330850-91-00 3300 XL 25 mm Proximitor Sensor

Overview

Place of Origin:	USA
Brand Name:	Bently Nevada
Model Number:	330850-91-00
Minimum Order Quantity:	1
Packaging Details:	Original new Factory Sealed
Delivery Time:	5-7 days
Payment Terms:	T/T
Supply Ability:	In stock

Quick Detail

Description

The 330850-91-00 3300 XL 25 mm Proximitor Sensor is a high-performance signal conditioning device engineered by Bently Nevada, tailored for ultra-large displacement measurement in critical heavy rotating machinery. As a core component of the 3300 XL series ecosystem, this 3300 XL 25 mm Proximitor Sensor works in tandem with a dedicated 25 mm proximity probe and extension cable to form a complete transducer loop, delivering unparalleled precision for monitoring mechanical expansion and position metrics that standard sensors cannot capture. Manufactured in the USA and supplied in original factory-sealed packaging, this 3300 XL 25 mm Proximitor Sensor embodies Bently Nevada’s expertise in industrial condition monitoring, offering robust, calibration-free operation for non-hazardous and certified industrial environments alike.

Equipped with an optimized output sensitivity of 0.783 V/mm (20 mV/mil), the 330850-91-00 3300 XL 25 mm Proximitor Sensor boasts an industry-leading linear measurement range of 12.7 mm (500 mils)—six times wider than standard 8 mm proximity sensor systems. This extended range enables the 3300 XL 25 mm Proximitor Sensor to track substantial positional shifts, making it the ideal solution for monitoring differential expansion (DE) in mid-size to large-scale steam turbine generators. During turbine startup and thermal cycling, the rotor and stator expand at different rates due to varying thermal masses; the 3300 XL 25 mm Proximitor Sensor provides real-time, high-fidelity data to ensure axial clearances between rotating and stationary components stay within safe operating limits, preventing catastrophic internal contact and unplanned downtime.

Applications

The 330850-91-00 3300 XL 25 mm Proximitor Sensor is primarily deployed for differential expansion (DE) monitoring in large steam turbine generators, a critical application where standard sensors lack sufficient measurement range. During turbine startup, shutdown, and load changes, the sensor’s 12.7 mm linear range accurately tracks the differential growth rates of the rotor and stator, ensuring axial clearances between turbine blades and stationary nozzles remain within safe thresholds to avoid catastrophic internal rubbing and costly equipment damage.

This 3300 XL 25 mm Proximitor Sensor is also widely used for casing expansion and thermal growth tracking in heavy industrial machinery, including gas turbines and large compressors. It measures the absolute expansion of turbine housings relative to fixed foundations, providing precise data to verify that sliding feet and expansion joints are functioning freely. With ± 0.25 mm amplitude linearity, the sensor detects subtle binding or misalignment issues that could lead to structural stress, enabling proactive maintenance to extend machinery service life.

For centralized industrial control environments, the 330850-91-00 3300 XL 25 mm Proximitor Sensor’s DIN rail mounting design makes it ideal for integration into weather-tight instrument enclosures and control shacks near critical machinery. Its compact size allows high-density installation with other 3300 XL series monitors, while its 9.0-meter system length supports flexible wiring layouts for large power plants and manufacturing facilities. The sensor’s robust aluminum construction and 735 m/s² (75 g) peak acceleration tolerance ensure stable performance even in high-vibration industrial settings.

Specifications

Competitive Advantage

1.Industry-Leading 12.7 mm Linear Measurement Range

The 330850-91-00 3300 XL 25 mm Proximitor Sensor offers a 12.7 mm (500 mils) linear range—six times wider than standard 8 mm proximity sensor systems—making it uniquely suited for monitoring large-scale displacement in heavy rotating machinery like steam turbines. This extended range eliminates signal “flatlining” during extreme thermal expansion, providing continuous, reliable data throughout the full operating cycle of critical equipment.

2.Exceptional Measurement Precision and Thermal Stability

With ± 0.25 mm amplitude linearity and an operating temperature range of -45°C to +100°C, this 3300 XL 25 mm Proximitor Sensor maintains high accuracy from cold startup to full-load operation. Unlike competing sensors that suffer from thermal drift in harsh power plant environments, it delivers consistent, high-confidence data for critical decision-making, reducing the risk of false alarms and unplanned maintenance.

3.Rugged Construction for Harsh Industrial Environments

Constructed with a durable A350 aluminum case, the 330850-91-00 3300 XL 25 mm Proximitor Sensor provides superior EMI shielding and physical protection compared to sensors with plastic or composite housings. It withstands up to 49,050 m/s² (5000 g) peak shock and 735 m/s² (75 g) peak acceleration, ensuring long-term reliability even when mounted directly on high-vibration machinery frames.