May 28, 2026

Bently Nevada 330101-00-28-10-11-00 Product Description

The Bently Nevada 330101-00-28-10-11-00 is an 8 mm eddy-current proximity probe from the 3300 XL series, manufactured by Bently Nevada (a Baker Hughes company). Designed for non-contact measurement on rotating machinery, it complies with API 670 standards and is a core component of the 3300 XL transducer system. It is widely used in power generation, oil and gas, chemical, and metallurgical industries to monitor shaft radial vibration, axial displacement, eccentricity, and Keyphasor/speed signals for critical equipment, providing reliable data for online condition monitoring, fault early warning, and safety interlock protection.

Description

Bently Nevada 330101-00-28-10-11-00 Product Description

1. Product Overview

2. Model Number Decoding (330101-00-28-10-11-00)

330101: Base model, 3300 XL 8 mm standard proximity probe, 3/8‑24 UNF thread, unarmored.
00: Standard unthreaded mounting length.
28: Probe housing length = 2.8 inches (≈71 mm).
10: Integral cable length = 1.0 m, unarmored.
11: Connector type, standard coaxial connector.
00: Certification level, no explosion‑proof certification, for ordinary non‑hazardous industrial areas.

3. Working Principle

The probe operates on the eddy‑current effect. A high‑frequency alternating current flows through the internal coil, generating a stable alternating magnetic field. When the probe approaches a metallic shaft, eddy currents are induced on the conductor surface. The opposing magnetic field from the eddy currents changes the coil’s inductance and impedance. The matched Proximitor sensor detects this change and converts it linearly into a standard negative voltage signal. The non‑contact measurement is unaffected by oil, water vapor, dust, or debris, ensuring long‑term stable operation.

4. Key Technical Specifications

Measurement System: 3300 XL 8 mm eddy‑current transducer system (probe + extension cable + Proximitor).
Linear Range: 2.0 mm (80 mils); effective range 0.25–2.3 mm (10–90 mils).
Sensitivity: 7.87 V/mm (200 mV/mil), tolerance ±5%.
Linearity: ≤±0.025 mm (±1 mil).
Output Voltage: −1 VDC to −17 VDC (linear range).
Recommended Gap: 1.27 mm (50 mils), output ≈−9 VDC.
Frequency Response: 0–10 kHz.
Probe Resistance (25°C): 7.59 Ω ±0.50 Ω (1 m cable).
Operating Temperature: −51°C to +177°C (−60°F to +350°F).
Housing Material: AISI 303/304 stainless steel, corrosion‑resistant.
Tip Material: Polyphenylene sulfide (PPS), high‑temperature resistant, insulating.
Cable Insulation: FEP (fluorinated ethylene propylene), oil‑resistant, aging‑resistant.
Protection Class: IP65 (dust‑tight, water‑jet protected).
Certifications: CE, UL; no explosion‑proof approvals.
Interchangeability: Probe, extension cable, and Proximitor are fully interchangeable without individual matching or calibration.

5. Mechanical Construction & Core Features

5.1 Mechanical Construction

Thread: 3/8‑24 UNF external thread, compatible with standard industrial mounting bases; lock nut for secure fastening.
Housing: Compact 2.8‑inch length, suitable for tight installation spaces.
Cable: 1.0 m unarmored integral cable, flexible routing, minimum bend radius ≥5× cable diameter.
Connector: Standard coaxial connector, vibration‑resistant, reliable connection, easy maintenance.

5.2 Core Advantages

High Precision & Stability: Nanometer resolution, low temperature drift, stable long‑term operation.
Strong EMI/RFI Immunity: Built‑in electromagnetic shielding, meets CE requirements, suitable for high‑EMI environments (inverters, large motors).
Easy Maintenance: Interchangeable components reduce spare parts inventory and on‑site maintenance costs.
Non‑contact Measurement: No wear on the measured shaft, long service life.
Rugged Environmental Performance: IP65 rating, withstands dust, oil, and moisture in harsh industrial sites.

6. System Composition & Compatibility

A complete measurement system requires:

This probe (330101-00-28-10-11-00);
3300 XL extension cable (total length matched to Proximitor);
3300 XL Proximitor sensor.

Fully compatible with Bently Nevada 3300 and 3500 series monitoring frames. Output signals can be directly integrated into DCS/PLC systems for real‑time monitoring, alarm, and interlock protection, supporting both static (position) and dynamic (vibration) measurements.

7. Typical Applications

Power Generation: Steam turbines, gas turbines, generators, feedwater pumps, induced/draft fans.
Oil & Gas: Centrifugal compressors, process pumps, LNG plant rotating equipment.
Chemical & Metallurgy: Large motors, fans, gearboxes, high‑speed rotating machinery.
Monitored Parameters: Shaft radial vibration, axial displacement, eccentricity, Keyphasor/speed signals.

8. Installation & Maintenance Guidelines

8.1 Installation

Gap Setting: Adjust static gap to 1.27 mm (−9 VDC); avoid contact with the shaft to prevent damage.
Fastening: Tighten lock nut after threading to prevent vibration‑induced loosening.
Cable Routing: Keep away from high‑current cables and strong EMI sources; minimum bend radius ≥5× cable diameter.
System Length: Probe cable + extension cable length must match Proximitor calibration length.

8.2 Maintenance

Calibration: Annual calibration recommended to ensure accuracy.
Troubleshooting: For signal drift/abnormality, check connector integrity, cable damage, and ambient temperature.
Cleaning: Regularly clean probe tip oil/dust to avoid measurement interference.

9. Safety & Usage Notes

Temperature Limits: Do not exceed rated temperature range; avoid mechanical impact or excessive bending.
Non‑explosion‑proof: Do not use in hazardous explosive areas.
Genuine Components: Use only Bently Nevada original parts; non‑genuine components may cause inaccuracy or system failure.
Corrosion Protection: Avoid prolonged exposure to strong corrosive liquids; increase inspection frequency in harsh environments.

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