Excellent PLC
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| 13666033393 | ||||||||
| Add | Room 1004, No. 62 Xiangxiu Li, Siming District, Xiamen City, Fujian Province, China | |||||||
Product Overview
The Bently Nevada 330850-90-00 is part of the 3300 XL 25 mm Proximity Transducer System, used for measuring differential expansion (DE) in large steam turbine generators. This sensor detects shaft displacement with a linear range of 12.7 mm and high reliability under extreme conditions.
Applications
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Differential Expansion (DE) monitoring on large steam turbines
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Shaft position and movement detection
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Machinery condition monitoring in thermal power generation
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Retrofit upgrades from 7200 series probes without system reconfiguration
Key Advantages
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High-Temperature Tolerance: Probe withstands up to 200°C continuous, 250°C intermittently
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Robust Construction: Sealed with FluidLoc and stainless steel armor options
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Full System Compatibility: Drop-in replacement for 7200 series systems
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EMI/RFI Immunity: Meets CE mark standards without special installation
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Flexible Mounting: DIN rail or panel mounting options available
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Long Cable Lengths: Up to 9 meters total system length for remote installations
Technical Specifications
| Parameter | Specification |
|---|---|
| Linear Range | 12.7 mm (500 mils) |
| Scale Factor | 0.787 V/mm (20 mV/mil) |
| Total System Length | 9.0 meters |
| Weight | 0.255 kg (sensor only) |
| Frequency Response | 0 – 2.7 kHz, -3 dB typical |
| Operating Temperature (Sensor) | -51°C to +100°C |
| Operating Temperature (Probe) | -35°C to +200°C continuous; 250°C short-term |
| Probe Tip Material | PEEK (Polyetheretherketone) |
| Probe Case Material | AISI 304 Stainless Steel |
| Sensor Housing Material | A380 Aluminum |
| Cable Type | 75 Ω triaxial FluidLoc PFA insulated |
| Minimum Bend Radius | 25.4 mm |
| Environmental Protection | 100% condensing humidity, IP54 with protection |
| Power Supply | -17.5 Vdc to -26 Vdc, 12 mA max |
| Output | -1.5 to -11.5 Vdc |
FAQ
Q1: What is the typical use case for the 330850-90-00 sensor?
A1: It is used for differential expansion measurements in large steam turbine generators.
Q2: What materials are used in the sensor’s construction?
A2: The probe case is AISI 304 stainless steel; the sensor is A380 aluminum.
Q3: Can this sensor operate in high-temperature environments?
A3: Yes, up to 200°C continuously and 250°C for short durations.
Q4: What is the maximum system cable length?
A4: Up to 9 meters (including probe and extension cable).
Q5: Is this sensor compatible with older Bently Nevada systems?
A5: Yes, it is a direct replacement for 7200 25 mm and 35 mm systems.
Q6: What output voltage does it provide?
A6: The sensor outputs from -1.5 Vdc to -11.5 Vdc over its linear range.
Q7: How is EMI/RFI interference handled?
A7: The sensor is designed with high immunity, complying with CE mark standards.
Q8: Can I use this in hazardous area environments?
A8: Yes, it is certified for use in Class I, Zone 0/2 environments.
Q9: What mounting options are available?
A9: Both DIN rail and panel mounting are supported.
Q10: What maintenance is recommended?
A10: Periodic verification using the sliding bracket and dial indicator kit.
Related Models (Same Series or Function)
| Model Number | Description | Cable Length | Weight |
|---|---|---|---|
| 330851-01-000-020-10-00-05 | 25 mm Probe, 1¼-12 thread, 2.0 in. case | 1.0 m | 0.230 kg |
| 330851-02-000-080-10-00-05 | 25 mm Probe, M30x2 thread, 8.0 in. case | 5.0 m | 0.410 kg |
| 330854-040-24-00 | Extension Cable, FluidLoc High Temp | 4.0 m | 0.180 kg |
| 330854-080-25-00 | Armored Extension Cable, High Temp | 8.0 m | 1.120 kg |
| 330853-01-00 | Short Sliding Bracket for DE application | – | 0.580 kg |
| 330850-50-00 | Proximitor Sensor, 5.0 m length, panel mount | 5.0 m | 0.255 kg |
Popular Bently Nevada Models
| Model Number | Description | Application | Weight |
|---|---|---|---|
| 3300/55-01-04 | Velocity Monitor | Vibration Monitoring | 0.38 kg |
| 3500/42M-01-00 | Proximitor Seismic Monitor | Shaft Vibration/Position | 0.30 kg |
| 3500/22M | Transient Data Interface | System Diagnostics | 0.50 kg |
| 3500/40M | Proximitor Monitor | Rotor Position Monitoring | 0.32 kg |
| 3500/33 | 16-Channel Relay Module | Alarm Relay Output | 0.45 kg |
| 3500/25 | Keyphasor Module | Phase Reference Input | 0.36 kg |
