21504-00-28-05-02 Bently Nevada 8mm Flush Proximity Probe

Bently Nevada 21504-00-28-05-02 7200 Series Proximity Transducer Probe

Technical Specifications and Performance Data

• Brand & Series: Genuine Bently Nevada component from the 7200 Series product line.
• Model Number: 21504-00-28-05-02 (Base part number: 21504).
• Measurement Range: Linear operating range of 2.0 mm (80 mils) from the target surface.
• Starting Gap: Calibrated to begin measurement at 0.25 mm from the probe tip face.
• Scale Factor: Delivers 200 mV/mil (7.87 V/mm) output with a maximum error of ±4%.
• System Linearity: Exceptional linearity of ±0.02 mm when calibrated; ±0.06 mm with full probe interchangeability.
• Frequency Response: Capable of monitoring static displacement (0 Hz) up to 10 kHz (600,000 cpm) with -5% at 10 kHz.
• Power Requirements: Operates on negative DC voltage between -17.5 V and -26 V, drawing a maximum current of 12 mA.
• Thermal Stability: Scale factor drift of -396 μm/m at +65°C (measured at 1.27 mm gap).
• Temperature Tolerance: Proximitor operates from -51°C to +100°C; probe and cable withstand -34°C to +177°C.
• Environmental Resistance: Rated for humidity up to 95% and resists water, oil, 10% sulfuric acid, ammonium hydroxide, MEK, and DMF.

Suffix Configuration and Mechanical Details

• 00 = Tip Style: 0 mm unthreaded tip length (flush mount) for standard installations.
• 28 = Case Length: 2.8-inch overall case length for compact mounting requirements.
• 05 = Cable Length: 0.5 meter (20 inches) integrated coaxial cable for shorter connection runs.
• 02 = Connector: Miniature male coaxial connector (mini coax) for reliable signal transmission.
• Tip Design: Features an 8 mm diameter tip with standard 3/8-24 mounting thread and no armor.
• Weight: Approximately 0.59 kg (1.3 lbs) total assembly weight.

Frequently Asked Questions

• What does the suffix "00" mean on the 21504-00-28-05-02?
  The "00" indicates a flush tip design with 0 mm unthreaded extension. This configuration works best when the probe must mount close to the target without protruding through the housing.
• What is the difference between ±0.02 mm and ±0.06 mm linearity specifications?
  The ±0.02 mm applies when you calibrate the system as a matched set. The ±0.06 mm applies when using any 7200 Series probe with any proximitor, offering full interchangeability without recalibration.
• Can I use this 0.5 meter cable probe with an existing extension cable?
  Yes, the mini coax connector (suffix 02) allows you to connect standard Bently Nevada extension cables. The total cable length affects system calibration, so consult the 7200 Series manual for proper configuration.
• What materials is this probe compatible with?
  Bently Nevada calibrates these probes for AISI 4140 steel. Using different metals may require recalibration for accurate displacement readings.
• Do you have the 21504-00-28-05-02 in stock, and how do you ship?
  Yes, we maintain this model in stock as a new, factory-sealed unit. We process orders within 5 days and ship globally via FedEx, UPS, or DHL with tracking.
• What is your return policy on this item?
  We offer a 30-day return window for items in their original, unopened factory-sealed condition.
• Where can I download the full manual for the 7200 Series system?
  You can access the complete documentation using the PDF download link provided directly below.

Download the complete specifications: 7200 Proximity Transducer Systems PDF

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