Bently Nevada 21504-00-76-05-02 7200 Probe

Bently Nevada 21504-00-76-05-02 Proximity Vibration Probe

The 21504-00-76-05-02 belongs to the Bently Nevada 7200 Proximity Transducer System family. This 8 mm probe performs non-contacting vibration and position measurements on critical rotating machinery. Its 0.5 metre cable and compact 7.6 inch case suit installation in confined spaces where longer probes cannot fit.

Technical Specifications

The 21504-00-76-05-02 delivers a calibrated range of 80 mils (2.0 mm). Measurement begins at approximately 10 mils (0.25 mm) from the probe face. Output sensitivity is 200 mV/mil (7.87 V/mm). System accuracy reaches ±4% when calibrated together. Interchangeability errors remain within ±9.5%. Linearity stays within 0.8 mils of a straight line for system-calibrated units.

Power input requires -17.5 Vdc to -26 Vdc. Maximum consumption is 12 mA. The frequency response covers 0 to 10 kHz with a -5% deviation at 10 kHz. Temperature sensitivity typically shows a -3% scale factor change at +65°C with a 1.27 mm gap.

Key parameters:

• Calibrated Range: 80 mils (2.0 mm)

• Scale Factor: 200 mV/mil (7.87 V/mm)

• Frequency Response: 0 to 10 kHz

• Power Input: -17.5 to -26 Vdc

Mechanical and Environmental Parameters

The probe tip diameter measures 8 mm. Mounting threads follow the 3/8-24 UNF standard. The overall case length is 7.6 inches (193 mm). Unthreaded length is 0 mm. This 21504-00-76-05-02 configuration does not include lead armor. The cable spans 0.5 metre (20 inches) with a tolerance of +5 inches and -2 inches. Connector option 02 provides a miniature male coaxial termination.

Operating temperature ranges differ by component. The probe and extension cable tolerate -34°C to +177°C. The Proximitor unit handles -51°C to +100°C. Humidity tolerance reaches 95% non-condensing. The 8 mm probe resists direct contact with air, water, lube oil, ammonium hydroxide, sulfuric acid (10%), MEK, and DMF. System weight totals 1.3 lbs (0.59 kg).

Installation Guide

Proper installation ensures accurate measurement. First, verify the tapped hole is clean and free of debris. Thread the probe by hand to avoid cross-threading. Use a nonmetallic feeler gauge to set the gap; this prevents scratching the probe tip or target surface.

The target surface must remain motionless during gapping. Set the initial gap to approximately 10 mils (0.25 mm) from the probe face. This ensures the measurement stays within the linear range. Ensure the cable can rotate freely during threading to avoid twisting the lead. Route the cable with a minimum bend radius. Ground the cable shield at one end only to prevent ground loops.

Packaging List

• 1x Bently Nevada 21504-00-76-05-02 Proximity Vibration Probe

• 1x Factory Original Packaging

FAQ

Q: What is the difference between the 21504-00-76-05-02 and other 7200 series probes?
A: The 21504-00-76-05-02 features a 7.6 inch case and a short 0.5 metre cable. Other configurations offer different case lengths, cable lengths, or armor options.

Q: Does this probe come with a Proximitor?
A: No, this listing includes the probe only. The Proximitor must be ordered separately for a complete transducer system.

Q: What is the recommended gap setting for installation?
A: Set the initial gap to approximately 10 mils (0.25 mm) from the probe tip to the target surface.

Q: How do I ship this product?
A: We ship worldwide via Fedex, UPS, and DHL.

Q: Is the cable armored on this model?
A: No, the 21504-00-76-05-02 has no lead armor. The "00" in the part number indicates 0 mm unthreaded length and standard non-armored construction.