The bias relay also amplifies the output of the transducer which allows the zero based units to regulate higher output pressures than the standard T-1500. The zero adjustment causes the nozzle to move relative to the flexure. The span adjustment is a potentiometer that limits the flow of current through the coil. A thermistor circuit in series with the coil provides temperature compensation. This minimizes the number of individual supply air lines required.
Manifolds are available to hold three, five, or ten units.
Each manifold comes with check valves so that a unit can be pulled off of the manifold for service or replacement without affecting the whole manifold.