Okay.. You aren't clear on how the transducers "stop working" so I will offer on both.

You need to make sure that your supply voltage is not exceeding 30V.  If voltage spikes are occurring and you are pressing the limits this would take out a thinfilm sensor quickly.

Perhaps solenoids are being run on the same supply voltage,(a bad idea), and they are spiking the supply.


My suspicion is that you are nailing the sensors with a pressure spike.  The spike can be vastly faster than any gauge you have.  Also you can have you sensor mounted 'just so', so that pressure spikes are maximized for your sensor.  Say the end of a long pipe that is 'tuned' such that reflections etc, hammer the sensor.  Another is oscillations that are like ringing, that cycles the gauge element rapidly bringing dynamic forces to destructive levels.   This can be caused by things like the metal plates suddenly penetrating the wood after a pressure buildup in the normal course of events.  Or a valve closing with no shock absorbing accumulator.

Without a doubt the first thing I would do is add protection to the sensor.  They are called Pressure Snubbers and are used on gauges and transducers all the time. Multi-stage pumps

2011-07-25

Back