BENTLY NEVADA 330104-00-04-50-11-00 Proximity Probe

Configured for continuous non-contact shaft displacement measurement and vibration monitoring in 3500 and 3300 Machinery Monitoring Systems, the Bently Nevada 330104-00-04-50-11-00 (330104 3300 XL 8 mm Proximity Probe) provides direct physical/electrical execution. It transforms high-frequency radio frequency (RF) fields generated by an eddy-current proximity system into accurate proportional voltage signals matching physical clearance changes on rotating target shafts.

Suffix Breakdown & Model Matrix

Hardware Specifications

Eddy-Current Probe Scaling & Gap Voltage Validation

The 330104 proximity probe maintains precise eddy-current probe scaling to ensure linear response profiles across static and dynamic measurements. Calibration to a standard scale factor of 7.87 V/mm (200 mV/mil) allows precise detection of peak-to-peak shaft vibration and axial position changes. During field installation, engineers execute gap voltage validation (-10 VDC targets representing a 1.27 mm nominal center gap) to establish proper probe tip clearance relative to target metallurgy. Maintaining a true 5.0 m total system length guarantees target cross-talk suppression and maintains overall accuracy for critical rotor dynamics evaluations.

Frequently Asked Questions

Q: Are 3300 XL 8 mm probes factory pressure tested for differential sealing applications?

A: No. While the probe design incorporates a Viton O-ring between the PPS tip and stainless steel case to resist differential fluid passage, probes are not individually pressure tested prior to shipment unless custom testing is specified.

Q: What is the mechanical function of the ClickLoc connector protector supplied with the -11 option?

A: The ClickLoc connector protector provides environment sealing and mechanical strain relief at the probe-to-extension-cable connection point, preventing liquid ingress and accidental disengagement.

Q: Can the 5.0 m integrated probe cable be trimmed or re-terminated directly in the field?

A: No. Trimming or splicing the cable modifies total loop capacitance, invalidating factory calibration and altering the 7.87 V/mm output scale factor.

Field Installation Guidelines

• Torque the threaded probe body into the mounting port using standard wrench flats, taking care not to exceed recommended case installation limits.
• Verify thread engagement depth to avoid mechanical tip impact against the target shaft during initial rotor alignment.
• Route extension cabling through grounded metal conduit, observing a minimum bend radius of 25.4 mm (1.0 in) to protect inner coaxial conductors.
• Isolate total cable shielding to a single ground point at the Proximitor housing chassis to eliminate ground loop noise.