Bently Nevada 991-25-70-01-01 Thrust Transmitter Module

Product Overview

The Bently Nevada 991-25-70-01-01 is a robust thrust transmitter engineered for continuous axial position monitoring.
It belongs to the proven 991 series, which is widely deployed in critical rotating machinery worldwide.
Moreover, this transmitter converts precise thrust measurements into stable signals for control and diagnostics.
Its stainless steel construction and wide temperature tolerance ensure dependable performance in demanding industrial environments.

Key Features and Functional Highlights

First, the ±25 mils full-scale range supports accurate thrust monitoring for most turbine and compressor applications.
In addition, the two-wire loop-powered design simplifies wiring and reduces installation complexity in existing systems.
Moreover, DIN-rail mounting allows fast integration inside control cabinets or machinery monitoring panels.
Therefore, users benefit from lower commissioning time and consistent signal quality over long operating periods.

Technical Specifications

Model: 991-25-70-01-01
Manufacturer: Bently Nevada
Product Type: Thrust Transmitter, 2-wire loop-powered
Full-scale Range: ±25 mils (25-0-25 mils)
System Cable Length: 7.0 m (23.0 ft)
Mounting: 35 mm DIN-rail clips
Output Signal: Proportional loop-powered transmitter signal
Operating Temperature: -35°C to +85°C (-31°F to +185°F)
Storage Temperature: -51°C to +100°C (-60°F to +212°F)
Housing Material: AISI 303 / 304 stainless steel
Transducer Tip Material: Polyphenylene sulfide (PPS)
Cable Type: 75 Ω coaxial, FEP insulated
Optional Armor: AISI 302 stainless steel with FEP jacket
Approval: CSA Division 2
Weight: 0.95 lb

Typical Applications and System Integration

This thrust transmitter is commonly applied on steam turbines, gas turbines, compressors, and large pumps.
For instance, it integrates seamlessly with Bently Nevada proximity probes and machinery protection systems.
Moreover, the transmitter interfaces easily with PLC, DCS, and condition monitoring platforms.
Therefore, it supports both machinery protection strategies and predictive maintenance programs.

Reliability, Support, and Service

Bently Nevada designs the 991 series using decades of field experience in critical asset monitoring.
In addition, rugged materials resist vibration, temperature extremes, and long-term mechanical stress.
Therefore, maintenance requirements remain minimal while measurement stability stays consistent over time.

FAQ

Q1: What is the primary function of the 991-25-70-01-01 thrust transmitter?
A1: It measures axial shaft position and converts thrust movement into a reliable monitoring signal.

Q2: Can this transmitter operate in hazardous environments?
A2: Yes, it carries CSA Division 2 approval for use in classified industrial areas.

Q3: Is the transmitter compatible with standard control systems?
A3: It connects easily to PLC and DCS systems using its loop-powered transmitter output.

Q4: What industries typically use this model?
A4: Power generation, oil and gas, petrochemical, and heavy industrial rotating machinery applications.