Description
Product Overview
Bently Nevada 330180-91-CN is a 3300 XL 8mm Proximitor sensor (preamplifier) designed for eddy-current proximity transducer systems. It excites the proximity probe, processes the RF signal, and outputs a linear voltage proportional to the gap between probe tip and rotating shaft target. This unit is calibrated for a total 9-meter transducer system length (probe + extension cable) and uses DIN rail mounting. It feeds shaft vibration, axial position and eccentricity measurements to 3500 series machinery monitoring racks on steam turbines, centrifugal compressors, generators and high-speed rotating equipment. The CN suffix denotes region-compliant 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 | 330180-91-CN |
| Manufacturer | Bently Nevada (Baker Hughes) |
| Product Type | 3300 XL 8mm Proximitor Sensor / Preamplifier |
| Calibrated System Length | 9 m total (probe + extension cable) |
| Scale Factor | 7.87 V/mm (200 mV/mil) |
| Mounting | DIN rail mount |
| Supply Voltage | -24 VDC |
| Power Consumption | 1.5 W typical |
| Output | Linear gap-proportional voltage |
| 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 8mm proximity probe assemblies |
Engineer Notes
- This Proximitor is factory calibrated for a full 9m transducer assembly. Any change to total probe + extension cable length alters scale factor and causes measurement drift or false alarms.
- Use only matching 3300 XL 8mm probe and extension cable. Do not mix NSv series components with this standard 3300XL Proximitor.
- 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 the high-frequency eddy current signal and degrades linearity.
- Maintain the specified minimum bend radius for coaxial cables. Sharp bends change capacitance and invalidate the 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 9m cable assembly. Move target across linear range and confirm output voltage matches expected scale factor.
- Fault simulation: Open probe cable connection; confirm Proximitor generates 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 330180-91-CN with a shorter or longer transducer cable assembly? A: No. This unit is calibrated specifically for 9m total system length. Changing total length requires a different part number and re-calibration.
Q: What does the CN suffix stand for? A: CN indicates included regional certification paperwork. Hardware functionality is identical to the 330180-91-00 version.
Q: Is this compatible with 3300 XL NSv probes? A: No. This is standard 3300XL 8mm Proximitor. NSv transducers require 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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