Bently Nevada 21500-00-24-05-02 Proximity Probe 5mm

Bently Nevada 21500-00-24-05-02 Proximity Probe

Product Introduction

The 21500-00-24-05-02 is a high-performance eddy current proximity probe from Bently Nevada. This device belongs to the renowned 7200 Proximity Transducer Systems family. This non-contacting sensor specializes in measuring shaft vibration and position in rotating machinery. Its robust construction and reliable output make it ideal for critical machinery protection. Typical applications include turbines, compressors, and pumps.

Key Technical Specifications

This proximity probe features a 5 mm diameter tip. Its calibrated range spans 80 mils (2.0 mm), with the linear measurement beginning at approximately 10 mils (0.25 mm) from the probe face. The system delivers a scale factor of 200 mV/mil (7.87 V/mm), offering an accuracy of ±4% when users calibrate it as a complete system. Additionally, the linearity remains within 0.8 mils (0.02 mm) of a straight-line output when used with its matching proximitor.

The frequency response reaches from 0 to 10 kHz (0 to 600,000 cpm), with only a -5% deviation at the maximum frequency. This broad bandwidth ensures accurate capture of both slow roll and high-speed vibration events. The input power requirement ranges from -17.5 Vdc to -26 Vdc, with a maximum current consumption of 12 mA.

Mechanical Configuration

The 21500-00-24-05-02 model comes with specific dimensional options. The unthreaded length option is 00, which represents 0 mm. The overall case length is option 24, equaling 2.4 inches. The total length is option 05, providing 0.5 metre (20 inches) of cable, with a tolerance of +0.13 metre and -0.05 metre. Furthermore, the connector option is 02, which includes a miniature male coaxial connector for secure signal transmission.

The case configuration follows a standard design, and the probe uses 1/4-28 threads for mounting. Importantly, the lead armor does not come with this model, allowing greater flexibility for routing the cable through tight spaces. This part number arrives new and original, and we supply it in factory packaging to guarantee authenticity and performance.

Environmental Limits and Durability

The operating temperature range for the probe and extension cable spans -30°F to +350°F (-34°C to +177°C). Meanwhile, the proximitor can withstand temperatures from -60°F to +212°F (-51°C to +100°C). The system also tolerates relative humidity up to 95%, non-condensing, making it suitable for diverse industrial environments.

For corrosion resistance, this probe model maintains reliable operation even with direct contact to various substances. These include air, water, lube oil, ammonium hydroxide, 10% sulfuric acid, MEK (methyl-ethyl-ketone), and DMF (dimethylformamide). Therefore, it performs consistently in harsh chemical or wet areas commonly found in petrochemical and power generation plants.

The temperature sensitivity typically shows a -3% change in scale factor at +150°F (+65°C) when measured at a 50 mil gap (1.27 mm). Consequently, the measurement remains stable across varying thermal conditions, ensuring data integrity for predictive maintenance programs.

Installation Guidelines

Proper installation plays a crucial role in achieving optimal performance for the 21500-00-24-05-02 probe. First, ensure the mounting surface has a clean and debris-free condition. Next, use the 1/4-28 threads to secure the probe into the mounting fixture, taking care not to over-torque the housing. The recommended gap for initial setup is approximately 10 mils (0.25 mm) from the target surface, which marks the beginning of the linear range.

For the cable routing, avoid sharp bends or physical stress that could damage the coaxial connector or the cable insulation. Additionally, keep the probe cable away from high-voltage power lines to prevent electrical interference. After installation, perform a system calibration using the matching Bently Nevada proximitor to verify the scale factor and linearity. This step ensures that the output voltage correctly represents the actual gap or vibration amplitude.

Packaging List

This shipment includes the following items:

• 1 x Bently Nevada 21500-00-24-05-02 Proximity Probe (with integral cable)

• 1 x Miniature male coaxial connector (pre-attached)

• 1 x Installation instruction sheet

Please note that the proximitor and mounting hardware require separate purchase. The probe arrives in its original factory packaging to ensure protection during transit.

Shipping Information

All orders ship using premier courier services. We dispatch via FedEx, UPS, or DHL, depending on your location and delivery preference. Each shipment carries full insurance and includes a tracking number for your convenience. Please allow 1-2 business days for order processing before dispatch.

Frequently Asked Questions

1. What is the calibrated range of the Bently Nevada 21500-00-24-05-02?
The calibrated range spans 80 mils (2.0 mm). The linear measurement effectively begins at approximately 10 mils (0.25 mm) from the probe face, making it suitable for small gap measurements.

2. Is this probe compatible with older Bently Nevada monitoring systems?
Yes, the 21500-00-24-05-02 works with the 7200 Proximity Transducer Systems. It can also function with compatible 5 mm proximitors, but we recommend verifying system compatibility before installation.

3. What is the total cable length of this model?
The total length option is 05, which equals 0.5 metre (20 inches). The tolerance allows for +0.13 metre or -0.05 metre, providing some flexibility for installation adjustments.

4. Can this probe handle high-temperature environments?
Absolutely. The probe and extension cable operate reliably from -30°F to +350°F (-34°C to +177°C). This wide range covers most industrial machinery applications, including steam turbines and hot gas compressors.

5. Does the probe require special handling during installation?
Handle the probe with care to avoid damaging the tip or the coaxial connector. Avoid twisting the cable excessively and keep it away from sharp edges. Following the included installation guide will ensure long service life and measurement accuracy.