I'm trying to learn about pressure transducers and I've learned a tiny bit on the web, but not found it as fruitful as I had hoped. (Or I just don't understand what to look for.)
Do they permit air to pass through them, or only into them, like a pressure tank?
Is their output linear with pressure throughout its rated range? If the transducer is good from 0-30 psi, then does the output range from something like 0 to 30 volts? When their max rated pressure is reached and then exceeded, does the output stop changing? Is it accurate to say the transducer is saturated?
Would the power supply in this example need to be 30 volts? Does the supply need to be steady? If the supply fluctuates, does that throw off the measurement? If the supply is noisy DC, does this throw off the measurement?
It seems like they are always zero to X psi rating. Can the same transducer measure vaccuum too? If I want to guage -20 psi up to 40 psi, can this be done with a single transducer? If not, is there a such thing as using two transducers to measure this range and to install one of them backwards?
Thank you.