Bentley 330180-51 CN preamplifier (3300 XL 8mm system)
330180-51 CN is the preamplifier of Bently Nevada 3300 XL 8mm eddy current sensor system, used to linearly convert probe gap changes into voltage signals. It is the core signal conditioning unit for monitoring shaft vibration/axial displacement/speed of rotating machinery. CN represents the model in China.

1、 Product Information
Model: 330180-51 CN (complete models often have suffixes, such as 330180-51 05 CN)
Series: 3300 XL 8mm Eddy Current Sensor System
Manufacturer: Bently Nevada (Bently Nevada, USA)
Core function: Receive high-frequency signals from 3300 XL 8mm probes and extension cables, convert them into linear DC voltage outputs, and provide them for monitoring/PLC acquisition.
Suitable cable length: 5m system (51=5m, 91=9m).
2、 Technical parameters and specifications
1) Electrical parameters
Sensitivity: 7.87 V/mm (200 mV/mil), with an error of ± 5%.
Linear range: 2 mm (0.25-2.3 mm), corresponding to an output of -1 VDC to -17 VDC.
Recommended gap: 1.27 mm (50 miles).
Frequency response: 0-10 kHz (-3 dB), covering the entire frequency range of vibration/speed.
Power supply: 17.5-26 VDC (without safety barrier); 23-26 VDC (with safety barrier); Current ≤ 12 mA.
Output: DC voltage (proportional to gap), short circuit protection.
Temperature range: working -35 ℃ to+85 ℃; Storage -35 ℃ to+100 ℃.
2) Machinery and Environment
Dimensions (length x width x height): approximately 114 mm x 32 mm x 76 mm.
Weight: Approximately 0.22 kg.
Installation: * * DIN rail (default) * * or panel installation (compatible with old 4-hole positions).
Protection: IP20; Anti RFI/EMI, compliant with CE standards, no need to shield conduit.
Wiring: SpringLoc tool free terminal, compatible with 0.2-1.5 mm ² cables.

3、 Usage scenarios
Electricity: Monitoring of shaft vibration/axial displacement/differential expansion of steam turbines and generators.
Metallurgy: Vibration protection for high-speed rotating shafts of rolling mills, fans, and compressors.
Petrochemical/Chemical: Non contact displacement/vibration monitoring for centrifugal compressors, pumps, and motors.
Industrial General: High speed spindle, turbine machinery status monitoring and fault diagnosis, in compliance with API 670 standard.
4、 Related models (330180 series)
1) According to cable length
330180-51 CN: 5m system (commonly used)
330180-91-CN: 9m system
2) By authentication/suffix
330180-51 00 CN: Basic type
330180-51 05 CN: Multiple certifications (including explosion-proof/CE)
330180-51 02 CN: with safety barrier adaptation
3) Supporting probes/cables
Probe: 330102 (8mm), 330103 (8mm)
Extension cable: 330130 (5m/9m)
5、 Key advantages
High precision interchangeability: The probe/cable/preamplifier can be interchanged on site without the need for recalibration.
Wide temperature stability: Industrial grade temperature tolerance from -35 ℃ to+85 ℃, suitable for harsh environments.
Strong anti-interference: RFI/EMI suppression, no need to shield conduits, reducing installation costs.
Flexible installation: DIN rail/panel dual installation method, compatible with both old and new systems.