What's the difference between the pressure sensors, the pressure switches, the pressure relays and the three components?
A pressure sensor mainly produces a small change in the current or voltage output depending on the size of the pressure. Often need to use with external amplifier circuit to complete from pressure detection, control, display and other processes;The pressure switch is a function switch that automatically turns on or off when the set value is reached according to the size of the set pressure;Pressure relay, in fact, compared with the pressure switch, the difference is not large, mainly to provide more output nodes or node types.Both the pressure switch and the pressure relay can be used directly, but the pressure sensor needs more electronic circuit support before it can be used.
Pressure sensor, the pressure signal is converted to analog or digital signals for post processing, can also be converted to standard signals, 4~20mA transmitter signals for remote transmission.Pressure switches and pressure relays can switch on or off only at greater than a given pressure,
The pressure switch and the pressure relay are the on-off outputs!The pressure sensor is analog signal output!
