Bently Nevada 21505-00-28-05-02 7200 Probe

Bently Nevada 21505-00-28-05-02 Proximity Vibration Probe

The 21505-00-28-05-02 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 stainless steel armored cable and compact 2.8 inch case suit tight installation spaces that still demand rugged cable protection.

Technical Specifications

The 21505-00-28-05-02 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 2.8 inches. Unthreaded length is 0.0 inch. This 21505-00-28-05-02 configuration includes stainless steel lead armor for mechanical protection. The cable spans 0.5 metre (20 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 armored 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 21505-00-28-05-02 Proximity Vibration Probe

• 1x Factory Original Packaging

FAQ

Q: What is the difference between the 21505-00-28-05-02 and other 7200 series probes?
A: The 21505-00-28-05-02 features a 2.8 inch case, a 0.5 metre cable, and stainless steel armor. Other configurations offer different case lengths, cable lengths, or no armor.

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: Yes, the 21505-00-28-05-02 includes stainless steel lead armor. The armor protects the cable in harsh industrial environments.