21500-00-12-10-02 Bently Nevada Proximity Probe 1m

Bently Nevada 21500-00-12-10-02 7200 Proximity Probe

Product Introduction

The Bently Nevada 21500-00-12-10-02 is a high-performance eddy current proximity probe. It forms the front-end sensing element of the 7200 Proximity Transducer System. Specifically, this probe measures vibration and position of rotating shafts without physical contact. Furthermore, its 5 mm diameter tip provides excellent linearity and sensitivity for most turbomachinery applications. The probe comes with a 1.0-meter integral lead, terminated with a miniature male coaxial connector for easy system integration.

Technical Specifications

The Bently Nevada 21500-00-12-10-02 probe operates on the eddy current principle. When powered, it generates a high-frequency magnetic field from the probe tip. As the target shaft moves closer or farther, the impedance changes proportionally.

The calibrated range for this system is 80 mils (2.0 mm), beginning at approximately 10 mils (0.25 mm) from the probe face. The scale factor is 200 mV/mil (7.87 V/mm) with a ±4% accuracy when calibrated as a system. Additionally, the frequency response is flat from 0 to 10 kHz (0 to 600,000 cpm), with a deviation of less than -5% at the upper limit.

This model features an "Unthreaded Length Option 00" (0 mm), an "Overall Case Length Option 12" (1.2 inches), and a "Total Length Option 10" (1.0 metre). The connector option "02" provides a miniature male coaxial connector for secure attachment to the extension cable or Proximitor.

Physical and Mechanical Features

The 21500-00-12-10-02 probe has a standard case configuration. It uses 1/4-28 threads for easy installation into standard mounting holes. The tip construction is the standard 5 mm diameter type. The lead does not include armor, making it suitable for applications where the lead is protected within the machine casing.

The probe operates reliably in temperatures from -34°C to +177°C. Furthermore, the system weight is 1.3 lbs (0.59 kg). The corrosion-resistant design ensures operation remains unaffected by contact with air, water, lube oil, and several chemicals including 10% sulfuric acid or MEK.

Installation Guidelines

Installing the Bently Nevada 21500-00-12-10-02 requires careful attention to detail. First, ensure the mounting hole is clean and the threads are in good condition. Second, screw the probe into the mounting hole until it reaches the desired gap setting.

For optimal performance, use a gap voltage meter or a Proximitor to set the initial air gap. Typically, the recommended mounting torque for the 1/4-28 thread is 5 to 8 inch-pounds. However, do not overtighten, as this may damage the probe tip or threads. Next, route the integral lead carefully to avoid sharp bends or excessive strain. Finally, connect the miniature male coaxial connector to the mating extension cable or directly to the Proximitor.

Packaging List

• Bently Nevada 21500-00-12-10-02 Proximity Probe (1 unit)

Shipping Information

This item ships from our facility via FedEx, UPS, or DHL. We will dispatch it within 24 hours of receiving your order.

Frequently Asked Questions (FAQ)

1. What is the tip diameter of the Bently Nevada 21500-00-12-10-02 probe?
This probe features a 5 mm tip diameter. It is specifically designed for the 7200 Proximity Transducer System and provides excellent linearity for vibration monitoring applications.

2. What is the total lead length of this 21500-00-12-10-02 model?
The total length option "10" specifies a lead length of 1.0 metre (approximately 39 inches). The tolerance is +0.25 metre and -0.10 metre.

3. What type of connector does the 21500-00-12-10-02 use?
The connector option "02" provides a miniature male coaxial connector. This connector mates directly with Bently Nevada extension cables or the Proximitor input.

4. Can this probe be used for thrust position measurement?
Yes, the 21500-00-12-10-02 probe is suitable for both radial vibration and thrust position measurements. Its calibrated range of 80 mils (2.0 mm) covers most axial position monitoring requirements.

5. What is the thread size on this probe?
The 21500-00-12-10-02 probe uses standard 1/4-28 UNF threads. This size fits most standard mounting holes in bearing housings and machine casings.