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

• Differential Expansion (DE) measurement in turbine generators

• Rotor-stator movement monitoring

• High-temperature and high-vibration industrial environments

• Suitable for AISI 4140 steel and other target materials (on request)

Product Advantages

• Wide Linear Range: 12.7 mm range ensures precise DE monitoring

• High Temp Endurance: Probe operates continuously up to 200°C, short-term up to 250°C

• Field-Proven: Reliable even in harsh steam turbine environments

• System Compatibility: Direct upgrade path from 7200 and legacy systems

• Flexible Mounting: DIN or panel mounting options

• RFI/EMI Resistant: Immunity to electromagnetic noise ensures reliable output

Technical Specifications

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.