Bently Nevada 21504-08-32-10-02 8mm Vibration Probe

Product Introduction

The Bently Nevada 21504-08-32-10-02 is a complete 7200 Proximity Transducer System engineered for precise vibration and position measurement. This model provides a non-contact solution for monitoring critical rotating machinery like turbines and compressors. It is a new and original unit, ensuring high reliability and performance straight from the factory. This specific system configuration includes an 80 mm unthreaded length and a 3.2-inch overall case length. Moreover, its 1.0-meter total length with a miniature coaxial connector simplifies installation. The Bently Nevada 21504-08-32-10-02 delivers a linear output proportional to the gap between the probe and the shaft. Consequently, this accurate data is vital for effective predictive maintenance programs. Furthermore, this sensor helps in avoiding unexpected downtime.

Technical Specifications

The Bently Nevada 21504-08-32-10-02 provides accurate and reliable data crucial for diagnostics. This section details its core performance parameters.

Input and Output Characteristics

The system requires a DC power input ranging from -17.5 Vdc to -26 Vdc, consuming a maximum of 12 mA. Its output is calibrated over a standard range of 80 mils (2.0 mm). Specifically, this linear measurement begins at approximately 10 mils (0.25 mm) from the probe face. The scale factor is fixed at 200 mV/mil (7.87 V/mm). When calibrated as a whole system, the accuracy is within ±4%. Additionally, the 21504-08-32-10-02 shows excellent linearity, typically within 0.8 mils (0.02 mm) of its ideal straight-line output.

Dynamic Performance

The 21504-08-32-10-02 is built for dynamic measurements with a frequency response from 0 to 10 kHz (0 to 600,000 cpm). At 10 kHz, the response remains within -5%. Its temperature sensitivity is minimal, with a typical change of -3% in scale factor at +150°F (+65°C). This stable performance ensures the probe remains accurate in varying thermal conditions.

Mechanical and Environmental Limits

The construction of the Bently Nevada 21504-08-32-10-02 allows it to operate reliably in demanding industrial environments.

Physical Dimensions

This model has an 8 mm tip diameter and features standard 3/8-24 threads for secure mounting. It does not include lead armor. The overall case length is 3.2 inches (Option 32). The unthreaded length is 80 mm (Option 08). The total length, including the cable and connector, is 1.0 metre, with a tolerance of +.25 metre and -.10 metre.

Environmental Resilience

Operating temperature limits vary by component. The Proximitor functions between -60°F to +212°F (-51°C to +100°C). Meanwhile, the probe and cable withstand temperatures from -30°F to +350°F (-34°C to +177°C). Furthermore, the probe is corrosion-resistant. Direct contact with air, water, and various chemicals does not affect its operation. The unit also operates in relative humidity up to 95%, non-condensing.

Installation and Setup Guide

Proper installation of the Bently Nevada 21504-08-32-10-02 is essential for optimal performance. Following these guidelines ensures accurate readings and long-term reliability.

Mounting Procedure

First, select an appropriate mounting location on the machine's bearing housing. The standard 3/8-24 threads allow for easy attachment to a compatible mounting fixture or probe holder. Subsequently, ensure the target surface is clean and within the measurement range, which starts at approximately 10 mils from the probe face. A proper initial air gap is critical for correct operation.

Electrical Connection

After mounting, connect the system to a clean DC power supply between -17.5 Vdc and -26 Vdc. Then, connect the output signal to your monitoring system using the miniature male coaxial connector (Option 02). Finally, verify all connections are secure and correctly polarized. Always power up the system according to the manufacturer's recommended sequence.

Packaging and Shipping

The Bently Nevada 21504-08-32-10-02 arrives in its original factory packaging. This packaging is designed to protect the sensitive sensor during transit. The shipment includes the complete Proximitor and probe assembly as configured. It is prepared to ensure safe delivery to your facility. We exclusively ship all orders using premium carriers: Fedex, UPS, and DHL.

Packaging List

• 1 x Bently Nevada 21504 Proximitor

• 1 x 8mm Probe Assembly (as configured)

• 1 x Installation Guide

Frequently Asked Questions (FAQ)

1. What is the intended application for the Bently Nevada 21504-08-32-10-02?
This proximity probe is primarily used to measure shaft vibration and axial position in rotating machinery. It provides a DC signal that is proportional to the gap between the probe tip and the shaft, which is essential for condition monitoring and protection systems.

2. What is the calibrated measurement range for the 21504-08-32-10-02?
The Bently Nevada 21504-08-32-10-02 has a calibrated range of 80 mils (2.0 mm). Its linear output begins at approximately 10 mils (0.25 mm) from the probe face, allowing for a small initial air gap.

3. What are the temperature limits for the 21504 probe and cable?
The probe and its extension cable can operate in temperatures ranging from -30°F to +350°F (-34°C to +177°C). The Proximitor unit itself operates within a wider range of -60°F to +212°F (-51°C to +100°C).

4. Can the 21504 probe withstand exposure to chemicals?
Yes, the 8 mm probe is corrosion-resistant. Its operation is not affected by direct contact with many industrial substances, including air, water, lube oil, and some mild chemicals like 10% sulfuric acid.

5. How is the 21504-08-32-10-02 shipped?
All units are shipped in new and original factory packaging. We use reliable global carriers such as Fedex, UPS, and DHL to ensure prompt and trackable delivery.