21504-00-28-10-02 | Bently Nevada 8 mm Proximity Probe

Bently Nevada 21504-00-28-10-02 Proximity Vibration Probe – High-Precision Vibration Monitoring

Technical Data

• Brand: Bently Nevada
• Model: Probe Proximity Vibration (7200 Series)
• Part Number: 21504-00-28-10-02

Part Number Breakdown

• 21504: Base model (7200 Proximity Transducer System)
• -00: Unthreaded length (0 mm)
• -28: Overall case length (2.8 inches)
• -10: Total length (1.0m / 39 inches, ±0.25m/-0.10m tolerance)
• -02: Miniature male coaxial connector

Core Specifications

• Probe Diameter: 8 mm (standard 3/8-24 threads).
• Calibrated Range: 80 mils (2.0mm), starting ~10 mils (0.25mm) from probe face.
• Output Signal: 200 mV/mil (7.87 V/mm), ±4% (system-calibrated).
• Linearity: ±0.8 mils (0.02mm) (system-calibrated); ±2.3 mils (0.06mm) with interchangeability.
• Frequency Response: 0-10 kHz (0-600,000 cpm), -5% at 10 kHz.
• Power Input: -17.5Vdc to -26Vdc (max 12mA).

Environmental Limits

• Operating Temp: Proximitor (-60°F to +212°F); Probe/Cable (-30°F to +350°F).
• Humidity: Up to 95% non-condensing.
• Corrosion Resistance: Withstands air, water, lube oil, 10% sulfuric acid, MEK, DMF (8mm probes only).

Installation Guide

Install using 3/8-24 threads. Align probe with target surface. Use 1.0m (39 inches) cable (tolerance ±0.25m/-0.10m). Connect via miniature male coaxial connector.

Applications

Used in turbines, pumps, and compressors across power plants, refineries, and manufacturing. Ideal for monitoring critical rotating equipment.

Maintenance & Lifespan

Clean probe tip monthly. Check cable for wear. Re-calibrate annually. Lasts 5+ years (with 12-month warranty).

Safety Warnings

• Do not exceed -17.5Vdc to -26Vdc input.
• Avoid condensing environments (>95% humidity).
• Disconnect power before installation/removal.