330850-91-05 3300 XL 25 mm Proximitor Sensor

Overview

Place of Origin:	USA
Brand Name:	Bently Nevada
Model Number:	330850-91-05
Packaging Details:	Original new Factory Sealed
Delivery Time:	5-7 days
Payment Terms:	T/T
Supply Ability:	In stock

Quick Detail

Description

330850-91-05 is a 3300 XL 25 mm Proximitor Sensor designed for automation systems that monitor large rotating machinery where long-range displacement measurement is required. 330850-91-05 works with one 3300 XL 25 mm proximity probe and extension cable to convert probe signals into a standardized voltage output for PLC, DCS, and machinery protection systems. With a system sensitivity of 0.787 V/mm (20 mV/mil) and a linear range of 12.7 mm (500 mils), 330850-91-05 supports differential expansion measurement on mid-size and large steam turbine generators.

Configured for a 9.0 meter (29.5 ft) system length and panel mounting, 330850-91-05 operates on a supply range of -17.5 Vdc to -26 Vdc at a maximum current of 12 mA. When used with barriers, 330850-91-05 requires -23 Vdc to -26 Vdc to maintain the defined linear range. The output resistance of 330850-91-05 is 50 Ω, and supply sensitivity is controlled to less than 2 mV per volt of input variation, supporting accurate signal transfer in automated monitoring loops.

Housed in an A380 aluminum enclosure, 330850-91-05 operates from -51°C to +100°C and withstands 100% condensing humidity when connectors are protected. Multiple agency approvals allow 330850-91-05 to be applied in regulated industrial automation environments focused on turbine expansion, axial movement, and long-travel displacement measurement.

Applications

Differential Expansion Monitoring on Steam Turbines
330850-91-05 is applied with two 3300 XL 25 mm proximity probes to measure differential expansion between the turbine rotor and casing. Using the 12.7 mm linear range and 0.787 V/mm output scaling, 330850-91-05 allows automation systems to track axial growth during cold start, warm-up, and load increase sequences and to trigger alarms when expansion approaches defined limits.

Axial Shaft Movement Measurement at Thrust Bearings
Installed at thrust bearing locations, 330850-91-05 measures axial shaft travel on large steam turbine generators and compressors. The 50 Ω output resistance and supply sensitivity below 2 mV per volt allow 330850-91-05 to deliver controlled displacement signals to PLC and turbine protection systems without distortion caused by power variation.

Long-Travel Displacement Measurement on Large Rotors
For large-frame rotating equipment where axial movement exceeds the range of standard sensors, 330850-91-05 provides long-travel displacement measurement through its 12.7 mm linear range. The 9.0 meter system length allows 330850-91-05 to be installed with extended probe and cable routing in large turbine halls.

Expansion Measurement in High-Temperature Turbine Zones
Operating within a sensor temperature range of -51°C to +100°C, 330850-91-05 supports expansion measurement in turbine environments exposed to elevated ambient temperatures. When paired with high-temperature 25 mm probes, 330850-91-05 enables automated monitoring near hot turbine casings.

Specifications

Competitive Advantage

Large Linear Measurement Window
The 12.7 mm linear range of 330850-91-05 supports direct measurement of large axial movement without signal clipping, allowing automation systems to define wider alarm and trip thresholds for turbine expansion control.

Low Output Change with Supply Variation
With less than 2 mV output change per volt of input supply variation, 330850-91-05 limits measurement deviation caused by power fluctuation in turbine control cabinets and field junction boxes.

Defined Electrical Output for Control Systems
The 50 Ω output resistance of 330850-91-05 supports predictable signal transfer to monitoring and protection modules, simplifying signal scaling and data processing in automation platforms.