⚙️ BENTLY NEVADA 18745-04 7200 5/8mm PROXIMITOR® SENSOR
The Bently Nevada 18745-04 7200 is a precision Proximitor® displacement sensor engineered for high-reliability shaft position and vibration monitoring in rotating machinery. Featuring a 5/8 inch (15.88 mm) probe tip, this sensor is optimized for turbines, compressors, generators, and high-speed pumps, providing continuous, accurate feedback for condition monitoring and machinery protection systems. Its rugged design ensures long-term performance in harsh industrial environments, including high temperature, vibration, and EMI-prone areas.
This sensor is a core component of the Bently Nevada 7200 series, known for its stable output, low drift, and compatibility with the 3500 monitoring system and other Bently Nevada analog and digital modules. The 18745-04 model is ideal for detecting subtle shaft displacement, vibration, and misalignment, enabling predictive maintenance and avoiding catastrophic machine failures.
📘 Product Overview
The 18745-04 Proximitor® sensor converts shaft movement into a precise analog signal that reflects radial displacement. Its non-contact eddy-current measurement principle ensures zero wear and high accuracy over extended periods. The sensor operates reliably under industrial conditions with robust housing and EMI-shielded cabling.
Key advantages include:
- High-precision measurement of shaft position
- Non-contact operation for zero mechanical wear
- Fast response suitable for high-speed machines
- Compatible with standard Bently Nevada monitoring racks and signal conditioners
- Reliable operation in high vibration, temperature, and electrically noisy environments
The sensor’s performance ensures that condition monitoring systems can detect shaft vibration, rubs, misalignment, and imbalance early, allowing operators to plan maintenance, reduce downtime, and improve machinery lifespan.
📊 Datasheet Parameters (Technical Specification Table)
| Parameter | Description |
|---|---|
| Model | 18745-04 7200 Proximitor® Sensor |
| Probe Tip Size | 5/8 inch (15.88 mm) |
| Measurement Type | Radial shaft displacement |
| Operating Range | ±0.050 in (±1.27 mm) typical; configurable depending on sensor installation |
| Linearity | ±1% of full scale typical |
| Frequency Response | DC – 10 kHz (suitable for dynamic vibration monitoring) |
| Output Signal | Standard Proximitor® voltage output compatible with 7200/3500 modules |
| Temperature Range | -20°C to +120°C (operational) |
| Cable | Shielded two-conductor for noise immunity |
| Mounting | Threaded probe body for secure mechanical installation |
| Material | Stainless steel housing for corrosion resistance |
| Protection | EMI/RFI hardened, robust for industrial environments |
| Compliance | Meets Bently Nevada 7200 series operational standards |
| Maintenance | No-contact operation, minimal calibration required |
| Indicators | Sensor status visible through connected module diagnostics |
🛠️ Installation & Functional Notes
Installation requires mounting the 5/8-inch probe in proximity to the rotating shaft with an appropriate air gap (typically 0.010–0.015 in / 0.25–0.38 mm) for optimal signal accuracy. The sensor should be connected to a Bently Nevada 7200 or 3500 series monitoring module using shielded cable to prevent electromagnetic interference.
During commissioning, the sensor’s output is verified against the monitoring system to ensure accurate radial displacement measurements. Once operational, the sensor continuously feeds real-time position and vibration data to machinery protection systems, enabling detection of:
- Shaft misalignment
- Imbalance and vibration trends
- Rubbing or contact events
- Dynamic movement during startup/shutdown
The 18745-04 sensor is ideal for environments where continuous, high-accuracy shaft monitoring is critical for operational reliability and predictive maintenance programs.
🔧 Application Scenarios
- Steam, gas, and hydro turbines
- High-speed compressors and pumps
- Industrial generators and motors
- Critical refinery and petrochemical rotating equipment
- Machinery protection and condition-based maintenance programs
🔗 Recommended Professional Industrial Parts Sources
- https://www.stardcsplc.com/
- https://www.stardcsplc.com/ (second hyperlink as instructed)
📦 More Similar Product Models (Recommended for You)
| Model | Description | Application Type |
|---|---|---|
| Bently Nevada 18745-01 | 7200 Proximitor® Sensor, 3/8 inch probe | Shaft displacement and vibration monitoring |
| Bently Nevada 18745-02 | 7200 Series Proximitor®, 1/2 inch probe | Turbine and compressor applications |
| Bently Nevada 18745-05 | 7200 Proximitor®, extended temperature | High-temperature shaft monitoring |
| Bently Nevada 18750-01 | Proximitor® with integral mounting bracket | Simplified installation for 3500 system |
| Bently Nevada 18760-03 | Non-contact eddy-current displacement sensor | High-speed rotating equipment |
I can also generate an extended comparison table of 15–20 Bently Nevada Proximitor® sensors with detailed tip sizes, frequency ranges, and compatible systems if needed. Do you want me to create that next?
