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Electromagnetic Field Meter

Electromagnetic field meter used in laboratory

1. What is electromagnetic field meter?
    1.1 Working principle of electromagnetic field meter
    1.2 Feature of electromagnetic field meter
    1.3 Application of electromagnetic field meter
2. How to choose the right electromagnetic field meter?
    2.1 Emf meter
3. Use of electromagnetic field meter
    3.1 Calibration of the electromagnetic field meter
4. How to buy electromagnetic field meter?

What is electromagnetic field meter?

Electromagnetic field meter (Gauss meter) is used to reliably and quickly measure the electromagnetic radiation emitted by power lines, home appliances, and industrial equipment. Gaussmeter, also known as Gaussmeter milliTesla meter, is an instrument made according to the Hall effect to measure the intensity of magnetic induction. It measures an object's static or dynamic (AC) magnetic induction at a point in space, by a Hall sensor (fluxgate sensors are available for higher accuracy). The magnetic lines of force passing through the object produce a current voltage, and the magnetic induction is displayed on the main device.

The emf meter has 3 wide ranges, 20mTesla, 200mTesla, 2000mTesla. The emf detector is used to detect electromagnetic radiation emitted by electrical wiring, computer monitors, televisions, video equipment, and other devices.

Working principle of electromagnetic field meter

The electromagnetic field meter (also known as the Gauss meter) consists of a Hall probe and a measuring instrument. The Hall probe generates Hall voltage in the magnetic field due to the Hall effect, and after measuring the Hall voltage, the magnitude of magnetic induction can be determined according to the Hall voltage formula and the known Hall coefficient. The emf meter readings are in gauss or kilogauss. Electromagnetic field detector is a precision instrument used to measure and display the average magnetic flux density or magnetic induction intensity per unit area.

The electromagnetic field meter is based on the Hall effect principle for magnetic field measurement, using Hall sensors as the magnetic sensing element. Users may find the problem that using different types of probes will produce different measurement results even at the same point. This is not a measurement error, but a result of the different dimensions of the Hall sensors and the positional errors in the assembly. It is especially important to choose the correct emf meter and the corresponding Hall probe according to different needs.

Feature of electromagnetic field meter

A. Sensitive and high precision, longer life span

Electromagnetic field meter adopts high standard radial Hall probe, selected new generation chip processor and algorithm principle. The measurement range is larger, can measure the magnetic field strength 0~24000Gs; measurement speed is faster, 0.2 seconds response; low power consumption processor, longer life span.

B. Multi-level accuracy to meet different use requirements

The resolution of electromagnetic field meter can reach up to 0.1Gs, and the accuracy is generally available in level 1, level 2, and level 5 to meet different usage requirements.

C. Peak measurement mode to easily find the strongest magnetic field

The peak measurement mode of the electromagnetic field meter automatically captures the strongest magnetic field during pulse changes and records and locks the value.

D. Limit value setting, automatic beeping alarm for exceeding the limit

The electromagnetic field meter supports setting the upper and lower limits of the north and south poles respectively, and when the measurement value exceeds the limit range, the instrument will automatically beep with an alarm.

E. Detailed process design, giving you a comfortable use experience

The electromagnetic field meter can automatically switch the range according to the current measurement value and display the magnetic field scale bar. You can also switch the magnetic field strength unit and interface display language by yourself as needed.

The emf meter's probe is about 1 meter long, which is suitable for small space measurement; the screen backlight design, so the dark environment can also be easily read; both sides of the non-slip strip design, so hold more comfortably.

F. Easy to operate, smooth to use

In use, first, connect the Hall probe to the host computer, and then place the Hall probe in the magnetic field to be measured. After the value is stable, the measured value can be read.

Application of electromagnetic field meter

The electromagnetic field meter is specially designed for the determination of the magnetic field strength on the surface of magnetic materials. It has a wide range of applications, including the determination of magnetic beam density of magnetic gas application products; the determination of residual magnetic gas after processing of mechanical parts; the determination of magnetic force of magnetic materials; the determination of residual magnetic gas after processing of stainless-steel materials; the determination of magnetic beam density of motors; the determination of natural magnetism of various kinds of steel. Emf meter has the characteristics of high range and high precision and is easy and fast to operate.

