Overview
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 330904-02-20-05-01-00 |
| Brand | Bently Nevada |
| Product Type | 3300 NSv Proximity Probe |
| Origin | USA |
| Weight | Not specified |
| Dimensions | 3/8-24 UNF probe case; 2.0 in overall case length; 0.5 m total length |
| Operating Temp | Probe tip and case: -34 deg C to +177 deg C; Cable and connector: -34 deg C to +177 deg C |
| Power Consumption | Supplied by compatible 3300 NSv Proximitor Sensor; probe passive component, no direct power consumption |
| System Compatibility | 3300 NSv Proximity Transducer System |
| Measurement Range | 0.25 to 1.25 mm (10 to 50 mils) typical |
| Scale Factor | 7.87 V/mm (200 mV/mil) nominal |
| Frequency Response | 0 Hz (DC) to 10 kHz |
| Thread Type | 3/8-24 UNF-2A |
| Probe Case Material | 303 stainless steel |
| Probe Tip Material | Polyphenylene sulfide (PPS) |
| Cable Type | 75 ohm coaxial cable with FEP jacket |
| Connector Type | Gold-plated brass ClickLoc coaxial connector |
| Connector Option | Miniature coaxial ClickLoc connector |
| Humidity Limit | 100% condensing, non-submerged when properly protected |
Eddy-Current Measurement and Rotor Dynamics Characteristics
The 3300 NSv Proximity Probe uses eddy-current measurement technology to convert shaft-to-probe distance variations into electrical displacement signals. The calibrated scale factor provides consistent gap voltage response for rotor position and vibration monitoring applications.
The probe operates with the 3300 NSv Proximitor Sensor using a standard gap voltage measurement method. Probe calibration is based on AISI 4140 steel targets, supporting gap voltage validation and rotor dynamics analysis in restricted mechanical installation areas.
The 3300 NSv design incorporates a reduced tip diameter configuration for applications requiring compact probe installation. The coaxial cable construction and ClickLoc connector design support signal integrity for dynamic vibration measurement.
Frequently Asked Questions
Q: Is the 330904-02-20-05-01-00 a powered device?
A: No. The probe is a passive eddy-current sensing element. Excitation and signal conditioning are provided by the compatible 3300 NSv Proximitor Sensor.
Q: Can this probe be replaced without recalibrating the Proximitor Sensor?
A: The 3300 NSv system supports physical and electrical interchangeability between compatible probes and extension cables without requiring Proximitor Sensor recalibration.
Q: What type of mechanical measurement does this probe provide?
A: The probe measures shaft displacement variations, including dynamic vibration and static position changes, through non-contact eddy-current sensing.
Field Installation Guidelines
- Install the probe using the specified 3/8-24 UNF-2A threaded mounting interface.
- Maintain proper probe tip clearance from the rotating target surface according to the 3300 NSv system calibration requirements.
- Route the coaxial cable away from high-current power wiring and strong electromagnetic interference sources.
- Ensure the ClickLoc connector is fully engaged and protected from contamination or mechanical stress.
- Connect cable shielding and grounding according to the 3300 NSv installation documentation and site grounding practices.
- Verify the probe gap voltage after installation before commissioning vibration or position monitoring functions.
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