Description
Product Overview
Bently Nevada 330180-51-CN is a 3300 XL Proximitor sensor (preamplifier) for eddy-current proximity transducer assemblies. It drives the proximity probe, processes RF signals, and outputs linear voltage proportional to the gap between probe tip and rotating shaft target. This unit is factory calibrated for a total 5-meter transducer system length (probe + extension cable) and supports DIN rail mounting. It feeds shaft vibration, axial position and eccentricity measurements to 3500 machinery monitoring racks on steam turbines, centrifugal compressors, generators and high-speed rotating equipment. The CN suffix provides regional certification documentation. OEM production has ended; available stock consists of surplus or refurbished tested replacement units for turbomachinery protection and condition monitoring systems.
Technical Specifications
| Item | Parameter |
|---|---|
| Part Number | 330180-51-CN |
| Manufacturer | Bently Nevada (Baker Hughes) |
| Product Type | 3300 XL Proximitor Sensor / Preamplifier |
| Calibrated System Length | 5 m total (probe + extension cable) |
| Scale Factor | 7.87 V/mm (200 mV/mil) |
| Mounting | DIN rail mount |
| Supply Voltage | -24 VDC nominal, range -17.5VDC ~ -26VDC |
| Power Consumption | 1.5 W typical |
| Frequency Response | 0–10 kHz, +0/-3dB |
| Linear Measurement Range | 0.25mm ~ 2.3mm |
| Operating Temperature | -51°C to +100°C |
| Storage Temperature | -55°C to +105°C |
| Compliance | API 670, CN certification |
| Weight | ~246 g |
| Compatible Probe | 3300 XL 5mm / 8mm proximity probe assemblies |
Engineer Notes
- This Proximitor is factory calibrated for a full 5m transducer assembly. Changing the combined probe plus extension cable total length will alter scale factor and cause measurement drift or false machinery alarms.
- Pair only with standard 3300 XL 5mm or 8mm probe and matching extension cable. Do not mix NSv series components with this standard 3300XL Proximitor.
- Coaxial Microdot/ClickLoc connectors are precision parts. Avoid over-tightening, pulling or contaminating contact surfaces. Damaged connectors produce intermittent gap signals.
- Separate probe extension wiring from high-current AC and relay cables. Electrical noise disturbs high-frequency eddy current signals and degrades linearity.
- Maintain the minimum bend radius for coaxial cables. Sharp bends change internal capacitance and invalidate factory calibration.
- Apply ESD controls while handling. After replacement, perform mechanical gap adjustment and full transducer calibration before returning machinery to service.
Pre-Shipment Test Protocol
- Visual inspection: Check aluminum housing, terminal block, coaxial input connector and labels for dents, corrosion or broken pins.
- Continuity and insulation test: Verify no short or leakage paths across probe input terminals.
- Bench calibration test: Pair with known-good 3300XL 8mm probe and matched 5m cable assembly. Move target across linear range and confirm output voltage matches expected scale factor.
- Fault simulation: Open probe cable connection; confirm Proximitor enters fault state.
- Power cycling: Cycle -24VDC supply 10 times, confirm consistent gap output after each restart.
- Save test logs and photos for QA records.
Buyer FAQ
Q: Can I use 330180-51-CN with a longer transducer cable assembly? A: No. This unit is calibrated specifically for 5m total system length. Changing total length requires a different part number and re-calibration.
Q: What does CN suffix mean? A: CN denotes regional certification paperwork. Hardware function matches 330180-51-00.
Q: Is this compatible with 3300 XL NSv probes? A: No. This is standard 3300XL Proximitor. NSv transducers require dedicated NSv Proximitor hardware.
Q: Are proximity probe and extension cable included? A: Only the Proximitor sensor unit is supplied. Probe and extension cable sold separately unless noted on your quote.
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