Description
Product Core Brief
- Model: 330850-50-00
- Brand: Bently Nevada
- Series: 3300 XL 25 mm
- Core Function: Measures medium-to-large turbine generator differential expansion (differential growth).
- Product Type: Proximitor Module
- Key Specs: 25mm System | Panel Mount | 0.787 V/mm
- Condition: New Original (New Surplus)
BENTLY 330850-50-00
Product Introduction
BENTLY 330850-50-00 is a Proximitor module specifically designed for the 3300 XL 25 mm sensor system. It is widely used in TSI (Turbine Supervisory Instrumentation) systems for large rotating machinery.
This unit provides a 12.7 mm extended linear measurement range to monitor uneven expansion between the turbine rotor and casing. The BENTLY 330850-50-00 features panel mounting, strong RF/EMI immunity, and is CE certified without requiring special shielding.
Key Technical Specifications
- System Type: 3300 XL 25 mm
- Sensitivity: 0.787 V/mm (20 mV/mil)
- Linear Range: 12.7 mm (0.50 in)
- Mounting Style: Panel Mount
- Supply Voltage: -24 Vdc
- Operating Temp: -35 °C to +85 °C
- Output Type: Voltage (proportional to gap)
- Application: Differential Expansion / Axial Position
Quality Control Process (Engineer’s Perspective)
- Incoming Verification: Trace source via serial number. Inspect PCB for flux residue or pin corrosion.
- Live Functional Test: Power-on self-check. Connect to TK-3E calibrator to verify linearity across the 12.7 mm range.
- Electrical Parameter Test: Measure insulation resistance (500 V Megger, >10 MΩ). Verify ground continuity.
- Firmware Verification: Read firmware version. Photograph DIP switch positions.
- Final QC & Packaging: Seal in anti-static bag. Apply QC Passed label with date.
Replacement Pitfall Guide
❗ System Size Mismatch: The BENTLY 330850-50-00 is strictly for 25 mm systems. Do not mix with 8 mm or 11 mm probes.
❗ Complete System Replacement: When upgrading to the 3300 XL 25 mm system, the entire system (probe, extension cable, and proximitor) must be replaced together.
❗ Power Supply: This module requires negative DC voltage (-24 Vdc typical). Positive voltage will destroy the internal circuitry.
❗ Mounting Hardware: This unit uses panel mounting. Verify hole patterns if replacing a DIN rail unit.
❗ ESD & Handling: Use anti-static mat. Dry environments increase failure risk during handling.
Keep these in mind and you’ll cut 90% of rework time.
BENTLY 330850-50-00
Compatibility Matrix & Benchmarks
- 330850-50-00 → 330850-50-CN : Direct — verify certification suffix
- 330850-50-00 → 330850-51-00 : Needs Adaptation — verify cable length configuration
- 330850-50-00 → 330850-90-00 : Incompatible — 9.0 m system length
Benchmarks:
- Signal-to-noise ratio: >60 dB (calibrated system)
- Temperature drift: <0.5 mV/°C (compensated design)
