• Vibration Resistant—The low-mass pilot stage, mechanically damped deflector bar, and rugged construction provide stable performance in vibration.
• Large Diameter Nozzles—Large diameter nozzles, free-flow pilot stage design, and large internal pneumatic supply passages provide excellent tolerance to reducing the effects of contaminant buildup and erosion.
• Increased Accuracy, Reduced Sensitivity to Supply Pressure Variations and Downstream Leakage—The electronic feedback control network monitors the pneumatic output signal, detects any input-output deviations and corrects them. This provides very high accuracy and allows the transducer to sense changes in the final element condition and rapidly optimize its air delivery.
• Easy Maintenance—Major mechanical and electrical components are incorporated into a single field-replaceable "master module". The transducer does not have to be removed from its mounting to facilitate troubleshooting or service. A separate field wiring compartment eases installation and maintenance.
• Quick Diagnostic Checks and Remote Performance Monitoring—With Stroke Port, a constant bleed from the pilot stage vents through a hole in the module cover. Covering the hole increases the transducer output to confirm the proper operation of the pilot and booster stages and stroke the actuator. With optional Remote Pressure Reading, a frequency directly proportional to the output pressure is superimposed on the input signal wires.

Using a 275 HART® Communicator or frequency counter, an operator can monitor the Type 846 output pressure.