5 Electromagnetic Field (EMF) Meter Manufacturers in 2022
This section provides overview, applications, and principles of electromagnetic field (emf) meters. Also, please take a look at the list of 5 electromagnetic field (emf) meter manufacturers and their company rankings.
Table of Contents
What Is a Field Strength Meter?
A field strength meter is an instrument used to measure electric fields.
It is mainly used to measure the radio wave strength of radios and televisions, as well as the radio waves generated by electronic devices.
In recent years, many electronic devices that emit radio waves have come into use. The need for field strength meters that can accurately measure electric field strength is rising due to the increasing risk of radio interference between electronic devices and the effects of radio waves on the human body.
Uses of Field Strength Meters
Because field strength meters can measure the strength of radio waves, they are used to investigate the installation location of devices that receive radio waves and to inspect the safety of devices that output radio waves.
The former is used to survey the installation of antennas for receiving TV broadcasts, and to investigate when there are reception problems with TV broadcasts. The latter is used to examine radio interference from devices that generate radio waves and to reduce the risk of radio wave effects on the human body in accordance with the Guidelines for the Protection of Biological Safety of Electromagnetic Fields and the Guidelines for the Protection of the Human Body in the Use of Radio Waves.
Principle of Field Strength Meters
The measurement method of a field strength meter differs depending on the application.
To simply measure the radio wave strength in a space, the electric field probe is pointed at the device to be measured, but to examine the radio wave absorption efficiency of the human body, a device called a phantom must be inserted between the device to be measured and the electric field probe.
The phantom has the same electrical characteristics as the human body.
The field probe of an electric field strength meter consists of an optical fiber, an EO crystal, and a glass tube that covers the optical fiber.
In the absence of an electric field, the input light passes through the optical fiber and is reflected by the EO crystal. It then passes through the optical fiber again and is output.
In the presence of an electric charge, the EO crystal changes the refractive index of the light, so the output light has a different refractive index than the input light.
The changed light is converted into intensity information by the analyzer, which is then observed to measure the electric field in the field strength meter.
List of 5 Electromagnetic Field (EMF) Meter Manufacturers
*Including some distributors, etc.
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PCE Instruments
Electromagnetic field meter
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Electromagnetic Field (EMF) Meter Manufacturer Ranking
*Including some distributors, etc.Number of Employees
Newly Established Company
- PCE Instruments: 1999 (24 years ago)
- Wavecontrol: 1997 (26 years ago)
- Tulsat: 1985 (38 years ago)
Company with a History
- Chauvin Arnoux Metrix: 1905 (118 years ago)
- Televes: 1958 (65 years ago)
- Tulsat: 1985 (38 years ago)
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