Bently Nevada 3500/72 140734-08 Recip Rod Position Monitor

The Bently Nevada 3500/72 140734-08 Recip Rod Position Monitor is a specialized monitoring module designed to provide accurate measurements of rod motion in reciprocating machinery. Part of the 3500 Series Machinery Protection System, it delivers critical information for machinery protection, process optimization, and predictive maintenance.

This monitor measures the displacement of reciprocating rods in compressors and pumps, providing operators with real-time position data. By accurately tracking rod position, the 3500/72 module helps prevent mechanical overtravel, detect misalignment, and monitor overall machine health. Integration with other 3500 Series modules allows for centralized monitoring, alarm management, and system diagnostics.

Product Specifications

Product Applications

The 3500/72 Recip Rod Position Monitor is widely used in industrial applications where reciprocating machinery performance and safety are critical:

• Oil & Gas – Monitoring reciprocating compressors for pipeline and refinery operations.

• Petrochemical – Tracking rod positions in reciprocating pumps and process compressors.

• Power Generation – Ensuring safe rod travel in reciprocating auxiliary pumps and compressors.

• Chemical Processing – Detection of abnormal rod motion in critical process equipment.

• Marine & Offshore – Real-time rod position monitoring on shipboard compressors and pumps.

• Industrial Manufacturing – Preventing overtravel and mechanical damage in reciprocating machinery.

Product Advantages

• High Precision Measurement – ±0.25% full-scale accuracy ensures reliable rod position monitoring.

• Fast Response – <20 ms response time allows for quick detection of abnormal motion.

• Wide Frequency Range – DC to 1 kHz captures slow and fast rod movements.

• Full Signal Isolation – Protects system from electrical noise and ensures measurement integrity.

• Flexible Alarm Options – Configurable overtravel, high/low limits, and windowed alarms for customized protection.

• Seamless Integration – Fully compatible with Bently Nevada 3500 Series systems for centralized monitoring and diagnostics.

• Robust Industrial Design – Built to withstand electrically noisy and harsh operating environments.

• Diagnostic Feedback – Channel status and fault indication for enhanced system reliability.

FAQ

1. What type of sensors does the 3500/72 support?

   Proximity probes or displacement sensors are supported.

2. How many channels are available per module?

   Each module provides 1 channel; multiple modules can be installed for additional monitoring points.

3. What is the measurement range?

   ±50 mm typical, configurable based on the sensor and installation.

4. What is the module’s frequency response?

   DC to 1 kHz.

5. Can it trigger alarms for rod overtravel?

   Yes, configurable overtravel and windowed alarms are supported.

6. Is the input signal isolated from other channels and the backplane?

   Yes, full galvanic isolation is provided.

7. What is the response time of the module?

   Less than 20 ms.

8. How accurate is the rod position measurement?

   ±0.25% of full-scale reading.

9. Does it integrate with the 3500 Series backplane system?

   Yes, it communicates and integrates seamlessly with other 3500 Series modules.

10. Can it operate reliably in electrically noisy industrial environments?

    Yes, it is designed for harsh industrial conditions and maintains signal integrity.