Introduction

The 330100-90-00 Proximitor Sensor is part of Bently Nevada’s trusted 3300 series, engineered for high-accuracy displacement measurements in demanding rotating-equipment environments. Known for its rock-solid stability, this sensor provides operators with a reliable diagnostic foundation, enabling early detection of mechanical degradation. With its robust design, consistent linearity, and proven system compatibility, it remains a preferred choice for turbomachinery protection and performance optimization.

Technical Specifications

Parameter	Details
Model	Bently Nevada 330100-90-00
Series	3300 Proximitor
Type	Proximity / Displacement Sensor
Total Length	9.0 m
Weight	0.25 kg
Compatibility	3300 Monitoring System
Measurement Principle	Eddy-current displacement

Recommended Related Models

Model	Description
330100-00-00	Standard Proximitor Sensor, alternate length
330100-05-00	Proximitor with medium-length cable
330100-20-00	High-performance version for long cable runs
330103-00-04	Prox probe with different tip configuration
330130-040-00	Standard proximity probe for general vibration monitoring
330171-00-12	Extension cable compatible with 3300 system
330180-51-00	High-temperature proximity probe
330190-AXX-XX	Industrial extension cable series
330980-50-00	Proximitor for specialized OEM machinery
330185-01-00	Alternative eddy-current proximity sensor

Popular Related Models

Model	Description
330104-00-04	Widely used probe for critical rotating machines
330105-02-12	High-performance probe for severe environments
330130-065-00	Standard industrial proximity probe
330180-90-00	Robust probe for high-temperature areas
330171-50-00	Common extension cable for 3300 systems
330107-00-10	Probe with optimized sensitivity profile
330100-XX-XX	General Proximitor family variants
330103-00-07	Turbine-grade proximity probe
330178-00-05	Specialized probe for OEM compressor systems
330190-08-10	Extension cable for long-distance routing

Applications

The Bently Nevada 330100-90-00 Proximitor Sensor is widely used across critical rotating machinery environments where stable shaft-vibration and position feedback is required. It integrates seamlessly into the 3300 monitoring platform, providing dependable measurements even in challenging oil-film, high-temperature, or high-speed operating zones. Typical applications include steam turbines, gas turbines, centrifugal compressors, large pumps, and industrial fans.

Advantages

Precision measurement stability with excellent linearity for shaft motion monitoring
Optimized for harsh industrial environments, offering strong immunity to electrical noise
Consistent performance across long cable lengths, maintaining signal accuracy
Supports proactive maintenance strategies by providing clean, interpretable vibration trends
Reliable long-term drift resistance, ensuring years of measurement consistency without recalibration

FAQs

What is the typical linear range of the 330100-90-00?
It supports the standard 3300 system linear range of approximately 2 mm of dynamic displacement.
How does it maintain accuracy with a 9-meter cable?
The Proximitor electronics compensate for cable length, preserving calibration and sensitivity over the full extension.
What is the usable frequency response?
The sensor typically handles vibration frequencies up to several kHz, suitable for high-speed rotating equipment.
How does the system deal with EMI in harsh installations?
Shielded cabling, grounded architecture, and differential measurement techniques minimize interference.
Which target materials ensure the best linearity?
4140 steel or other standard ferromagnetic machine shaft materials yield the most accurate results.
Is it backward compatible with older 3300 systems?
Yes, the 330100 series is specifically engineered to work seamlessly with the classic 3300 monitors.
How does temperature variation influence output?
Temperature compensation inside the Proximitor minimizes drift across typical machine enclosure temperatures.
What is the expected long-term drift of sensitivity?
Drift is generally very low, remaining within Bently Nevada's published system tolerances over several years.
How fast does the sensor respond to rapid shaft movements?
Its electronic response is effectively instantaneous for machine-condition monitoring purposes, tracking fast transients.
What grounding method gives the lowest noise?
Using single-point grounding at the monitor end with proper shield termination yields optimal signal quality.