Product Overview

The Bently Nevada 30780-91-CN is a Proximitor sensor used in 3300 series proximity transducer channels to condition and standardize the signal from an eddy-current proximity probe. In a typical installation, the Proximitor provides a stable, scaled output that represents probe gap and dynamic shaft motion, allowing vibration, displacement, and position measurements to be processed by monitoring racks or control systems.

This part number includes a CN regional designation and is intended for DIN-rail or panel mounting in control cabinets. For correct channel performance, it must be used with the appropriate probe and extension cable combination that matches the intended system length and probe size class.

Important correction to common listing errors

• A Proximitor sensor is not an extension cable. If your application requires a 9 m system length, that requirement is met by the probe + extension cable combination; the Proximitor is the signal conditioner module.

Electrical and Mechanical Characteristics

• Model / Order Number: 30780-91-CN

• Product Type: Proximitor Sensor (signal conditioner)

• Product Family: 3300 series proximity transducer systems

• Mounting Style: DIN-rail / panel cabinet installation (application dependent)

• Intended Function: Provides conditioned output for probe gap and dynamic vibration signals

• Supply Sensitivity (listing data): < 2 mV output change per 1 V input change

• Output Resistance (listing data): 50 Ω

Logistics and commercial data

Industrial Applications

• Shaft vibration and displacement monitoring on turbines, compressors, pumps, and generators using 3300 series proximity channels

• Cabinet-based signal conditioning where probe outputs must be standardized before entering a monitoring rack or control system

• Retrofits and maintenance replacement for existing 3300 series proximity measurement installations

• Installations requiring stable probe gap verification and dynamic signal access for commissioning and troubleshooting