Manufacturer: Bently Nevada
Product No.: 330851-02-000-050-50-00-00
Country of origin:United States
Product Type: Proximity Probes
Payment: T/T, Western Union
Weight: 320g
Shipping port: Xiamen
Warranty: 12 months
Engineered for high-precision displacement and vibration measurements in heavy rotating machinery, the Bently Nevada 330851-02-000-050-50-00-00 operates as a ruggedized 25 mm Eddy current proximity sensor. This transducer is specifically designed to monitor shaft vibration, axial position, and differential expansion in critical industrial assets such as steam turbines, gas turbines, and large-scale compressors. Utilizing a high-integrity Polyetheretherketone (PEEK) tip and a corrosion-resistant AISI 304 stainless steel threaded case, this 3300 XL 25 mm Proximity Probe delivers reliable performance under demanding mechanical and thermal conditions. It features a 75 ohm triaxial, PFA-insulated FluidLoc probe cable designed to prevent moisture and fluid migration through the internal cable core, ensuring stable signal transmission to the associated Proximitor sensor.
| Option Code | Configuration Value | Description |
|---|---|---|
| 02 | M30x2 Thread | Metric threaded probe case |
| 000 | 0 mm | Unthreaded case length |
| 050 | 50 mm | Overall case length (Metric) |
| 50 | 5.0 meters (16.4 feet) | Total cable length |
| 00 | No Armor | Standard cable outer sheath without protective armor |
| 00 | No Approvals | Standard non-certified agency approval option |
| Parameter | Specification Value |
|---|---|
| Manufacturer | Bently Nevada |
| Model Number | 330851-02-000-050-50-00-00 |
| Probe Tip Diameter | 25 mm |
| Probe Tip Material | Polyetheretherketone (PEEK) |
| Case Material | AISI 304 stainless steel (SST) |
| Cable Impedance | 75 ohm (triaxial) |
| Cable Insulation | Perfluoroalkoxyethylene (PFA) with FluidLoc barrier |
| Operating Temperature Range | -35 degC to +200 degC (-31 degF to +392 degF) |
| Net Sensor Weight | 0.230 kg (0.51 lbs) |
| Shipping Weight | 1.3 kg (2.87 lbs) |
| Country of Origin | United States (USA) |
The 3300 XL 25 mm proximity probe system is designed specifically for large-scale application parameters such as differential expansion and keyphaser measurements. It must be paired exclusively with a matching 3300 XL 25 mm Proximitor Sensor. Standard 3300 XL 8 mm or 11 mm Proximitor drivers will fail to properly calibrate or drive this 25 mm probe coil due to differences in inductive coil impedance and excitation frequencies. If replacing an older, legacy 7200 series 25 mm system, ensure that both the probe and the proximitor are upgraded simultaneously, as the legacy 7200 driver circuitry is incompatible with the 3300 XL platform.
Due to the large 25 mm sensing tip, the sensor has a significantly wider electromagnetic field footprint compared to smaller 8 mm sensors. Engineers must maintain a minimum clear lateral spacing around the probe tip to prevent side-viewing errors and parasitic interference from structural brackets or machine casings. Mounting the probe too close to adjacent metal structural members will alter the coil's magnetic field path, leading to offset calibration errors and incorrect displacement readings. Always verify that the target material matches the calibration standards (typically AISI 4140 steel) of the matching Proximitor sensor.
Ensure that the mechanical mounting torque does not exceed manufacturer recommendations for the M30x2 thread; over-tightening can deform the internal coil housing. Always protect the miniature coaxial connection between the probe cable and the extension cable. Moisture ingress or dust inside this connector will degrade the high-frequency RF signal, causing erroneous high-amplitude noise or "spiking" on the monitor display. Use self-fusing silicone connector wrap or Bently Nevada connector protection sleeves to isolate and protect the physical cable junction.
CRITICAL WARNING
Before starting the installation or removal of the proximity probe, ensure the target machine is completely de-energized and locked out under safe mechanical and electrical work protocols. Ensure all monitor power is switched off before disconnecting or connecting the sensor coaxial lines to avoid electrostatic discharge (ESD) and potential damage to delicate front-end Proximitor amplifier circuits.
Verify that the probe mounting hole is clean, free of metal chips, and dry before threading in the M30x2 probe housing.
Thread the probe into the mounting bracket or casing until the correct electrical gap is set using a digital voltmeter measuring the Proximitor's DC output voltage (typically -10 VDC for the mid-range of standard calibration).
Tighten the locknut to secure the probe, ensuring that the probe housing does not rotate and alter the calibrated gap distance during final torque application.
Connect the coaxial interface to the extension cable, apply a protective connector sleeve, and secure the cable along its run using non-conductive, vibration-resistant mounting clips.
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Returns & Warranty
Orders are processed and delivered Monday-Friday (excluding public holidays).
For full eligibility, restocking fees, and international return details, please view our official Refund & Return Policy .
| Country of origin |
United States
|
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