Model: 330850‑50‑05Brand: Bently Nevada (Baker Hughes)Series: 3300 XL 25 mm Proximitor SystemCore Function: Eddy‑current signal conditioning, shaft position, differential expansion measurement for rotating machineryProduct Type: Proximitor Sensor (Proximity Monitor Preamplifier)Key Specifications: 25 mm system, 5 m total system length, 7.87 V/mm sensitivity, ‑17.5 ~ ‑26 VDC power supply, AISI‑4140 steel calibrated, DIN‑rail mountingObsolete Status: Obsolete / End‑of‑life
Product Overview
The Bently Nevada 330850‑50‑05 is a high‑performance proximitor sensor for the 3300 XL 25 mm non‑contact eddy‑current monitoring system. It conditions signals from 25 mm proximity probe and extension cable, converts gap distance between probe tip and rotating shaft target into proportional DC voltage output. Primarily applied for measuring large shaft differential expansion, axial position and displacement of heavy‑duty turbomachinery. Factory calibrated for AISI‑4140 steel target material, widely used as spare‑part for existing power, oil‑gas and petrochemical machinery protection systems本特利.
Series
3300 XL 25 mm Proximitor System Series. This large‑range eddy‑current measurement family is designed for differential expansion, thrust position and large‑displacement shaft monitoring, including probes, extension cables and proximitor sensors, compatible with Bently Nevada 3500, 3300 machinery monitoring racks.
Product Features
- Designed for 3300 XL 25 mm eddy‑current probe, total system length 5 meters
- Factory calibrated for AISI‑4140 steel target material
- Linear measurement range: 0.63 mm ~ 13.33 mm (25‑525 mils)
- Nominal sensitivity: 7.87 V/mm (200 mV/mil)
- Accepts direct input from proximity probe via high‑frequency microdot connector
- Reverse‑polarity protection, internal short‑circuit protection
- Aluminum alloy rugged housing, DIN‑rail or base‑plate mounting
- Output analog gap‑proportional voltage for machinery monitor rack input
- No safety‑barrier version for non‑hazardous cabinet installation
- Fully compatible with 3500 series machinery protection monitoring systems本特利
Product Parameters
表格
| Item | Value |
|---|---|
| Part Number | 330850‑50‑05 |
| System Type | 3300 XL 25 mm Proximitor Sensor |
| Total System Length | 5 m |
| Calibration Target | AISI‑4140 Steel |
| Sensitivity | 7.87 V/mm (200 mV/mil) |
| Linear Range | 0.63 mm ~ 13.33 mm |
| Power Supply | ‑17.5 VDC ~ ‑26 VDC, max 12 mA consumption |
| Output Impedance | 50 Ω |
| Connector Type | Microdot probe input; screw terminal signal output |
| Mounting | DIN‑rail / Base plate mounting |
| Housing Material | A380 Aluminum |
| Weight | 0.255 kg |
| Operating Temperature | ‑40 °C ~ +85 °C |
| Certifications | CE compliant |
| Origin | USA |
Product Specifications
- Output voltage range: approx ‑1.5 VDC ~ ‑11.5 VDC over full linear range
- Power supply effect: <2 mV output shift within allowable supply voltage range
- Mechanical: IP20, cabinet‑mount installation only
- Compatibility: Works with matching 25 mm probe and extension cable; interfaces to Bently Nevada 3500 monitor racks
- Lifecycle: Original manufacturing discontinued; available as surplus and refurbished spare‑part units
- Installation note: Complete system (probe‑cable‑proximitor) must keep matched total length for correct calibration本特利
Function
- Condition high‑frequency eddy‑current signal received from 25 mm proximity probe
- Convert physical probe‑to‑target gap distance into proportional DC analog voltage signal
- Provide over‑voltage and reverse‑polarity circuit protection for sensor loop
- Transmit displacement signal to 3500 / 3300 machinery monitoring rack for further processing
- Realize accurate differential expansion, shaft axial position measurement for large turbomachinery
Purpose
Realize non‑contact displacement measurement for heavy‑duty rotating equipment; measure turbine differential expansion and thrust shaft position; serve as critical spare‑part for turbomachinery protection cabinet maintenance and retrofit projects.
Application Fields
- Thermal power plant steam turbine differential expansion monitoring
- Combined‑cycle gas turbine machinery protection systems
- Oil & gas refinery large‑compressor condition‑monitoring cabinets
- Petrochemical plant turbomachinery safety monitoring spare‑part inventory
- Heavy‑industry captive power station turbine retrofitting projects
- General industrial large rotating‑machinery predictive‑maintenance monitoring systems
