Description
BENTLY NEVADA 3500/50M Tachometer Monitor
1. Product Description
The BENTLY NEVADA 3500/50M is a high-performance tachometer monitor module designed for critical rotating machinery applications. As part of the 3500 Series, it supports dual-channel input from proximity probes or magnetic sensors to measure shaft speed, rotor acceleration, and rotational direction. With programmable alarm setpoints and real-time data processing, the module ensures precise condition monitoring and early fault detection. Its robust industrial design, EMI/RFI shielding, and compliance with API 670 standards make it ideal for harsh environments in oil & gas, power generation, and manufacturing.
2. Product Parameters
| Parameter | Specification |
|---|---|
| Model | 3500/50M |
| Channels | 2 channels |
| Input Types | Proximity probes (eddy current) or magnetic sensors |
| Speed Range | 0–100,000 RPM |
| Accuracy | ±0.01% of reading |
| Power Supply | 24 Vdc ±10% |
| Communication | Ethernet, Serial (Modbus RTU), CAN |
| Temperature Range | -40°C to +85°C |
| Dimensions | 140 mm × 100 mm × 120 mm |
| Weight | 0.8 kg |
3. Advantages and Features
- Dual-Channel Redundancy: Ensures continuous monitoring even if one channel fails.
- Wide Compatibility: Works with BENTLY NEVADA’s 3300XL sensors and third-party magnetic sensors.
- Solid-State Design: Reduces mechanical wear and downtime compared to legacy electromechanical systems.
- Real-Time Data Processing: Enables instantaneous alarm triggering and trend analysis.
- Remote Configuration: Supports over-the-air updates and diagnostics via BENTLY’s 3500 组态软件.
4. Application Areas and Case Studies
- Oil & Gas: Monitoring pump and compressor speeds in drilling platforms.
- Power Generation: Tracking turbine rotor acceleration in thermal plants.
- Manufacturing: Controlling conveyor belt speeds in automotive assembly lines.
Case Study: A North American refinery reduced unplanned shutdowns by 20% using the 3500/50M to detect overspeed conditions in centrifugal pumps, enabling predictive maintenance and cost savings.

5. Competitor Comparison
The 3500/50M outperforms comparable modules by:
- Offering dual-channel redundancy (vs. single-channel alternatives).
- Supporting higher speed ranges (up to 100,000 RPM vs. 50,000 RPM).
- Including built-in EMI/RFI protection without external filters.
6. Selection Recommendations
- System Complexity: Choose the 3500/50M for multi-axis systems requiring redundancy.
- Environment: Opt for this module in high-vibration or high-temperature settings.
- Integration: Pair with BENTLY’s 3500 Series framework for seamless data aggregation.
7. Precautions
- Sensor Alignment: Ensure proper probe-to-target spacing (0.5–1.5 mm for eddy current sensors).
- Cable Management: Use shielded cables and avoid routing near high-voltage lines.
- Calibration: Perform annual checks to maintain accuracy.
山西鑫业达国际贸易有限公司 specializes in BENTLY NEVADA 3500/50M and automation spare parts. Visit www.xydcontrol.com for sales and technical support.




