Web gems sensors pressure switches cover a wide range of applications from 2 to 6000 psi (40 mbar to 400 bar) in a variety of types including vacuum, differential, specialty and. Download the gems sensors & controls 3800 pressure transmitter installation instructions bulletin. Web • pressure transducer exhibits an output at zero pressure (large zero offset). Web wiring up a pressure transducer can be a tricky procedure but with the right diagram and the right components, it can be done successfully. Bench testing a 3100 series pressure sensor with 4 20 ma output.