330878-90-00 3300 XL 50 mm Proximitor Sensor

Overview

Place of Origin:	USA
Brand Name:	Bently Nevada
Model Number:	330878-90-00
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 330878-90-00 3300 XL 50 mm Proximitor Sensor is a high-performance eddy current displacement sensor designed for advanced industrial automation and machinery protection systems. As a core component of the 3300 XL 50 mm transducer system, the 330878-90-00 Proximitor Sensor works with a non-contacting 3300 XL 50 mm proximity probe and extension cable to deliver highly stable and accurate displacement measurements in critical rotating equipment. With a maximum linear range of 27.9 mm (1100 mils), this Proximitor Sensor is optimized for automation applications involving large steam turbines, generators, compressors, and heavy-duty rotating machinery where long axial or radial movement must be monitored reliably.

The 3300 XL 50 mm Proximitor Sensor features a robust A380 aluminum housing, a 50 Ω output resistance, and supports panel-mount installation with a total system length of 9.0 meters (29.5 feet). Designed for harsh industrial automation environments, it operates continuously from -51°C to +100°C and maintains storage integrity up to +105°C. The sensor provides a precise 0.394 V/mm (10 mV/mil) output, enabling seamless integration with existing condition monitoring systems and allowing straightforward upgrades from legacy 7200 or earlier 50 mm transducer platforms without modifying monitor configurations. With enhanced RFI/EMI immunity and stable signal performance, the 330878-90-00 Proximitor Sensor ensures long-term accuracy, reliability, and repeatability in automated machinery protection and process control systems.

Applications

Application 1: Differential Expansion Monitoring in Steam Turbines

In large steam turbine automation systems, the 330878-90-00 3300 XL 50 mm Proximitor Sensor is widely used for differential expansion (DE) measurement. Its 27.9 mm linear range allows accurate tracking of axial growth differences between the rotor and stator during startup and load changes. Using two sensors on a single collar supports redundant measurements within 27.9 mm, improving system reliability and reducing false trips in turbine control automation.

Application 2: Rotor Expansion Measurement in Power Generation

For rotor expansion (RX) monitoring in generators, this Proximitor Sensor provides continuous non-contact displacement feedback with 0.394 V/mm sensitivity. The long linear range supports total expansion measurements up to 56 mm when complementary mounting is applied, ensuring precise automation control during thermal transients and improving operational safety.

Application 3: Automated Machinery Protection Systems

Integrated into machinery protection racks, the 3300 XL 50 mm Proximitor Sensor delivers stable output through 50 Ω impedance and shielded triad wiring. This enables real-time automation logic to trigger alarms or shutdowns when displacement thresholds are exceeded, protecting high-value assets such as turbines and compressors.

Application 4: High-Temperature Industrial Automation Environments

With an operating range down to -51°C and up to +100°C, the 330878-90-00 sensor is suitable for automation systems installed near hot turbine casings or in fluctuating ambient conditions. This thermal tolerance ensures measurement stability where standard displacement sensors may drift or fail.

Application 5: Legacy System Upgrade in Automated Plants

Automation facilities upgrading from older 7200 or 50 mm integral systems can deploy the 3300 XL 50 mm Proximitor Sensor without altering monitor configurations. Identical output scaling minimizes commissioning time while improving measurement accuracy and system availability.

Specifications

Competitive Advantage

Competitive Advantage 1: Longest Linear Range in Its Class

With a 27.9 mm (1100 mils) linear range, the 330878-90-00 Proximitor Sensor outperforms standard proximity sensors typically limited to under 10 mm. This extended range reduces the number of sensors required in automation systems and supports complex expansion measurements with fewer installation constraints.

Competitive Advantage 2: High Signal Stability for Automation Control

The 50 Ω output resistance and optimized internal electronics provide excellent signal integrity over long cable runs up to 9.0 meters, reducing noise and improving data accuracy in automated condition monitoring networks.

Competitive Advantage 3: Superior Environmental Robustness

Constructed with A380 aluminum and rated for -51°C to +100°C operation, this Proximitor Sensor maintains accuracy in harsh industrial automation environments, lowering maintenance frequency and total cost of ownership.

Competitive Advantage 4: Seamless System Compatibility

Identical 0.394 V/mm output scaling ensures direct compatibility with existing automation monitors and control logic. This advantage significantly reduces retrofit costs and eliminates the need for software or hardware reconfiguration during upgrades.

Competitive Advantage 5: Optimized Installation and Wiring Efficiency

Support for 0.2 to 1.5 mm² (16–24 AWG) shielded triad wiring and compact panel-mount design enables dense automation cabinet layouts. Faster installation and improved EMI immunity enhance overall system uptime and reliability in modern automated plants.