Research And Insight

Pressure transmitter

Measuring and transmitting pressure plays a key role in system monitoring and controlling pumps/fans in order to achieve a required pressure at any given time.

A pressure transmitter sends a measured pressure as an analogue 0/4-20 mA signal to a receiver. The pressure transmitter has a piezoelectric element, which generates an electric signal which is proportional to pressure.

The receiver

The receiver is typically an electronic regulator or PLC (Programmable Logic Controller). A PLC is a small computer that is not normally able to directly measure electrical signals from a sensor.

If the piezoelectric element is connected directly to the receiver, the resistance in the wire between the two components is also measured and will give a false reading. The bias is dependent on the length of the wire and the ambient temperature.

Use

Pressure transmitters are used to avoid voltage loss or when a regulator or PLC cannot directly measure the signal from a resistance sensor.

Pressure transmitters integrate fully with Grundfos pressure sensor measurement and control solutions.

Related products

Find products from Grundfos related to this subject.

Related applications

Find applications from Grundfos related to this subject.