Where It Excels in Industrial Use

• Continuous Axial Shaft Position Monitoring
The Bently Nevada 991-25-70-01-CN Thrust Transmitter is designed for continuous monitoring of shaft axial displacement in compressors, turbines, pumps, motors, and fans. It converts proximity probe signals into a precise 4–20 mA output for machinery protection and process automation systems.

• Compact OEM Machinery Packages
Its integrated Proximitor electronics eliminate the need for a separate signal conditioner, making it an excellent choice for OEM equipment with limited installation space.

• Industrial Control System Integration
Compatible with PLC, DCS, and SCADA platforms, the transmitter provides stable axial position data for predictive maintenance, equipment diagnostics, and machine protection.

• Hazardous Industrial Environments
The CN configuration supports China NEPSI certification, making it suitable for industrial applications that require regional hazardous-area compliance while maintaining dependable measurement performance. 

Key Strengths at a Glance

• 25-0-25 mil Measurement Range
Configured for a full-scale axial displacement range of 25-0-25 mils, providing accurate thrust position monitoring for critical rotating machinery.

• 7-Meter Transducer System Compatibility
Designed for operation with compatible 3300 NSv 7-meter proximity probe systems, ensuring stable and repeatable measurement accuracy.

• 35 mm DIN Rail Mounting
The -01 configuration includes mounting hardware for standard 35 mm DIN rail installation, simplifying cabinet integration and maintenance.

• Integrated Signal Conditioning
Features built-in Proximitor electronics, PROX OUT diagnostics, and a two-wire loop-powered design to reduce wiring complexity and improve long-term reliability.

Technical FAQs

1. What is the primary function of the 991-25-70-01-CN Thrust Transmitter?
It continuously measures shaft axial displacement and converts it into a proportional 4–20 mA signal for machinery monitoring and protection systems.

2. Which proximity probe system is compatible with this transmitter?
It is designed for use with compatible Bently Nevada 3300 NSv proximity probes and matching 7-meter extension cable systems.

3. What does the "25" option indicate?
It specifies a full-scale measurement range of 25-0-25 mils for axial shaft position monitoring.

4. Does this transmitter require a separate Proximitor Sensor?
No. The Proximitor electronics are integrated directly into the transmitter enclosure.

5. What output signal does the transmitter provide?
It provides a two-wire, loop-powered 4–20 mA analog output proportional to shaft axial displacement.

6. What is the purpose of the PROX OUT connection?
It provides a buffered vibration and gap voltage signal for diagnostics, troubleshooting, and machinery analysis.

7. Can the transmitter connect directly to a PLC or DCS?
Yes. Its standard 4–20 mA output is designed for direct integration with PLC, DCS, and SCADA systems.

8. What does the CN approval option represent?
The CN option indicates China NEPSI hazardous-area certification for applications requiring regional regulatory compliance.

9. Which types of machinery commonly use this transmitter?
Typical applications include centrifugal compressors, steam turbines, pumps, electric motors, industrial fans, and other rotating equipment requiring thrust monitoring.

10. How does the transmitter improve equipment reliability?
Continuous monitoring of shaft axial movement allows maintenance personnel to detect abnormal thrust conditions early, helping prevent bearing failures and unplanned downtime.