology, power generation, water supply, and solar panels. The products are manufactured under the compliance of CE and IEC quality standard.
UnidataFC srl was established in 1951 and is a manufacturer of analog instruments, digital instruments, and automatic control systems based in Castellanza, Varese, Italy. The company offers various products in the portofolio, such as MID energy counters, earth leakage relay, voltage transformers, industrial remote controls, and AC current transformers. Various solutions also offered by the company as a service such as flat membrane keyboards, remote control keyboards, and industrial radio controls. The company has passed the certification of ISO 9001 for the qualitative and structural adjustment.
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.
NF Corporation was founded in 1959 and is headquartered in Yokohama, Japan. The company serves automobile, clean energy technologies, aerospace, and digital appliance industries. The ISO 9001 and ISO 14001 certified company combines a vertically integrated approach of development, engineering, manufacturing, sales, and field services. The company’s product segments include function modules, electric measurement instruments, and power supply and control products. The company also builds customized products for customers including EMC testing systems, lithium-ion battery charging and discharge testing systems, and bipolar power amplifiers.
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.
GK Instruments, located in Haryana, India, is a manufacturer and supplier of scientific and laboratory instruments since 2015. With a wide-ranging product portfolio, the company provides an array of offerings such as Physics Instruments, Chemistry Instruments, Laboratory Glassware, School and College Lab Equipment, and Laboratory Plastic Ware. Its products find utility in diverse settings, including educational institutions, schools, colleges, research laboratories, and other organizations that rely on laboratory equipment and instruments for educational, experimental, and scientific purposes.
MAHESH ELECTRICAL INSTRUMENTS is a manufacturer and supplier of electrical measuring instruments based in India. With a history dating back to 1982, the company's product range encompasses various electrical instruments and components, including transformers, electrical motors, and more. One sample product category is electrical motors. The company offers a range of electric motors designed for various applications, including DC Electric Motors, Small DC Electric Motors, Micro DC Electric Motors, and more.
Super Engineering Works is an electrical components manufacturer established in 1982 in Delhi, India. While being specialized in electrical control and signaling devices, the company's product line includes various types of products, including but not limited to Electrical Control & Signalling Devices, CAM Rotary and Toggle Switches, and Industrial Hooters. It offers cutsomization services, making its products present across the Indian continent. Additionally, this business is holds diverse multiple quality standards, such as the ISO 9001:2015, ROHS, and CE certificates.
TOWA ENGINEERING WORKS, based in India, is a manufacturer of panel meters and switchboard instruments since 1975. The company operates with a team of 25 experts and maintains three production lines, allowing them to offer a diverse range of products. The company's product range includes an array of precision instruments and meters, such as voltmeters (analog and digital), ampere meters (analog and digital), digital panel meters, digital frequency meters, counters, scientific instruments, switchboard instruments, and moving iron meters.
Yih Sean Enterprise Co., Ltd., based in Taiwan, is a manufacturer of electrical components since 1981. The company serves over 200 customers worldwide and its comprehensive array of electrical products includes cigarette lighter plugs, sockets, fuse blocks, bus bars, switch panels, and more, each designed to meet the demands of modern automotive, recreational, and marine industries. The company extends to the design and manufacturing of both industrial switches and marine electronics products under the Yis Marine brand. Its product line includes general industrial switches, water-proof marine switches, alarm switches, and more. The company is ISO9001 certified since 2002.
Trumeter, established in 1937 and based in Coconut Creek, Florida, is a manufacturer and supplier of precision measurement instruments. They provide test and measurement equipment such as digital panel meters used to measure electrical and physical quantities. The company is catering to similar industries for accurate testing and measurement, offering industrial controls to automate processes like conveyors, valves, and pumps which are utilized across various industries, including manufacturing, power, telecommunications, and healthcare.
Datcon Industrial Electronic Ltd., established in 1982 and headquartered in Budapest, Hungary, is a manufacturer and distributor of electronic and electric power components. The company's products include AC current and voltage meters, safe-output power supplies, and multifunction power meters. Its products are used in power systems, industrial chemical processing plants, and for powering and controlling other industrial processes. The company is also an official distributor of Vega products and offers customer services, including the calibration of gas pressure test pumps, serving the petrochemicals, waste water, and power supply industries.
