Reliability—highly essential, since a transmitter must operate for extended periods in inaccessible places without attention.
The Model 40 Pneumatic Transmitter is designed to sense pressure and transmit an air signal which is precisely proportional to the measured variable. This output signal from the transmitter may be fed to any remotely located monitoring, recording or control instrument.These transmitters ensure increased safety by eliminating the need for piping high-pressure, toxic, corrosive, inflammable or other dangerous fluids or gases through the plant.
They provide an added convenience, in that operation of a single transmitter with its high capacity relay can be used to actuate a number of receivers for indication, recording or control at a number of points throughout a plant. Also, transmitters measuring many different variables provide standard 3-15 psi output signals, thereby reducing all variables to common readout devices and simplifying centralized panelboards and control stations.