991-01-XX-01-CN Thrust Transmitter

Overview

Place of Origin:	USA
Brand Name:	Bently Nevada
Model Number:	991-01-XX-01-CN
Packaging Details:	Original new Factory Sealed
Delivery Time:	5-7 days
Payment Terms:	T/T
Supply Ability:	In stock

Quick Detail

Description

The 991-01-XX-01-CN Thrust Transmitter delivers a 4–20 mA proportional axial displacement signal for centrifugal air compressors, small pumps, motors, and fans. Accepting a 3300 NSv Proximity Probe with extension cables up to 7 meters, 991-01-XX-01-CN measures full-scale shaft movement from -0.6 to 0.6 mm and a linear Prox Out range of 0.25–1.65 mm (10–65 mils) with 10 kΩ output impedance calibrated for a 10 MΩ load. The loop-powered two-wire design operates at +12 to +35 Vdc with typical 23 mA current and supports a maximum loop resistance of 1,000 Ω. Integrated Proximitor Sensor, non-interacting zero and span potentiometers, and a Test Input pin allow quick loop verification. Power-up Inhibit and Not OK/Signal Defeat circuits prevent incorrect signals due to line transients or probe faults. Mounting is simplified with 35 mm DIN rail clips or bulkhead screws, and potted construction enables operation from -35°C to +85°C and storage from -51°C to +100°C. Approved for CSA Division 2, ATEX Zone 0/2, and ABS maritime use, 991-01-XX-01-CN provides precise automated axial displacement measurement for industrial machinery control systems.

Applications

Petrochemical and refining plants: In areas with explosive gases (such as hydrocracking and ethylene plants), monitor minute displacements of centrifugal compressor shafts to prevent catastrophic rotor-stator collisions.

Large fertilizer plants: Used for continuous displacement monitoring of bearings in syngas compressors and air separation units to ensure the mechanical stability of the units under full load.

Natural gas booster stations: Used for remote monitoring of the thrust bearing status of long-distance pipeline drive units; signals can be directly connected to mainstream domestic DCS/PLC systems.

Centrifuges and large industrial pumps: In industries such as pharmaceuticals and papermaking, monitor the axial positioning of high-speed rotating machinery to prevent mechanical seal failure due to excessive axial movement.

Specifications

Competitive Advantage

Fast Loop Verification
The Test Input pin allows 991-01-XX-01-CN to simulate signals for quick loop output confirmation, reducing setup and commissioning time.

Prevent Fault Signals
Power-up Inhibit and Not OK/Signal Defeat circuits prevent high outputs or false signals from a faulty probe, protecting control systems from incorrect readings.

Flexible Mounting Options
DIN rail clips or bulkhead screws allow 991-01-XX-01-CN to be installed in tight machinery areas with minimal clearance, supporting compact industrial layouts.

Wide Operating Temperature Range
Potted construction permits operation from -35°C to +85°C and storage up to +100°C, enabling 991-01-XX-01-CN to deliver continuous axial displacement measurement in harsh environments.