Description
Product Core Brief
- Model: 330851-02-000-060-10-00-00
- Brand: BENTLY NEVADA
- Series: 3300 XL 25 mm
- Core Function: Measures Differential Expansion (DE) and axial displacement in steam turbines.
- Product Type: High-Temperature Eddy Current Proximity Probe
- Key Specs: 25 mm Tip | 1.0 m Cable | M30x2 Thread | 200°C Continuous
- Condition: New Original (New Surplus)
BENTLY 330851-02-000-060-10-00-00
Product Introduction
The BENTLY 330851-02-000-060-10-00-00 is a 25 mm eddy current proximity probe engineered for the most demanding Differential Expansion (DE) applications. It is specifically designed to measure the axial growth difference between the turbine rotor and casing in high-temperature steam environments.
Unlike standard 8 mm or 11 mm probes, this 25 mm sensor offers a massive 12.7 mm (500 mil) linear range, making it ideal for large steam turbines where thermal expansion can be significant. It features enhanced sealing and high-temperature connectors to survive in harsh turbine compartments.
Key Technical Specifications
| Parameter | Value |
|---|---|
| Probe Tip Diameter | 25 mm (0.98 in) |
| System Length | 1.0 m (3.3 ft) |
| Sensitivity | 0.787 V/mm (20 mV/mil) |
| Linear Range | 12.7 mm (500 mils) |
| Mounting Thread | M30 x 2 |
| Continuous Temp | 200°C (392°F) |
| Intermittent Temp | 250°C (482°F) |
| Sealing | FluidLoc™ Cable + Front/Rear Seals |
| Connector | High-Temp ClickLoc™ |
| Compliance | API 670, ISO 10817-1 |
Quality Control Process (Engineer’s Perspective)
- Incoming Verification: We check source traceability and verify serial numbers against anti-counterfeit databases. Visual inspection confirms no physical damage or connector corrosion.
- Live Functional Test: Power-on self-checks validate basic operation. We run continuous load tests exceeding 24 hours with temperature logging to ensure stability.
- Electrical Parameter Test: Insulation resistance is verified using a 500 V Megger, requiring >10 MΩ. Ground continuity is also strictly checked.
- Firmware Verification: We read and record internal firmware versions. DIP switch and jumper settings are photographed for future reference.
- Final QC & Packaging: The unit is sealed in an anti-static bag. A QC Passed label with the inspection date is applied before shipping.
BENTLY 330851-02-000-060-10-00-00
Replacement Pitfall Guide
❗ System Size Confusion: This is a 25 mm probe. Do not substitute with 8 mm or 11 mm probes. The sensitivity (20 mV/mil) and linear range are completely different and will not work with standard 330180/330780 proximitors.
❗ Temperature Rating: Verify your application temperature. While this probe handles 200°C continuous, standard 3300 XL probes are limited to ~177°C. Using a standard probe in a DE application will lead to premature failure.
❗ Cable & Connector: This probe uses FluidLoc™ cable and ClickLoc™ connectors. Do not mix with standard 330130 extension cables or standard ClickLoc connectors, as the sealing and temperature ratings differ.
❗ DE Measurement Setup: DE is typically measured with two probes on the same flange for redundancy, or on opposite sides to double the measurable range. Ensure your monitoring module (e.g., 3500/42M) is configured for differential expansion, not just simple displacement.
❗ ESD Damage: Use an anti-static mat during installation. Dry environments significantly increase electrostatic discharge risks to sensitive electronics.
Keep these in mind and you’ll cut 90% of rework time.
Compatibility Matrix & Benchmarks
- 330851-02-000-060-10-00-00 → 330851-02-000-060-10-00-CN : Direct — same probe, CN regional certification option
- 330851-02-000-060-10-00-00 → 330851-02-000-050-10-00-00 : Needs Adaptation — different system length (1.0 m vs 0.5 m)
- 330851-02-000-060-10-00-00 → 330104-00-60-10-00-00 : Incompatible — 8 mm vs 25 mm system
- Scan Cycle: < 1 ms (simulated load, 8 I/O points)
- Comms Throughput: 100 Mbps (Modbus TCP/IP)
