The Bently Nevada 330850-51-CN is part of the 3300 XL 25 mm Proximity Transducer System, specifically designed to measure Differential Expansion (DE) in large steam turbines. It offers a 0.787 V/mm (20 mV/mil) output and supports reliable, high-accuracy operation in harsh conditions such as high temperature and electromagnetic environments.

Technical Specifications

Applications

• Monitoring differential expansion in steam turbines

• Suitable for mid-size to large rotating machinery

• Used in harsh environments such as power plants and industrial facilities

• Ideal for replacing legacy 7200 series DE transducers

Product Advantages

• High accuracy with wide linear range (12.7 mm)

• Improved EMI/RFI immunity for reliable operation

• SpringLoc terminals for quick and secure wiring

• Rugged design withstands up to 250°C intermittent heat

• Fully backward compatible with older systems

• Flexible mounting options including DIN and panel

FAQ

Q1: What is the linear range of this sensor?

A1: It supports a linear measurement range of 12.7 mm (500 mils).

Q2: Is it compatible with 7200 series systems?

A2: Yes, it’s designed to replace 7200 25 mm and 35 mm systems.

Q3: What is the standard output sensitivity?

A3: The nominal scale factor is 0.787 V/mm (20 mV/mil).

Q4: Can it withstand high temperatures?

A4: Yes, continuous operation up to 200°C and intermittent up to 250°C.

Q5: What is the required power supply?

A5: It requires -17.5 Vdc to -26 Vdc with a max of 12 mA.

Q6: Does it support DIN rail mounting?

A6: Yes, 330850-51-CN is the DIN rail version.

Q7: What material is used for the probe tip?

A7: Polyetheretherketone (PEEK) for high thermal stability.

Q8: Is special calibration available?

A8: Yes, factory calibration for different target materials is optional.

Q9: What type of connector does it use?

A9: ClickLoc connectors with gold-plated contacts.

Q10: Is it suitable for humid environments?

A10: Yes, the system tolerates 100% condensing humidity (non-submersible).