Bently Nevada's 3300 Series proximity sensing system, particularly the XL Series, is renowned for its innovative modular design. The XL system's probes, extension cables, and proximitor sensors are fully interchangeable, requiring no matching or calibration, simplifying installation and maintenance.
The 3300 Series Proximity Transducer System outputs a voltage proportional to the distance between the probe tip and the conductive surface. It can simultaneously measure both static position and dynamic vibration in machinery, and is widely used in applications such as fluid bearings, keyphasor references, and speed measurement.
The 3300 5mm Proximity Probe, Sensor and Transducer System is designed for tight installations where space is limited. The system includes the 3300 5mm probe, 3300 XL 5mm extension cable, and 3300 XL 5mm proximity sensor.
Functional Advantages:
Smaller size facilitates installation in confined spaces.
TipLoc tip-fixing technology and FluidLoc leak-proof options enhance robustness and reliability.
The 3300 XL 8mm Proximity Probe, Sensor and Transducer System delivers industry-leading performance, fully complying with the stringent API 670 (4th Edition) standards for mechanical configuration, linear range, accuracy, and temperature stability.
Components include the 3300 XL 8mm probe, 3300 XL 8mm extension cable, and 3300 XL 8mm proximity sensor.
Key Features:
Enhanced RFI/EMI suppression.
Supports both DIN rail and panel mounting options, ideal for high-density wiring environments at a lower cost.
Gold-plated ClickLoc quick connectors, TipLoc/CableLoc technology, and optional FluidLoc ensure secure, leak-proof connections.
The 3300 XL 11mm Proximity Probe, Sensor and Transducer System is designed for applications requiring an extended linear range. Components include the 3300 XL 11mm probe, 3300 XL 11 mm extension cable, and 3300 XL 11mm proximity sensor.
Outstanding Performance:
Linear measurement range up to 4 mm (160 mils).
Output of 3.94 V/mm (100 mV/mil).
Suitable for machinery such as reciprocating compressors, gear speed measurement, and power plant turbines.
Like the 8 mm system, it supports DIN rail or panel mounting and offers excellent EMI/RFI suppression.
High-Voltage and Special Environment Options
High-Voltage Feedthrough: Accepts 3300 XL 5mm, 8 mm, and 11 mm probes, enabling safe routing of probe cables outside high-voltage enclosures.
Submersible Probe: Designed for prolonged immersion in liquid environments (hydropower plants, wastewater treatment), can withstand pressures up to 500 psi, though not suitable for saltwater use.
System Installation and Calibration Tools
The 3300 XL Precision Micrometer and Shaft Micrometer ensure accurate calibration of the system's linear range and ASF (Average Scale Factor), supporting probe sizes from 5 mm to 11 mm.
Donald E. Bently (1924–2012), founder of Bently Nevada, pioneered the commercialization of eddy current proximity sensors. This technology was later adopted by API as a standard for turbomachinery acceptance testing, forming the foundation of the industrial vibration monitoring industry.
Bently Nevada's 3300 and 3300 XL Series, offering probe sizes from 5 mm to 11 mm and high modularity, meet precise position and vibration measurement requirements in complex industrial applications. The XL series' enhancements — excellent electromagnetic compatibility, robust connection structure, and high-pressure/underwater adaptability — significantly improve both installation and operational reliability.