What is a Pressure Transmitter
Pressure Transmitters, a sub-group of pressure transducers, feature additional reset and calibration options. With some sensor types it is possible, for example, to re-set the measuring span over large ranges. This calibration option is usually referred to by such terms as ”scale down”, ”span reset” or ”turn down”. For instance, a transmitter with a measuring range of 0 to 400 psi and a range reset 1/10 can be calibrate to a measuring range of 0 - 40 psi while still giving a full output signal (4 - 20 mA, for example).
It is also possible to shift the zero point over a wide range and to calibrate the damping of the output signal between 0 and 32 seconds. Smart transmitters such as Hartreg;, which also have logging capabilities, can be calibrated, tested and reset via the control desk or hand terminals.
Transmitters are often used in process applications where they can be combined with various chemical seals.
Explosion-proof pressure transmitter 4-20ma, RS485
Ultra-small diffusion silicon pressure transmitter NY50 series digital pressure sensing
Universal Pressure Transmitter NY40 Series Pressure Switch Sensor
How a Pressure Transmitter Works
There are over 50 types of pressure transmitters that all work differently. Therefore, it is difficult to describe how all of them work within the confines of this article. For example, pressure transmitters that measure high speed changes in pressure depend on piezoelectric materials / materials that are capable of converting mechanical force in the form of pressure into an electric current. Gauge pressure sensors, on the other hand, rely on pure air pressure to move an actual meter and can be calibrated to a specific atmospheric pressure.
Applications
Pressure transmitters are used in a wide variety of applications. They are used in machinery to warn machine operators of high pressure levels before a disaster takes place. Pressure transmitters also ensure that machines do not apply too much or too little pressure during production. Pressure transmitters can be used in conjunction with other devices to measure depth, altitude, water flow, and even pressure loss in order to prevent leaks in a system.
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