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- Overview
- Quick Detail
- Description
- Applications
- Specifications
- Competitive Advantage
- Recommended Products
Overview
Place of Origin: |
USA |
Brand Name: |
Bently Nevada |
Model Number: |
330850-51-00 |
Packaging Details: |
Original new Factory Sealed |
Delivery Time: |
5-7 days |
Payment Terms: |
T/T |
Supply Ability: |
In stock |
Quick Detail
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Total Length and Mounting Option : |
5.0 metres (16.4 feet) system length, DIN mount |
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Agency Approval Option: |
No Approvals |
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Dimension: |
8.6x3.5x7cm |
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Weight: |
0.22kg |
Description
The 330850-51-00 3300 XL 25 mm Proximitor Sensor is a DIN-mount eddy-current signal conditioner designed for turbine monitoring and automated plant control systems. The 330850-51-00 3300 XL 25 mm Proximitor Sensor accepts one non-contact 25 mm probe with extension cable and converts axial shaft displacement into a 0.787 V/mm signal across a 12.7 mm linear range. Operating on −17.5 to −26 Vdc at 12 mA and providing a 50 Ω output resistance, the 330850-51-00 3300 XL 25 mm Proximitor Sensor transmits accurate readings to DCS or PLC systems over long cable runs. Its A380 aluminum housing supports operating temperatures from −51°C to +100°C and 100% condensing humidity when connectors are protected, ensuring continuous measurement of rotor growth or differential expansion in steam turbines. The 330850-51-00 3300 XL 25 mm Proximitor Sensor integrates with automated protection and vibration monitoring loops, allowing control systems to verify axial rotor movement during startup, shutdown, or load changes. With low supply sensitivity (<2 mV/V), the 330850-51-00 3300 XL 25 mm Proximitor Sensor maintains precise voltage output under fluctuating DC supply, enabling reliable automation actions.
Applications
Differential expansion monitoring in steam turbines
The 330850-51-00 3300 XL 25 mm Proximitor Sensor measures rotor-to-casing axial movement. Its 12.7 mm linear range allows operators to track shaft growth and set alarm thresholds for automated turbine protection.
Generator shaft position tracking
By sending a 0.787 V/mm output to PLCs or DCS, the 330850-51-00 3300 XL 25 mm Proximitor Sensor enables real-time monitoring of shaft position during startup, shutdown, and load changes.
Compressor rotor movement observation
The 330850-51-00 3300 XL 25 mm Proximitor Sensor monitors rotor collars or ramps in compressors. Its temperature rating up to +100°C and sealed aluminum housing allows operation near high-temperature machinery without signal loss.
Specifications
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Proximitor Sensor Input: |
Accepts one noncontacting 3300 XL 25 mm Proximity Probe and Extension Cable. |
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Power: |
Requires -17.5 Vdc to -26 Vdc without barriers at 12 mA maximum consumption, -23 Vdc to -26 Vdc with barriers. Operation at a more positive voltage than -23.5 Vdc can result in reduced linear range. |
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Supply Sensitivity: |
Less than 2 mV change in output voltage per volt change in input voltage. |
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Output resistance: |
50 W |
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Proximitor Sensor Material: |
A380 aluminum |
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Operating Temperature: |
-51°C to +100°C (-60°F to +212°F) |
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Storage Temperature : |
-51°C to +105°C (-60°F to +221°F) |
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Relative Humidity: |
100% condensing, non-submersible when connectors are protected. Tested to IEC 68-2-3 damp heat |
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Proximitor Sensor Input: |
Accepts one noncontacting 3300 XL 25 mm Proximity Probe and Extension Cable. |
|
Power: |
Requires -17.5 Vdc to -26 Vdc without barriers at 12 mA maximum consumption, -23 Vdc to -26 Vdc with barriers. Operation at a more positive voltage than -23.5 Vdc can result in reduced linear range. |
|
Supply Sensitivity: |
Less than 2 mV change in output voltage per volt change in input voltage. |
|
Output resistance: |
50 W |
Competitive Advantage
Long-distance signal transmission
The 50 Ω output of the 330850-51-00 3300 XL 25 mm Proximitor Sensor supports direct wiring from turbine deck to control room panels without amplifiers, maintaining signal accuracy across long cable runs.
High-temperature operation near machinery
The 330850-51-00 3300 XL 25 mm Proximitor Sensor operates continuously up to +100°C and intermittently to +105°C, allowing installation close to thrust bearings or rotor assemblies.
Low supply sensitivity under DC fluctuation
With less than 2 mV/V supply sensitivity, the 330850-51-00 3300 XL 25 mm Proximitor Sensor maintains accurate 0.787 V/mm readings during plant −24 Vdc power variations, ensuring reliable control actions.
Humidity tolerance in turbine halls
Sealed and protected connectors allow the 330850-51-00 3300 XL 25 mm Proximitor Sensor to measure shaft movement in 100% condensing humidity environments without additional enclosures.
