High-frequency pressure sensor output signal – ifm

Create Date: 2024-8-30 12:03:23|Source: IFM/ifm

The conversion of the pressure to the electrical signal is done by the physical deformation of the strain gauge, and the strain gauge is bonded to the diaphragm of the pressure sensor and wired into a Wheatstone bridge structure. The pressure exerted on a high-frequency pressure sensor causes the diaphragm to flex, which causes the strain gauge to strain. The strain will change the resistance that occurs with the pressure into shares.

High-frequency pressure sensor output signal – ifm

Millivolt output

Sensors with millivolt output are usually more economical pressure sensors. The output of the millivolt sensor is nominally about 30mV. The actual output is proportional to the input power or encouragement of the high-frequency pressure sensor. If the encouragement is shaken, the output will also change.

Because of this dependence on the encouragement level, regulated power supplies are advocated for millivolt sensors. Because the output signal is weak, the sensor should not be placed in an electrically noisy environment. A relatively short distance should also be maintained between the sensor and the secondary instrument.

Voltage output

The voltage output sensor has an integral signal conditioning function, allowing it to produce a higher output than a millivolt sensor. The output is usually 0-5VDC or 0-10VDC. The output of the sensor is usually not a direct function of the power supply, which means that the regulated power supply only needs to fall within the specified power supply range.

Because of their high output levels, these sensors are not as easily affected by electrical noise as millivolt sensors, allowing them to be used in more industrial environments.

4-20mA output

This type of output sensor is also known as a pressure transmitter. Because 4-20mA signals are minimally affected by electrical noise and resistance, they are best used when signals need to be transmitted over long distances. In applications with a connection length of more than 300 meters, only sensors with this type of output can be used.

Extended: Signs of overload of high-frequency pressure sensors:

A common sign of sensor overload is an offset from the zero point reading, which is usually added. It may read 5-6 mA, or even higher, or even full, with a maximum of about 24 mA.

In summary, the mV output should be the primary consideration for the use of higher temperatures. For industrial environments where unregulated power supplies may be used, the voltage output is sufficient; For applications that require signal transmission over long distances, 4-20mA transmitters are ideal.

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