Product Overview
The Bently Nevada 3500/42 (Order Number: 140734-02) is a 4-channel Proximitor and Seismic Monitor designed for the 3500 rack-based machinery protection system. It accepts inputs from proximity probes and seismic transducers to measure radial vibration, thrust position, eccentricity, acceleration, and shaft absolute vibration. The 128240-01 is a standard I/O module (external termination type) that provides the physical connection points for field wiring to the monitor. Together, they form a high-reliability monitoring channel for critical rotating machinery.
Technical Specifications
| Parameter | Value / Description |
|---|---|
| Model | 3500/42 140734-02 (Monitor) + 128240-01 (I/O Module) |
| Type | 4-Channel Proximitor / Seismic Monitor |
| Dimensions (Monitor Module) | Height: 241.3 mm (9.50 in) Width: 24.4 mm (0.96 in) Depth: 99.1 mm (3.90 in) |
| Weight (Monitor Module) | Approximately 0.41 kg (0.90 lb) |
| I/O Module Weight | Approximately 0.23 kg (0.50 lb) |
| Total Weight (Pair) | Approximately 0.64 kg (1.40 lb) |
| Number of Channels | 4 |
| Input Signal Types | Eddy current proximity probes, accelerometers, velocity sensors |
| Outputs | Proportional voltage/current signals, relay alarms, and data via 3500 backplane |
| Power Requirement | Supplied by 3500 rack (typically 7.7 W per module) |
| Alarm Setpoint Accuracy | ±0.13% of full scale |
| Operating Temperature | -30°C to +65°C (-22°F to +149°F) |
Application Scenarios
Steam and Gas Turbine Protection
Monitors shaft relative vibration and thrust bearing position in power generation turbines. Detects unbalance, misalignment, or thrust failure before mechanical damage occurs.Centrifugal and Axial Compressors
Measures high-frequency casing acceleration and shaft vibration in oil & gas refineries or natural gas pipeline stations. Provides early warning of surge, impeller rub, or bearing degradation.Large Electric Motors and Generators
Installed on critical motor bearings in petrochemical or mining operations. Tracks vibration trends and seismic movement to prevent rotor-stator contact or insulation breakdown.Critical Pumps (Boiler Feed, Main Coolant)
Used in power plants or nuclear facilities to monitor pump casing vibration and shaft eccentricity. Triggers shutdown during cavitation or bearing wear.Hydro Turbines and Gearboxes
Monitors low-speed shaft vibration and gear mesh frequencies in hydropower plants. Helps schedule maintenance based on actual mechanical condition rather than time intervals.
Global direct procurement guarantee
All products are purchased directly from overseas original manufacturers or authorized channels, 100% guaranteed genuine quality, sufficient spot inventory, and comprehensive model coverage
Quality Commitment
Each product has been tested by our technicians, providing 12-month long warranty, worry-free after-sales
Flexible procurement plan
- Bulk order enjoys Friendship discount (2 pieces or more can be applied)
- Long-term cooperative customers can apply for priority supply
Full service support
7×24 hours technical consultation, from selection guidance to installation and commissioning to provide full life cycle service (paid)
Why do so many customers choose us?
On the basis of the same quality, we provide:
- More competitive price system
- Faster logistics response
- More complete technical support (free product technical documentation)
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