Bently Nevada 330780-90-CN 3300 XL 11 mm Proximitor Sensor

The Bently Nevada 330780-90-CN is part of the 3300 XL 11 mm Proximity Transducer System, specifically designed for measuring non-contact vibration and position in machinery using fluid film bearings. With a wider linear range compared to the 8 mm series, it is well-suited for thrust position, rod drop, and Keyphasor measurements.

Applications

• Axial (thrust) position monitoring on steam turbines

• Rod position or rod drop detection on reciprocating compressors

• Ramp differential expansion measurement

• Tachometer and phase reference (Keyphasor) signal acquisition

• High-accuracy vibration and displacement monitoring in harsh environments

Key Advantages

• Extended linear range of 4.0 mm

• High sensitivity: 3.94 V/mm (100 mV/mil)

• CE marked, strong RFI/EMI immunity

• Compact Proximitor Sensor with DIN or panel mount options

• Robust construction with stainless steel and PPS materials

• Suitable for SIL 2/3 functional safety applications

• Compatible with long cable runs up to 305 meters

Technical Specifications

Frequently Asked Questions (FAQ)

Q1: What is the main function of the 330780-90-CN Proximitor Sensor?

A1: It measures shaft vibration and displacement in non-contact applications using eddy current technology.

Q2: What is the output signal of the sensor?

A2: It outputs 3.94 V/mm (100 mV/mil), suitable for integration with Bently Nevada monitoring systems.

Q3: Can the sensor be used in hazardous areas?

A3: Yes, it has approvals for use in hazardous zones including Zone 0 and Zone 2.

Q4: Is this sensor compatible with older 7200 series systems?

A4: No. When upgrading from 7200-series, all components and monitoring systems must be replaced.

Q5: What is the benefit of using an 11 mm probe over 8 mm?

A5: The 11 mm probe provides a longer linear range, making it ideal for thrust and rod drop measurements.

Q6: How long can the system wiring be?

A6: Up to 305 meters of field wiring is supported from the sensor to the monitoring system.

Q7: What type of cable does the system use?

A7: It uses a 75 Ω triaxial FEP-insulated cable, with options for armor and FluidLoc.

Q8: Can this sensor withstand high temperatures?

A8: Yes, the probe can handle up to +177°C, and the Proximitor Sensor can handle up to +100°C.

Q9: What is the mounting type of this model?

A9: The 330780-90-CN comes with a 9.0 m system length and panel mount hardware.

Q10: Does the sensor require recalibration for different materials?

A10: Yes, the sensor is factory calibrated to AISI 4140 steel but can be calibrated to other materials upon request.