The 991-25-70-01-00 Bently Nevada Sensor Proximity is a robust 2-wire thrust transmitter designed for OEMs of centrifugal compressors and small rotating equipment. It provides a simple 4-20 mA output signal proportional to axial shaft displacement, making Sensors / Switches 991-25-70-01-00 ideal for integration into basic machinery control systems. This loop-powered device accepts input from a 3300 NSv proximity probe, eliminating the need for a separate power supply and simplifying wiring.

A key feature of the Bently Nevada 991/990 Series 991-25-70-01-00 is its integrated Proximitor sensor, which removes the requirement for an external signal conditioner. The unit also provides diagnostic outputs via "PROX OUT" terminals and a coaxial connector, allowing for monitoring of dynamic vibration and gap voltage. Easy calibration is facilitated by non-interacting zero and span potentiometers located under the transmitter's label.

Built for reliability in challenging environments, the 991 Thrust Transmitter Bently Nevada 991-25-70-01-00 offers a potted construction that protects against high humidity, up to 100% condensing. It includes important circuits like Power-up Inhibit to prevent signal errors from voltage transients and a Not OK/Signal Defeat function to avoid false alarms from faulty probes or cabling. This ensures stable and trustworthy operation.

The specific model 991-25-70-01-00 991 Bently Nevada Thrust Transmitter is configured with a ±25 mils measurement range, a 7-meter system cable length, and includes 35 mm DIN-rail clips for straightforward mounting. This combination of features makes it a compact and dependable solution for thrust position monitoring in space-constrained applications.