21504-04-12-05-02 Bently Nevada 8mm Proximity Probe

Bently Nevada 21504-04-12-05-02 8mm Proximity Transducer System Overview

Precision Engineered Technical Specifications

• Brand and Model: This unit is a genuine Bently Nevada 21504, configured for specific installation needs.
• Mechanical Configuration: It features an 8 mm diameter tip with 3/8-24 threads. The suffix 04-12-05-02 indicates a 40 mm unthreaded length, 120 mm case, 0.5 m total length, and a miniature male coaxial connector.
• Power Input: The proximitor requires a DC power supply ranging from -17.5V to -26V DC with a maximum current draw of 12 mA.
• Output Scale and Range: It provides a linear output of 200 mV/mil (7.87 V/mm) over a full range of 80 mils (2.0 mm), starting at 10 mils (0.25 mm).
• System Linearity: The system-calibrated linearity is within ±0.02 mm, ensuring high-accuracy readings.
• Frequency Response: It effectively monitors vibrations from 0 to 10 kHz (600,000 cpm), with only a -5% attenuation at the 10 kHz limit.
• Environmental Durability: The proximitor operates from -51°C to +100°C. The probe cable resists temperatures up to +177°C and withstands exposure to air, water, oils, and sulfuric acid.

Frequently Asked Questions (FAQ)

• What is the primary application for the Bently Nevada 21504? Engineers commonly use this 8 mm probe for radial vibration and axial position monitoring on turbines, compressors, and pumps.
• What does the -17.5V to -26V DC power requirement mean for my setup? You need a negative DC power supply. The proximitor electronics are designed to operate within this specific negative voltage range for optimal performance.
• How does temperature affect the 21504 sensor's readings? At a 1.27 mm gap and 65°C, the sensitivity change is minimal at -396, ensuring the system maintains accuracy across temperature variations.
• Is this system resistant to corrosive chemicals? Yes, the 21504 probe and cable resist common industrial chemicals including ammonium, sulfuric acid, MEK, and DMF.
• Do you have the 21504 in stock? Yes, we maintain a ready inventory of this model. It is a new, factory-sealed unit available for immediate shipment.

Documentation: You will receive a detailed product manual. You can also download the PDF guide here: 7200 Proximity Transducer Systems.

For further assistance or inquiries, please contact us at sales@nex-auto.com or +86 153 9242 9628.

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