There are two ways to accomplish this. One involves a piston gauge or a deadweight tester being used as the reference standard, while the other uses a precision barometer as the reference to set the zero. Another technique, which uses significantly less setup time and cost, is taking a precision barometer and using it as a reference standard to zero absolute transducers.
Continuous output readings benefit users that want to easily integrate pressure transducers into their larger system, monitor measurements around the clock or customize their readings to include output frequency, temperature data or the uncertainty at each pressure point.
A pressure transducer will turn pressure into an electrical signal while a pressure sensor only measures pressure.