Product Overview

The 21504-00-08-10-02 is a precision-engineered 8mm proximity sensor from Bently Nevada, specifically designed for non-contacting displacement measurements in high-speed rotating machinery. Operating on the eddy current principle, this probe tracks both static shaft position and dynamic vibration levels with high linearity. It is a legacy-standard component often integrated into 7200 and 3300 series transducer systems. By providing a voltage output proportional to the gap between the probe tip and the target shaft, it allows for the early detection of mechanical anomalies, ensuring adherence to API 670 safety and performance standards.

Critical Design Parameters and Physical Specifications

This probe is built with advanced materials to maintain signal accuracy in volatile industrial climates.

• Sensor Tip Diameter: 8 mm

• Measurement Range: 2.0 mm (80 mils) linear range

• Insulation Material: Polyphenylene sulfide (PPS) high-performance thermoplastic

• Cable Architecture: 0.5-meter integral coaxial cable with miniature male connector

• Connection Technology: CableLoc design for superior pull-strength and mechanical bond

• Net Weight: 0.06 kg

• Unit Dimensions: 1.8 cm x 1.6 cm x 123 cm (Total reach/sleeve reference)

• Mounting Configuration: Standard mount (unarmored lead)

• Operating Temperature: Rated for high-heat environments typical of turbine casings

• HS Code: 8537101190

Industrial Deployment and Equipment Synergy

The 21504-00-08-10-02 probe is a foundational sensor for Turbine Supervisory Instrumentation (TSI) and is widely deployed across the following equipment types:

• Steam and Gas Turbines: Monitoring radial vibration and axial thrust to prevent internal component contact.

• Centrifugal Compressors: Measuring shaft stability and oil film thickness in high-pressure gas applications.

• Power Generation: Providing vibration feedback for large-scale electric motors and generators.

• Pumping Stations: Continuous monitoring of industrial pumps to identify bearing wear or rotor unbalance.

• Predictive Maintenance: Functioning as a primary data source for 3500 series machinery protection racks.

FAQ

Q: Is the 21504-00-08-10-02 compatible with the newer 3300 XL Proximitor?

While primarily designed for the 7200 series, this probe can often be integrated into 3300 systems; however, you must ensure the Proximitor is calibrated specifically for the 7200-style probe scale factor to maintain accuracy.

Q: What is the benefit of the PPS material used in the probe tip?

Polyphenylene sulfide (PPS) provides exceptional resistance to chemical corrosion, moisture ingress, and thermal degradation, which is vital when the probe is submerged in hot lubricating oil.

Q: Does this model include protective armor for the integral cable?

This specific configuration (-00-08-10-02) denotes a standard mount without stainless steel armor. If your application involves high abrasion or physical risk to the cable, an armored version may be required.

Q: How does CableLoc technology improve the sensor's lifespan?

CableLoc technology significantly increases the tensile strength of the connection between the probe tip and the lead-out cable, preventing the wire from pulling out during installation or due to machine vibration.

Q: What is the significance of the 0.5-meter cable length?

The 0.5-meter integral lead is intended to connect to a longer extension cable, allowing the connection point to be located safely outside of the immediate high-heat or high-oil zone of the machine housing.