What is the difference between a pressure sensor, pressure transducer, pressure transmitter, pressure switch, and digital pressure gauge?
Please note that these terms are often interchanged without regard to the meaning below, and that the exact definitions may differ from source to source. AST uses these general definitions. • Pressure Sensors Millivolt (mV) output signal (also a general term for all pressure types); a device that measures pressure. The millivolt output signal can typically be used ten (10) to (20) feet away from the electronics without significant signal loss. • Pressure Transducers High level voltage or frequency output signal including 0.5 to 4.5V ratiometric (output signal is proportional to the supply) and 1-5V. These output signals should be used within twenty (20) feet of the electronics. • Pressure Transmitters Current output signal, i.e. 4-20mA (4 to 20mA); the current is measured on the device, rather than the voltage; all AST pressure transmitters are two wire devices (red for supply. black for the ground). 4-20mA pressure transmitters offer good electrical noise immunity (EMI/RFI). • Pressur
