3500/72M Recip Rod Position Monitor, China 3500/72M Recip Rod Position Monitor Manufacturers, Suppliers, Factory

Overview

Place of Origin:	USA
Brand Name:	Bently Nevada
Model Number:	3500/72M
Packaging Details:	Original new Factory Sealed
Delivery Time:	5-7 days
Payment Terms:	T/T
Supply Ability:	In stock

Quick Detail

Rack Space Monitor	1 full-height front slot
Rack Space I/O Modules	1 full-height rear slot
Operating Temperature (Internal/External Termination Proximitor/Seismic I/O Module)	-30°C to +65°C (-22°F to +149°F)
Operating Temperature (Proximitor/Seismic Internal Barrier I/O Module, Internal Termination)	0°C to +65°C (32°F to +149°F)
Storage Temperature	-40°C to +85°C (-40°F to +185°F)
Humidity	95% non-condensing
Inputs Signal	Accepts from 1 to 4 proximity probe signals
Input Impedance	10 kΩ
Nominal Scale Factor Rod Position	0.79 mV/µm (20 mV/mil), 3.94 mV/µm (100 mV/mil), 7.87 mV/µm (200 mV/mil)
Nominal Scale Factor Rod Position 2	3.94 mV/µm (100 mV/mil), 7.87 mV/µm (200 mV/mil)
Nominal Scale Factor Rod Drop	3.94 mV/µm (100 mV/mil), 7.87 mV/µm (200 mV/mil)
Nominal Scale Factor Hyper Compressor	3.94 mV/µm (100 mV/mil), 7.87 mV/µm (200 mV/mil)
Power Consumption	7.7 watts nominal
Front Panel OK LED	Indicates when the Recip Rod Position Monitor is operating properly
Front Panel TX/RX LED	Indicates when communicating with other 3500 modules
Front Panel Bypass LED	Indicates when the Recip Rod Position Monitor is in Bypass Mode
Signal Conditioning Accuracy Position Magnitude (Direct)	Within ±0.33% of full-scale typical, ±1% maximum
Signal Conditioning Accuracy Gap	Within ±0.33% of full-scale typical, ±1% maximum
Signal Conditioning Accuracy 1X Amplitude	Within ±0.33% of full-scale typical, ±1% maximum
Dimension:	2.5x25.8x24cm
Weight:	0.82kg

Description

The 3500/72M Recip Rod Position Monitor is a 4-channel module designed to measure reciprocating compressor rod motion, rod drop, and hyper-compressor activity. Each 3500/72M channel accepts 1–4 proximity probe signals with 10 kΩ input impedance and conditions them to generate dynamic and static position measurements. Using the 3500 Rack Configuration Software, operators can set alert (1–60 s) and danger (0.1–60 s) thresholds for each measured value to trigger alarms and relays, ensuring automated monitoring of essential reciprocating machinery. The 3500/72M delivers nominal scale factors for rod position from 0.79–7.87 mV/µm, rod drop 3.94–7.87 mV/µm, and hyper-compressor 3.94–7.87 mV/µm. Signal conditioning accuracy is within ±0.33% full scale for direct position and amplitude measurements, and ±1° for rod position angles. The module operates at 7.7 W nominal, fits 1 front and 1 rear full-height rack slot, supports temperatures from -30°C to +65°C, and provides LEDs for OK, TX/RX, and Bypass status. With high-frequency response up to 600 Hz and precision notch filtering, the 3500/72M integrates seamlessly into automated compressor control and monitoring systems.

Applications

Measure Rod Motion using the 3500/72M to track reciprocating compressor rod position with scale factors from 0.79–7.87 mV/µm, enabling operators to detect abnormal rod travel in real time.

Detect Rod Drop with the 3500/72M by monitoring signals at 3.94–7.87 mV/µm to identify excessive rod clearance and prevent mechanical wear.

Analyze Hyper-Compressor Activity using the 3500/72M (3.94–7.87 mV/µm) to observe high-frequency rod motion and ensure proper compressor operation.

Trigger Automated Alarms with the 3500/72M using configurable alert (1–60 s) and danger (0.1–60 s) thresholds to notify operators of abnormal rod behavior or hyper-compressor events.

Provide Recorder Outputs through the 3500/72M to integrate measured values with SCADA or DCS systems for continuous performance monitoring.

Specifications

Signal Conditioning Accuracy 2X Amplitude	Within ±0.33% of full-scale typical, ±1% maximum
Signal Conditioning Accuracy Pk-Pk Amplitude	Within ±0.33% of full-scale typical, ±1% maximum
Signal Conditioning Accuracy Not 1X Amplitude	Within ±3.0% of full scale typical
Signal Conditioning Accuracy Position Crank Angle	Within ±1° typical, ±3° maximum
Signal Conditioning Accuracy Rod Position Angle (Paired Only)	Within ±1° typical, ±3° maximum
Hyper Channels Frequency Response Peak-Peak Filter	Fixed 1 Hz to 600 Hz
Hyper Channels Frequency Response Gap Filter	-3 dB at 0.09 Hz
Hyper Channels Frequency Response Not 1X Filter	Constant Q Notch filter, minimum rejection 34.9 dB over 60 cpm to 15.8× running speed
Hyper Channels Frequency Response 1X Vector Filter	Constant Q filter, minimum rejection 57.7 dB
Hyper Channels Frequency Response 2X Vector Filter	Constant Q filter, minimum rejection 57.7 dB

Competitive Advantage

Enable Accurate Rod Monitoring with the 3500/72M by conditioning proximity probe signals with ±0.33% full-scale accuracy and ±1° rod position angle measurement.

Support Multi-Channel Signal Processing with the 3500/72M, handling 1–4 proximity probe inputs per channel to capture detailed rod dynamics.

Deliver Fast Automation Response using the 3500/72M with high-frequency response up to 600 Hz and constant Q notch filters for precise rod motion detection.

Simplify Installation and Integration with the 3500/72M, fitting 1 front and 1 rear full-height rack slot and operating at 7.7 W nominal power.

Monitor Environmental Limits with the 3500/72M, operating from -30°C to +65°C and withstanding 95% non-condensing humidity for reliable automated measurement.