Product Details: Bently Nevada 991-25-50-01-00 is a two-wire loop powered Thrust Transmitter with built-in proximitor circuit, designed to pair with 3300 NSv proximity probe for non-contact axial thrust displacement monitoring of rotating machinery. This Shaft Axial Displacement Transducer converts the gap variation between probe tip and rotor thrust collar into standard 4-20mA analog signal, which can be directly sent to DCS, PLC and plant control systems without additional rack-based monitor modules. According to the ordering code 991-25-50-01-00, this unit has a full measurement range of ±25 mils, supports total transducer system length of 5 meters, and adopts 35mm DIN rail clip mounting with no agency certification required. Powered by 12~35V DC loop supply, the transmitter provides zero and span adjustment potentiometers for on-site calibration. It has built-in transducer fault detection function, which can detect probe open circuit, short circuit and poor connector contact, and output fault current signal to trigger system alarm. The fully potted internal circuit can withstand high humidity and mechanical vibration in industrial environments, and the power-up inhibit function prevents false alarms caused by voltage fluctuation during equipment startup. It also offers buffered raw transducer signal for on-site signal inspection and troubleshooting. Widely used in power generation, petrochemical and heavy industrial fields, this Two-Wire Loop Powered Transmitter monitors small centrifugal compressors, fans and pumps, captures abnormal rotor axial thrust changes at early stage, protects thrust bearings and avoids catastrophic mechanical failure and unplanned equipment shutdown.

Core Attributes:

Brand: Bently Nevada

Model: 991-25-50-01-00

Product Type: Integrated Thrust Transmitter

Measurement Range: ±25 mils (±0.6mm)

Matched Probe: 3300 NSv proximity probe

System Cable Length: 5 meters

Power Supply: 12 ~ 35V DC, two-wire loop power

Mount: 35mm DIN rail clip mount

Features: Integrated proximitor circuit, 4-20mA analog output, buffered transducer signal, built-in transducer fault detection, zero & span adjustable, potted circuit construction