Where It Excels in Industrial Use

• Advanced Thrust Position Monitoring for Rotating Equipment
The Bently Nevada 991-25-XX-01-CN Thrust Transmitter is designed for continuous axial position measurement on critical rotating machinery, including steam turbines, centrifugal compressors, pumps, and large industrial motors. It converts proximity probe displacement signals into a stable 4–20 mA output for reliable machinery protection and control integration.

• Flexible OEM Machinery Applications
Built for OEM equipment packages, this transmitter provides a compact monitoring solution with integrated signal conditioning, helping reduce additional hardware requirements and simplifying machinery protection system design.

• Plant Automation and Condition Monitoring Systems
The standard analog output allows direct connection to PLC, DCS, and SCADA platforms, making it suitable for predictive maintenance programs and continuous equipment health monitoring.

• Certified Industrial Installations in China
The CN configuration supports China-specific approval requirements, providing installation flexibility for industrial facilities operating under regional certification standards.

Key Strengths at a Glance

• 25-0-25 mil Measurement Capability
Configured for the 25 mil class axial position measurement range, providing accurate monitoring of thrust movement and bearing-related shaft displacement.

• Compatible with 3300 NSv Proximity Probe Systems
Accepts signals from Bently Nevada 3300 NSv proximity probes and extension cable assemblies, delivering stable and repeatable axial position measurements.

• 35 mm DIN Rail Mounting Design
The -01 mounting option uses DIN rail clips, allowing convenient installation inside control cabinets and OEM panels.

• Integrated Proximitor Signal Conditioning
Combines transmitter electronics and signal conditioning in one compact unit, reducing wiring complexity while maintaining reliable measurement performance. 

Technical FAQs

1. What is the main function of the Bently Nevada 991-25-XX-01-CN?
It measures shaft axial displacement and converts the measurement into a 4–20 mA output signal for machinery monitoring systems.

2. Which type of sensor is used with this transmitter?
It is designed to operate with Bently Nevada 3300 NSv non-contacting proximity probes and compatible extension cables.

3. What does the "25" option represent in this model series?
The 25 option identifies the transmitter version designed for the 25-0-25 mil axial measurement range.

4. Does the transmitter require an external Proximitor Sensor?
No. The 991 series integrates the required signal conditioning electronics within the transmitter assembly.

5. What output signal does the transmitter provide?
It provides a two-wire loop-powered 4–20 mA analog output proportional to measured thrust position.

6. Can this transmitter be connected directly to a PLC or DCS?
Yes. The standard current output is designed for direct integration with industrial control systems.

7. What is the purpose of the proximity probe input?
The input receives displacement information from the proximity probe system and converts it into a conditioned thrust position signal.

8. What does the CN suffix indicate?
The CN suffix identifies the China-specific approval configuration of the transmitter.

9. What types of machinery commonly use this transmitter?
It is commonly applied on compressors, turbines, pumps, motors, and other rotating machines requiring axial position protection.

10. How does this transmitter support predictive maintenance?
By continuously tracking shaft thrust movement, it helps identify abnormal operating conditions before they develop into serious mechanical failures.