The application areas of the emf detector are as follows.

a. Measurement of permanent magnetic materials

b. Measurement of remanent magnetism of mechanical parts

c. Working magnetic field of magnetic separator

d. Loudspeaker measurement

e. Iron remover measurement

f. DC motor measurement

How to choose the right electromagnetic field meter?


Emf meter

The selection of an electromagnetic field meter should first start with the measurement object, and consider the following aspects.

A. Magnetic field type

The magnetic field is divided into two types: DC magnetic field and AC magnetic field, and the magnetic field strength of permanent magnet materials should be measured by a DC gauss meter.

B. Instrument range

Define the approximate magnetic field range of the object to be measured. Select the range of the instrument that should be greater than the measured magnetic field.

C. Measurement accuracy

Measurement accuracy is the resolution of the instrument, such as the resolution is 1Gs or 0.1Gs, etc.

D. Probe selection

Typically, instrument manufacturers have a wide range of test probes available to meet a variety of testing requirements. Measurement of surface magnetic field strength usually does not need to consider the probe specifications.

a. Air gap magnetic field measurements should consider the size of the probe. If the size of the probe is larger than the measured air gap, it cannot enter the measured air gap, thus leading to unusable.

b. Probe direction selection. Probe direction is divided into two kinds of transverse and axial. In the probe selection, the user should be based on the object to be measured, so as to consider the selection of the adapted probe.

c. Probe connection cable. The length of the instrument manufacturer's probe cable is usually fixed. If there are special measurement requirements. If there is a need to extend or shorten the probe line, should be proposed to the manufacturer.

d. Power supply mode. Desktop Gauss meter usually uses an AC 220V power supply, while the portable Gauss meter uses battery power.

E. Function selection

a. Conventional functions, such as polarity judgment, maximum value lock, etc.

b. Portability. For outdoor operation or on-site measurement, you can choose the portable palm Gauss meter (portable), which is small in size, light in weight and battery-powered.

c. Quick measurement of production line. The instrument has upper and lower limit setting and alarm function.

d. AC magnetic field measurements are used to measure the magnitude of alternating magnetic field strength at low frequencies ( 1Hz - 10kHz ).

Use of electromagnetic field meter

a. Turn the "Off/Range" switch to the appropriate position, select the maximum gear for unknown measurement cases, and then lower it to obtain the highest accuracy. Due to the electromagnetic interference of the environment, it is normal for the meter to show a small value before measurement.

b. Slowly move the meter in your hand toward the object being measured until it touches the object. Note that the reading increases as you move.

c. Point the meter at different angles to the object to be measured and observe the change in the reading.

d. Try different angles of measurement and record the maximum value. If the power of the test object is turned off during the measurement, the tester reading will return to "0".

e. The meter measures in microTesla, if you want to know the value of mili Gauss, please multiply the reading by "10".

f. It is recommended to periodically check the electromagnetic radiation inside and outside your room, and relocate the environment if you find any strong radiation spots.

g. Battery replacement when "LO BAT" is displayed in the upper left corner of the LCD, it means that the battery voltage is between 6.5V~7.5V, then the battery needs to be replaced. However, the battery can still be used for several hours after that. Remove the back cover of the battery and replace it with a new 9V battery. Put the cover back on.

Calibration of the electromagnetic field meter

Place the Hall head in the standard magnetic field and adjust the "calibration" potentiometer on the back of the instrument with a screwdriver to know the same value as the standard magnetic field.

Note: The Hall head substrate scale is oriented perpendicular to the measurement plane when measuring against itself.

How to buy electromagnetic field meter?

ANTITECK provide lab equipment, lab consumable, manufacturing equipment in life sciences sector.
If you are interested in our electromagnetic field meter or have any questions, please write an e-mail to, we will reply to you as soon as possible.

    AntiTeck Life Sciences Limited

    A1-519, XingGang GuoJi, Yingbin Road, Huadu, Guangzhou, China, 510810
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