Bentley 330101-09-51-10-02-05 Eddy Current Probe Description

I. Product Overview

330101-09-51-10-02-05 is a 3300 XL 8mm standard non-armored eddy current probe from Baker Hughes (Bently Nevada), used for monitoring shaft vibration, axial displacement, phase angle / rotational speed of rotating machinery.

Thread: 3/8 - 24 UNF

Cable: Non-armored (standard)

Certification: CSA / ATEX / IECEx explosion-proof certification

It must be combined with the same series extension cable + preamplifier to form a complete 3300 XL system. 

II. Model Code Analysis (330101-09-51-10-02-05)

330101: 3300 XL 8mm probe, 3/8-24 UNF, non-armored

09: Length of non-threaded section 0.9 in (≈22.9 mm)

51: Total length of the housing 5.1 in (≈129.5 mm)

10: Cable length of the probe 1.0 m

02: Micro ClickLoc coaxial connector, standard non-armored cable

05: CSA / ATEX / IECEx explosion-proof certification

III. Core Electrical Parameters (for standard 8mm probe)

Sensitivity: 7.87 V/mm (200 mV/mil), linear error ≤ ±1%

Linear range: 2.0 mm (80 mil), effective range 0.25～2.3 mm

Frequency response: 0～10 kHz (+0/–3 dB)

Output signal: Combined with preamplifier -1 VDC ～ -17 VDC

DC resistance (1m cable): 7.59 Ω ±0.50 Ω

Minimum target surface diameter: 8.9 mm (0.35 in), recommended shaft diameter ≥50.8 mm

IV. Environment and Mechanics

Operating temperature: -52℃ ～ +177℃ (standard)

Protection level: Probe body IP54

Shell material: Stainless steel AISI 303/304; end PPS high-temperature resistant

Installation torque: 1.1～1.4 N·m

Cable bending radius: ≥3× cable diameter

V. Key Features

✅ Explosion-proof certification (05): Suitable for hazardous areas such as petrochemical, natural gas, etc.

✅ Medium-length housing (5.1 in): Suitable for medium-deep hole installation, balancing rigidity and space

✅ 1m standard non-armored cable: Common distance wiring, good flexibility, oil-resistant, and aging-resistant

✅ ClickLoc quick connector: Tool-free, reliable connection, simple maintenance

✅ API 670 compliant: Suitable for large-scale power, chemical, and metallurgical units

VI. Typical Applications

Steam turbine, gas turbine shaft vibration / axial displacement

Centrifugal compressor, pump, fan phase angle / rotational speed

Explosion-proof area (ATEX/IECEx) rotating equipment condition monitoring

VII. Selection Quick Reference (Difference from ordinary version)

‑05: With explosion-proof certification, suitable for Zone 0/1/2 hazardous areas

09-51: 0.9in rod + 5.1in housing, commonly used length for medium-deep hole installation