330878-50-00 3300 XL 50 mm Proximitor Sensor

Overview

Place of Origin:	USA
Brand Name:	Bently Nevada
Model Number:	330878-50-00
Packaging Details:	Original new Factory Sealed
Delivery Time:	5-7 days
Payment Terms:	T/T
Supply Ability:	In stock

Quick Detail

Description

The 330878-50-00 3300 XL 50 mm Proximitor Sensor is an advanced, high-precision eddy current transducer system designed for measuring large-scale rotor movements and differential expansion (DE) in steam turbine generators and large industrial machinery. This system consists of a 50 mm XL Proximity Probe, a high-temperature extension cable, and the 3300 XL 50 mm Proximitor Sensor, providing the longest linear range in the 3300 XL series at 27.9 mm (1100 mils). The system’s panel-mountable Proximitor Sensor, constructed from A380 aluminum, operates reliably in harsh environments from -51°C to +100°C (-60°F to +212°F) and delivers a 0.394 V/mm (10 mV/mil) output, fully compatible with legacy 7200 and 50 mm DE Integral systems.

The 50 mm probe is engineered for extreme DE environments, withstanding continuous high temperatures up to 200°C (392°F) and intermittent spikes up to 250°C (482°F). A dual-seal design combined with a High Temperature FluidLoc cable ensures moisture resistance, while ClickLoc connectors with removable collars facilitate routing through tight spaces. The system supports various probe configurations, including straight exit (½-20 or M14x1.5 threads) and side exit variants, with an overall case diameter of 1.99 inches. The Proximitor Sensor is optimized for high-density DIN-rail or traditional panel mounting, featuring RFI/EMI immunity and SpringLoc terminal strips for robust and rapid field wiring.

The 3300 XL 50 mm Transducer System is ideal for monitoring rotor expansion, differential growth between rotor and stator, and axial thrust movement in large steam turbines and industrial compressors, providing precise, industry-standard signals for control systems, protection, and predictive maintenance.

Applications

Differential Expansion Measurement
Measures the axial growth difference between turbine rotors and casings using two proximity transducers, supporting DE ranges up to 27.9 mm.

Axial Thrust Measurement
Detects axial displacement at thrust bearings, providing 4-20 mA proportional signals for turbine control and protection systems.

Retrofit and Upgrade of Legacy Systems
Fully compatible with 7200 and 50 mm DE Integral systems, enabling seamless replacement without monitor reconfiguration.

Harsh Environment Operation
Supports continuous high-temperature operation up to 200°C (392°F) and intermittent spikes up to 250°C (482°F), with moisture-proof design for challenging industrial conditions.

Specifications

Competitive Advantage

Longest Linear Range
27.9 mm (1100 mils) linear range allows measurement of large differential expansions, surpassing all other 3300 XL probes.

High-Temperature Resilience
Continuous operation up to 200°C and intermittent spikes to 250°C ensure reliability in steam turbines and extreme environments.

Moisture and Contaminant Protection
Dual-seal probe design with High Temperature FluidLoc cable prevents water, oil, or other liquids from entering the probe tip.

RFI/EMI Immunity and Easy Installation
Proximitor Sensor CE-mark approved with advanced RFI/EMI immunity and SpringLoc terminal strips for quick, secure field wiring.

Legacy System Compatibility
Output voltage of 0.394 V/mm (10 mV/mil) ensures seamless integration with 7200 and 50 mm DE Integral systems, simplifying upgrades and minimizing downtime.