330850-51-00 3300 XL 25 mm Proximitor Sensor

Overview

Place of Origin:	USA
Brand Name:	Bently Nevada
Model Number:	330850-51-00
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 330850-51-00 3300 XL 25 mm Proximitor Sensor is a sophisticated signal conditioning unit engineered for high-precision, long-range displacement monitoring in industrial turbomachinery. As a specialized component of the Bently Nevada ecosystem, the 330850-51-00 3300 XL 25 mm Proximitor Sensor is specifically designed to work with 25 mm proximity probes to measure massive positional changes that standard vibration sensors cannot capture. This particular 330850-51-00 3300 XL 25 mm Proximitor Sensor configuration supports a 5.0-meter (16.4 feet) system length and features a robust panel-mount design for secure installation in instrument cabinets.

Operating on advanced eddy-current technology, the 330850-51-00 3300 XL 25 mm Proximitor Sensor converts the raw electromagnetic signal from the probe into a highly stable linear voltage. With a sensitivity of 0.787 V/mm (20 mV/mil), the 330850-51-00 3300 XL 25 mm Proximitor Sensor provides a staggering linear range of 12.7 mm (500 mils), which is essential for tracking thermal expansion in large steam turbines. The 330850-51-00 3300 XL 25 mm Proximitor Sensor is also equipped with "51" Agency Approvals, ensuring compliance with international safety standards like ATEX and IECEx for hazardous environments.

The mechanical design of the 330850-51-00 3300 XL 25 mm Proximitor Sensor emphasizes longevity and signal integrity. Housed in a durable A380 aluminum casing, the 330850-51-00 3300 XL 25 mm Proximitor Sensor provides exceptional resistance to electromagnetic interference (EMI) and physical shock. Because the 330850-51-00 3300 XL 25 mm Proximitor Sensor belongs to the 3300 XL family, it offers complete interchangeability with other 5-meter probes and extension cables, eliminating the need for tedious manual calibration.

Applications

The 330850-51-00 is primarily applied to monitor Differential Expansion (DE) in large-scale steam turbine generators. During startup and shutdown phases, the turbine rotor and casing expand at different rates due to their varied thermal masses. By utilizing its massive 12.7 mm linear range, this Proximitor sensor provides the wide measurement window necessary to track these axial shifts. This ensures that the rotating blades do not make contact with stationary components, thereby protecting the turbine from severe mechanical damage during thermal cycling.

In heavy industrial environments, the 330850-51-00 is used for Shell Expansion or Casing Expansion tracking. This involves measuring the absolute growth of the turbine housing relative to the machine's foundation. The sensor’s excellent amplitude linearity ensures that engineers can monitor whether the turbine's sliding feet are moving correctly. If the casing binds, it can cause severe structural stress and misalignment, which this sensor helps prevent by providing continuous, accurate growth data to the control system.

This Proximitor is also frequently utilized in centralized monitoring cabinets for balance-of-plant machinery in hazardous locations. Given its "51" Multiple Approvals rating, it is suitable for use in environments where explosive gases may be present, such as in petrochemical processing units. The panel-mount design allows for high-density installation alongside other 3300 XL series modules, providing a neat and reliable interface for transmitting displacement signals to PLCs or 3500 series monitoring racks over a 5.0-meter system length.

Specifications

Competitive Advantage

Unrivaled 12.7 mm Measurement Envelope The 330850-51-00 offers a 12.7 mm (500 mils) linear range, which is more than six times the range of standard 8 mm proximity systems. This provides a decisive competitive advantage for monitoring large-scale thermal growth, as it prevents signal "flatlining" during extreme expansion events, ensuring that critical safety data is never lost when the machine is at its most vulnerable.

Advanced A380 Aluminum EMI Shielding Constructed with a rugged A380 aluminum housing, this Proximitor sensor provides superior electromagnetic interference (EMI) protection compared to plastic-housed alternatives. This shielding is vital in power plant environments where large motors and generators can create significant electrical noise. The housing also offers a peak shock survivability of 5,000 g, ensuring the internal electronics remain stable in high-vibration zones.

Field-Interchangeable "Plug-and-Play" Technology A major advantage of the 3300 XL series is the elimination of the "matched set" requirement. The 330850-51-00 is fully interchangeable with any 3300 XL 25 mm probe and extension cable of the same 5.0-meter electrical length. This allows for rapid field replacement without the need for time-consuming bench calibration, significantly reducing maintenance downtime and simplifying spare parts logistics for global operators.