The Bently Nevada 330195-02-12-50-00, also cataloged as the 330195 Reverse Mount Proximity Probe, operates as a dedicated hardware component for dynamic shaft position and vibration measurement within 3300 XL Transducer System networks. It generates an eddy-current radio frequency field to detect proximity variation between the probe tip and target shaft, converting displacement into high-frequency proportional voltage signals for downstream processing by a paired Proximitor sensor.
| Option Code | Specification Parameter | Value / Description |
|---|---|---|
| 330195 | Base Model | 3300 XL 8 mm Reverse Mount Probe (3/8-24 UNF threads) |
| -02 | Unthreaded Length Option | 0.2 in |
| -12 | Overall Case Length Option | 1.2 in |
| -05 | Total Length Option | 5.0 metres (16.4 feet) |
| -00 | Agency Approval Option | Not required |
| Parameter | Specification |
|---|---|
| Model | 330195-02-12-50-00 |
| Brand | Bently Nevada |
| Origin | USA |
| Weight | Approx 0.25 kg (Shipping Weight 2.0 kg) |
| Dimensions | 3/8-24 UNF reverse mount housing with 5.0 m integral cable |
| Operating Temp | -51 deg C to +177 deg C (-60 deg F to +350 deg F) |
| Power Consumption | Passive transducer (powered by external Proximitor driver circuit) |
| Thread Type | 3/8-24 UNF threads |
| Unthreaded Length | 0.2 in |
| Overall Case Length | 1.2 in |
| Total System Length | 5.0 metres (16.4 feet) |
| Pressure Sealing | Viton O-ring tip-to-case differential pressure seal |
| Agency Approval | Not required (Option 00) |
The 330195-02-12-50-00 probe requires precise eddy-current probe scaling to convert target surface proximity into a standardized linear scale factor (typically 7.87 V/mm or 200 mV/mil). During mechanical commissioning, field engineers perform gap voltage validation (-10 VDC targets) measured at the Proximitor test points to establish accurate static centering relative to the journal surface. Proper mounting alignment mitigates cross-talk suppression issues when multiple probe bodies operate in close physical proximity along high-speed rotor dynamics paths.
Q: How is the physical gap voltage set during reverse mount probe installation?
A: Adjust the axial thread depth of the reverse mount housing while monitoring output voltage at the Proximitor terminals until the reading stabilizes at -10.0 VDC, corresponding to the center of the linear operating range.
Q: Can this 5.0 metre total length probe be connected directly to a Proximitor without an extension cable?
A: Yes, because the integral probe cable is 5.0 metres long, it connects directly into a standard 5.0 metre Proximitor sensor unit without using an intermediate extension cable.
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