The Bently Nevada 330180-51-00, also cataloged as the 3300 XL Proximity Sensor, operates as a dedicated hardware component for converting eddy-current probe displacement signals into proportional voltage targets within 3300 and 3300 XL Machinery Monitoring System platforms.
Hardware Specifications
Parameter
Specification
Model
330180-51-00
Brand
Bently Nevada
Origin
USA
Weight
0.2 kg
Dimensions
8.8 x 3.5 x 7 cm
Total Length and Mounting Option
5.0 meters (16.4 feet) system length, DIN mount
Agency Approval Option
00 Not required
Output Resistance
50 Ohm
Supply Voltage
24 VDC
Scale Factor
7.87 V/mm (200 mV/mil)
Probe Compatibility
5 mm and 8 mm eddy-current probes
Tariff Code
8537101190
Eddy-Current Probe Scaling and Cross-Talk Suppression
The 330180-51-00 sensor achieves precise eddy-current probe scaling by generating a high-frequency radio frequency (RF) signal to excite the attached 5 mm or 8 mm probe tip. The resulting electromagnetic field interacts with the target rotor dynamic surfaces, modifying the internal oscillator amplitude. The device decodes these variations to deliver a linear voltage output proportional to the gap distance, calibrated at a standard 7.87 V/mm scale factor. To maintain target signal integrity across multi-channel turbomachinery trains, the physical packaging integrates cross-talk suppression and radio frequency interference (RFI) immunity. This design allows high-density DIN-rail or panel-mount grouping inside fiberglass enclosures without signal degradation or the need for separate metallic isolation plates.
Frequently Asked Questions
Q: How is the gap voltage validation performed on this sensor?
A: Gap voltage validation is performed by measuring the DC voltage output across the SIG and COM terminals using a digital multimeter. Under standard calibration conditions, a nominal -10 VDC target voltage corresponds to the midpoint of the linear range for the 3300 XL 5 mm and 8 mm probe systems.
Q: Can this sensor be mounted alongside older Proximitor footprints?
A: Yes. The underlying mechanical base supports dual configurations. It integrates a secure DIN-rail locking mechanism for high-density rail systems alongside a traditional 4-hole mounting footprint that matches older Bently Nevada Proximitor layouts, ensuring backward physical compatibility.
Field Installation Guidelines
Electrical Isolation: Ensure the integrated mounting base is properly locked onto the DIN rail or secured to the panel. The base provides 500 Vrms galvanic isolation from the frame, eliminating the requirement for external non-conductive isolator plates.
Cable Routing Constraints: Maintain a physical separation between the Proximitor extension cables and high-voltage AC power lines to prevent electromagnetic coupling. Do not exceed the designated 5.0-meter total system length combination (probe plus extension cable) to avoid altering the calibrated scale factor.
Coaxial Connector Torque: Hand-tighten the coaxial connections between the probe, extension cable, and the 330180-51-00 sensor. Do not use pliers or excessive mechanical torque, as this can deform the sub-miniature connectors and degrade the high-frequency RF path.
