Bently Nevada

Bently Nevada 330851-02-000-070-90-00-05 3300 XL 25 mm Proximity Probe

SKU 330851-02-000-070-90-00-05

In stock
  • 12-month warranty
  • Free returns within 30 days
  • Manufacturer: Bently Nevada

  • Product No.: 330851-02-000-070-90-00-05

  • Country of origin:United States

  • Product Type: Proximity Probes

  • Barcode: 8537101190

  • Payment: T/T, Western Union

  • Weight: 590g

  • Dimensions: 70 mm x 30 mm x 30 mm (H x W x D)

  • Shipping port: Xiamen

  • Warranty: 12 months

Description

The Bently Nevada 330851-02-000-070-90-00-05 is a non-contacting proximity probe belonging to the 3300 XL 25 mm Proximity Transducer System. Designed for differential expansion (DE) measurements on mid-size to large steam turbine generators, the probe observes target movement caused by growth rate differences between the turbine rotor and machine stator. It provides standard sensitivity output over its linear range when connected to a compatible extension cable and Proximitor Sensor. Built with a specialized FluidLoc cable and high-temperature ClickLoc connector, the probe withstands harsh thermal and moisture conditions inside turbine casings.

Features

  • M30x2 metric threaded stainless steel case with standard locknut featuring predrilled safety wire holes
  • FluidLoc triaxial cable design preventing moisture ingress into the probe tip
  • High-temperature ClickLoc connector with removable collar to simplify routing in tight clearances
  • Continuous operating temperature rating up to 200 degC (392 degF)
  • Polyetheretherketone (PEEK) tip material with Viton O-ring compression seal for differential pressure sealing

Applications

  • Steam turbine generator differential expansion (DE) monitoring
  • Single transducer collar measurements
  • Complementary input transducer opposite-side collar measurements
  • Ramp target differential expansion tracking on turbine rotors

Ordering Information

Part Number Description
330851-02-000-070-90-00-05 3300 XL 25 mm Proximity Probe
02 Probe Case Type Option: M30x2 thread
000 Unthreaded Length Option: 0 mm
070 Overall Case Length Option: 70 mm
90 Total Length Option: 9.0 metres (29.5 feet)
00 Armor Option: No Armor
05 Agency Approval Option: Multiple Approvals

Technical Specifications

Parameter Specification
Manufacturer Bently Nevada
Model 330851-02-000-070-90-00-05
System 3300 XL 25 mm Proximity Transducer System
Probe Tip Material Polyetheretherketone (PEEK)
Probe Case Material AISI 304 stainless steel (SST)
Probe Cable 75 ohm triaxial, PFA insulated FluidLoc probe cable
Total Length 9.0 metres (29.5 feet)
Linear Range 12.7 mm (500 mils), starting at approx. 0.63 mm (25 mils) to 13.33 mm (525 mils)
Average Scale Factor (ASF) 0.787 V/mm (20 mV/mil) nominal
Deviation from Best Fit Straight Line (DSL) Less than +/-0.31 mm (+/-12 mils)
Probe DC Resistance (9.0 m) 8.8 +/- 1.1 ohms (Center Conductor to Outer Conductor)
Recommended Minimum Target Size 61 mm (2.4 in) diameter flat target (AISI 4140 steel)
Tensile Strength 330 N (75 pounds) probe case to probe lead; 270 N (60 pounds) at probe lead to extension cable connector
Operating and Storage Temperature -35 degC to +200 degC (-31 degF to +392 degF)
Short Term Temperature +250 degC (+482 degF) maximum for less than 24 hours
Relative Humidity 100% condensing, non-submersible when connectors are protected
Sealing Viton O-ring and compression seal between probe tip and case

Installation Guidelines

  • Tighten M30x2 threaded probe case locknuts to the recommended torque of 68 N-m (50 ft-lb); do not exceed the maximum rated torque of 163 N-m (120 ft-lb).
  • Maintain a minimum cable bend radius of 25.4 mm (1.0 in).
  • Secure connectors finger-tight; do not exceed 0.565 N-m (5 in-lb) connector torque.
  • Always install connector protectors to ensure 100% condensing humidity sealing and protect contacts against contamination.
  • Ensure target size meets or exceeds 61 mm (2.4 in) diameter flat AISI 4140 steel surface.

