Product Overview
The Bently Nevada 330850-91-05 is part / the 3300 XL 25 mm Proximity Transducer System, optimized for monitoring differential expansion (DE) in mid to large steam turbine generators. The system includes a 25 mm proximity probe, extension cable, and Proximitor sensor, designed to deliver precise non-contact measurement over a linear range / 12.7 mm.
Applications
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Steam turbines: DE measurement between rotor and stator
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Turbine generators: Rotor axial displacement tracking
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High-temperature industrial environments: Up to 200°C continuous operation
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Complementary and single transducer DE setups
Advantages
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Long linear range: 12.7 mm (500 mils) for extended measurement
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High temperature tolerance: Up to 200°C continuous, 250°C short term
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Interchangeable upgrade path: Fully compatible with legacy 7200 series
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Robust build: Stainless steel casing, sealed probe tip with PFA-insulated FluidLoc cables
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Flexible installation: DIN-rail or panel mountable sensor
Technical Specifications
| Parameter | Value |
|---|---|
| モデル | 330850-91-05 |
| System Length | 9.0 meters (29.5 feet) |
| Linear Range | 12.7 mm (500 mils) |
| Output Scale Factor | 0.787 V/mm (20 mV/mil) |
| Sensor Material | A380 Aluminum |
| Probe Case Material | AISI 304 Stainless Steel |
| Extension Cable Material | PFA-insulated 75 Ω triaxial FluidLoc cable |
| Temperature Range (Probe) | -35°C to +200°C (up to 250°C short-term) |
| Temperature Range (Sensor) | -51°C to +100°C |
| Relative Humidity | 100% condensing, non-submersible |
| Minimum Target Diameter | 61 mm (2.4 in) |
| Frequency Response | 0 to 2.7 kHz, ±3 dB |
| Output Resistance | 50 Ω |
| 重量 | 0.255 kg (Proximitor Sensor only) |
| Total Length | 9.0 meters |
| Compliance | CE, FCC, CSA, ATEX, IECEx |
FAQ
Q1: What is the main function / the 330850-91-05 sensor?
A1: It measures differential expansion between a turbine rotor and stator using a non-contact proximity probe system.
Q2: What is the linear measurement range / this sensor system?
A2: The system provides a linear measurement range / 12.7 mm (500 mils).
Q3: Can this model replace older 7200 systems?
A3: Yes, it is compatible with standard 7200 25 mm and 35 mm systems for easy replacement.
Q4: Is the sensor suitable for high-temperature environments?
A4: Yes, it withstands continuous operation at 200°C and short-term exposure up to 250°C.
Q5: What mounting options are supported?
A5: Both DIN-rail and panel mounting options are available.
Q6: What type / output signal does it provide?
A6: It delivers a scale factor output / 0.787 V/mm (20 mV/mil).
Q7: What materials are used for environmental resistance?
A7: The sensor uses stainless steel and PFA insulation with sealed connectors.
Q8: Can it be installed in hazardous areas?
A8: Yes, it holds ATEX, IECEx, and CSA certifications for hazardous locations.
Q9: What cable lengths are available?
A9: Probe and extension cables support total lengths / 5 m or 9 m.
Q10: Does it support redundancy in DE measurement?
A10: Yes, it allows dual transducer configurations for redundancy and accuracy.
Related モデルs in the Same Series
| モデル Number | 説明 | Total Length | Linear Range | 重量 |
|---|---|---|---|---|
| 330850-51-05 | 5 m, DIN mount Proximitor Sensor | 5.0 m | 12.7 mm | 0.255 kg |
| 330850-50-05 | 5 m, panel mount Proximitor Sensor | 5.0 m | 12.7 mm | 0.255 kg |
| 330851-01-000-030-10-00-05 | 25 mm Probe, 1 1/4-12 thread, 3 in case | 9.0 m | 12.7 mm | 0.230 kg |
| 330851-04-000-020-10-00-05 | 25 mm Probe, side exit, smooth case | 9.0 m | 12.7 mm | 0.230 kg |
| 330854-080-24-00 | 8 m Extension Cable, FluidLoc | 8.0 m | N/A | 0.36 kg |
| 330853-02-01 | Sliding Bracket, complementary DE application | N/A | N/A | 1.5 kg |
Popular Bently Nevada モデルs
| モデル Number | 説明 | Application | 重量 |
|---|---|---|---|
| 330104-00-10-10-02-00 | 3300 XL 8 mm Proximity Probe | General vibration monitoring | 0.15 kg |
| 3300 XL NSv | Narrow gap proximity probe | Small machinery DE monitoring | 0.12 kg |
| 3500/42M-01-00 | Proximitor Seismic Monitor | Vibration and position monitoring | 0.50 kg |
| 3500/44M | Aeroderivative GT Vibration Monitor | Gas turbine condition monitoring | 0.45 kg |
| 330400-02-12-10-02-00 | 3300 XL 11 mm Proximity Probe | Axial/radial position applications | 0.20 kg |
| 330930-065-02-05 | Velocity Sensor | Seismic monitoring | 0.25 kg |
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