Excellent PLC
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Product Overview
The Bently Nevada 330850-50-05 is part of the 3300 XL 25 mm Proximitor Sensor System. It offers a non-contact measurement solution designed for differential expansion (DE) monitoring in mid- to large-sized steam turbines. The system includes a 25 mm proximity probe, extension cable, and Proximitor sensor, delivering a linear output of 0.787 V/mm over a 12.7 mm range.
Key Applications
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Differential Expansion (DE) measurement in turbine generators
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Rotor-stator movement monitoring
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High-temperature and high-vibration industrial environments
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Suitable for AISI 4140 steel and other target materials (on request)
Product Advantages
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Wide Linear Range: 12.7 mm range ensures precise DE monitoring
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High Temp Endurance: Probe operates continuously up to 200°C, short-term up to 250°C
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Field-Proven: Reliable even in harsh steam turbine environments
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System Compatibility: Direct upgrade path from 7200 and legacy systems
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Flexible Mounting: DIN or panel mounting options
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RFI/EMI Resistant: Immunity to electromagnetic noise ensures reliable output
Technical Specifications
| Parameter | Specification |
|---|---|
| Linear Range | 12.7 mm (0.5 in) |
| Scale Factor | 0.787 V/mm (20 mV/mil) |
| Operating Voltage | -17.5 Vdc to -26 Vdc |
| Temperature Range (Probe) | -35°C to +200°C (Short-term +250°C) |
| Temperature Range (Sensor) | -51°C to +100°C |
| Output Resistance | 50 Ω |
| Sensor Material | A380 Aluminum |
| Probe Material | AISI 304 Stainless Steel, PEEK tip |
| System Length | 5.0 meters |
| Total Weight | 0.255 kg (255 g) |
| Extension Cable Capacitance | 69.9 pF/m |
| Frequency Response | 0 to 2.7 kHz (+0, -3 dB typical) |
| Mounting Options | Panel mount or DIN-rail |
| Approvals | CE, RoHS, CSA, ATEX/IECEx for hazardous areas |
Frequently Asked Questions (FAQ)
Q1: What is the purpose of the 330850-50-05 sensor?
A1: It is used for measuring differential expansion in turbines by detecting rotor-to-stator displacement.
Q2: Can it replace 7200 series proximity systems?
A2: Yes, it’s fully backward compatible with 7200 and 25 mm DE systems.
Q3: What type of target material is it calibrated for?
A3: Standard calibration is for AISI 4140 steel; others available upon request.
Q4: What is the typical operating temperature of the probe?
A4: Continuous up to 200°C, with short-term tolerance up to 250°C.
Q5: Is the sensor RFI/EMI protected?
A5: Yes, it meets CE mark requirements and resists high-frequency noise.
Q6: What is the maximum system cable length?
A6: Up to 9.0 meters with proper component matching.
Q7: Does it require specific mounting tools?
A7: No, SpringLoc terminals allow tool-free, robust connections.
Q8: Can it be used in hazardous zones?
A8: Yes, it’s certified for use in Class I, Zone 0/2 areas with appropriate installation.
Q9: How is moisture prevented from entering the probe?
A9: Dual sealing (front and rear) with FluidLoc cable and connector protectors.
Q10: Is a sliding bracket available for alignment verification?
A10: Yes, optional sliding brackets are available for accurate installation checks.
Related 3300 XL Series or Compatible Models
| Model | Description | System Length | Weight |
|---|---|---|---|
| 330850-51-05 | DIN mount, 5.0 m system | 5.0 m | 0.255 kg |
| 330850-90-05 | Panel mount, 9.0 m system | 9.0 m | 0.295 kg |
| 330850-91-05 | DIN mount, 9.0 m system | 9.0 m | 0.295 kg |
| 330851-01-000-020 | Threaded probe, 2.0 in length | 5.0 m | ~0.25 kg |
| 330854-040-24-05 | Extension cable, 4.0 m, High Temp FluidLoc | 4.0 m | ~0.18 kg |
| 330854-080-24-05 | Extension cable, 8.0 m, High Temp FluidLoc | 8.0 m | ~0.36 kg |
Popular Bently Nevada Models
| Model | Description | Application | Weight |
|---|---|---|---|
| 3500/42M | Proximitor Seismic Monitor Module | Vibration Monitoring | ~0.5 kg |
| 3500/22M | Transient Data Interface (TDI) | Data Collection | ~0.4 kg |
| 3500/15 | Power Supply Module | Rack Power | ~0.7 kg |
| 330104-00-20-10-02 | 8 mm Proximity Probe | General Vibration | ~0.18 kg |
| 330130-040-00-00 | Extension Cable for 8 mm Probe | Cable Extension | ~0.15 kg |
| 330180-91-CN | 3300 XL 8 mm Proximitor Sensor | Shaft Position Monitoring | ~0.25 kg |