Hager Ltd., established in 1955 and headquartered in Blieskastel, Germany, is a manufacturer of electrical installations tailored for use in residential, commercial, and industrial buildings. The company's product range includes meter space systems, distribution systems, switching and protection devices, energy management and monitoring solutions, and cable routing and room connection systems. These products cater to various applications, including energy distribution and metering systems, cable management systems for power and data distribution, and building security systems. The company supplies products from other brands such as Berker, Bocchiotti, Elcom, and E3/DC. It has 22 manufacturing sites in 10 countries worldwide.
R. STAHL AG, established in 1876 and based in Waldenburg, Germany, is a manufacturer and supplier of electrical components, equipment, and systems used in hazardous areas. Some of its products include luminaires, control boxes, CCTV systems, distribution boards, and signaling devices. The products have several applications, including explosion protection for LNG and machine building. The company has subsidiaries in 21 countries and has applied an integrated management system for all its production sites, which brings together three ISO standards for quality management (9001), safety and health (45001), and environmental protection (14001).
Selec Controls, founded in Navi Mumbai, Maharashtra, in 2000 is a manufacturer of Electrical Measurements and Protection, Meters, and, Automatic Power factor controllers. The company's product portfolio includes Indicators and Controllers, Digital Timers, Temperature Controllers, Speed Monitoring Relays and Humidity and Temperature Controllers. The company serves industries such as Oil and Gas, Aerospace and Defense, Automotive and Transportation, Construction, and Power Generation. The company has 200+ distributor network and global sales offices.
Tense Elektronik is a manufacturer and supplier of electronic products and technologies in industrial automation solutions established in Turkey since 2006. The company specializes in automatic control sensors, controllers, energy analyzers, multimeters, frequency meters, ammeters, timers, among others. It serves industrial sectors such as automotive, manufacturing, construction, food and aerospace. The company's products improve operational efficiency, fluid processes in industries and the optimization of production lines and quality control processes. The company has certification in the Iso 9001:2015 Quality Management System, TSE Certificate and RoHS.
PeakTech Prüf- und Messtechnik GmbH, established in 1957 and based in Ahrensburg, Germany, is a manufacturer and supplier of electronic measurement technology. The company's product portfolio includes multimeters, voltage testers, thermal imaging cameras, isolating transformers, and sound level meters, as well as calibrators. These products are applied in various industries, including electrical engineering, environmental monitoring, aviation, telecommunications, and research and development. The company provides customer services, including technical support, repair, service requests, and product development.
DEIF A/S, founded in 1933 and headquartered in Skive, Denmark, is a supplier of safe power control products for decentralized power generation on land and sea. The company offers products such as single genset controllers, protection relays, HMI control panels, and pitch battery chargers. The company's products are used in land power, whitepapers, webinars, wind power, and marine sectors. It has ISO 9001:2015 and ISO 14001:2015 quality management certifications and also offers training, repair, and consultancy services.
Mastervolt is headquartered in Amsterdam, the Netherlands, and is a supplier of autonomous power solutions technology that was established in 1991 as a subsidiary of Navico Group. The company designs and develops products for converting, managing, and storing electrical energy. Its products include a range of solar panels, chargers, and control systems used for automation power control or management operations. It also offers technical support and product maintenance services for customers needing additional assistance. The company's products are mainly used by clients in the marine, industrial, and automobile sectors.
Ranking as of November 2024
Derivation MethodRank | Company | Click Share |
---|---|---|
1 | GK Instruments. |
7.4%
|
2 | M.C. Miller Co., Inc. |
6.9%
|
3 | MAHESH ELECTRICAL INSTRUMENTS |
6.3%
|
4 | Super Engineering Works |
4.8%
|
5 | Ross Engineering Corp. |
4.8%
|
6 | TOWA ENGINEERING WORKS |
4.2%
|
7 | AlphaLab, Inc |
3.7%
|
8 | Pearson Electronics |
3.7%
|
9 | Boonton Electronics |
3.2%
|
10 | Japan Finechem |
3.2%
|
Derivation Method
The ranking is calculated based on the click share within the voltmeter 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 | 13 | 36.1% |
India | 5 | 13.9% |
Japan | 4 | 11.1% |
Spain | 3 | 8.3% |
Turkey | 3 | 8.3% |
Italy | 2 | 5.6% |
Austria | 1 | 2.8% |
Finland | 1 | 2.8% |
China | 1 | 2.8% |
Taiwan | 1 | 2.8% |
Denmark | 1 | 2.8% |
Netherlands | 1 | 2.8% |
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