Compliance and Certifications

Certification / Standard Details
EMC Directive 2014/30/EU; EN 61000-6-2, EN 61000-6-4
RoHS Directive 2011/65/EU; China RoHS EFUP 15 years (SJ/T 11364-2024)
Maritime ABS Rules for Conditions of Classification
cNRTLus (Intrinsically Safe - ia) Class I, Zone 0: AEx/Ex ia IIC T5...T1 Ga; Class I, Groups A, B, C, D; Class II, Groups E, F, G; Class III
cNRTLus (Non-Incendive - nA, ec) Class I, Zone 2: AEx/Ex nA IIC T5...T1 Gc / AEx/Ex ec IIC T5...T1 Gc; Class I, Division 2, Groups A, B, C, D
ATEX/IECEx (ia) II 1 G Ex ia IIC T5...T1 Ga; II 1 D Ex ia IIIC T90 degC...T280 degC Dc
ATEX/IECEx (nA, ec) II 3 G Ex nA IIC T5...T1 Gc; Ex ec IIC T5...T1 Gc

FAQ

What target material is required for the probe to maintain calibrated accuracy?

The probe system is factory calibrated to a Bently Nevada supplied AISI 4140 steel target measuring 61 mm (2.4 in) diameter or larger.

What is the linear measurement range of the 25 mm proximity probe system?

The total linear measurement range is 12.7 mm (500 mils), operating from 0.63 mm to 13.33 mm (25 to 525 mils) gap distance.

What cable length option is configured on this specific model?

This probe features Option 90, which designates a 9.0 metre (29.5 feet) total length FluidLoc probe cable.

View all FAQs →

Product Documentation

Technical Datasheet (PDF) Complete specifications and technical drawings.

Technical Datasheet

Bently Nevada 330851-02-000-070-90-00-05 3300 XL 25 mm Proximity Probe

Quantity
Shipping & Returns

Global Express Shipping

  • Standard Delivery: 4–6 business days via DHL, FedEx, and UPS.
  • Express Dispatch: Same-day dispatch for in-stock orders placed before 2:00 PM (GMT+8).
  • Worldwide Coverage: Serving over 150 countries.

Returns & Warranty

  • 30-Day Guarantee: Returns accepted for in-stock products in original, factory-sealed packaging.
  • 12-Month Warranty: Every industrial component is backed by our technical warranty.
Reviews
1 of 3
Only 4 item(s) left in stock
Quantity
View full details

Global Express Shipping

  • Standard Delivery: 4-6 Business Days via DHL, FedEx, and UPS.
  • Express Dispatch: Same-day dispatch for in-stock orders placed before 2:00 PM (GMT+8).
  • Worldwide Coverage: Serving over 150 countries, including rapid delivery to Saudi Arabia and UAE.

Returns & Warranty

  • 30-Day Guarantee: Returns accepted for in-stock products in original, factory-sealed packaging.
  • 12-Month Warranty: Every industrial component is backed by our professional technical warranty.

Orders are processed and delivered Monday-Friday (excluding public holidays).


For full eligibility, restocking fees, and international return details, please view our official Refund & Return Policy .

TECHNICAL SPECIFICATIONS

Color pattern
Black
Country of origin
United States

Technical knowledge

Light-On and Dark-On Photoelectric Sensor Logic

Learn how light-on and dark-on photoelectric sensor modes interact with through-beam, retroreflective, and diffuse sensing, PNP/NPN wiring, PLC logic, commissioning, and fault detection.

Designing H-Bridge Motor Drives Without Shoot-Through

A practical guide to H-bridge motor drives covering switching states, dead time, inductive current paths, PWM choices, protection, PCB layout, PLC interfacing, and staged commissioning tests.

Designing Mitsubishi FX PLC Sequences with STL and RET

Learn how Mitsubishi FX PLC STL and RET instructions structure conveyor and pneumatic sequences, with practical state design, transition logic, timeouts, diagnostics, and safe restart boundaries.

Selecting and Troubleshooting DIN Valve Connectors

A practical guide to selecting, wiring and diagnosing DIN-style valve connectors, including form identification, coil voltage, suppression, polarity, sealing, release-time effects and commissioning...

PLC or Microcontroller for Arc-Welding Motion Control?

A PLC and a microcontroller can both generate step-and-direction motion, but arc welding exposes major differences in EMC, I/O protection, diagnostics, maintainability, safety integration, and...

Piezo Pneumatic Valves: Precision, Power, and Design Limits

Piezo pneumatic valves offer low holding power and fine proportional control, but they are not universal solenoid replacements. This guide covers driver electronics, flow limits, contamination, fail...