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21747-075-00

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The 21747-075-00 is a component of the Bentley Nevada 7200 series Proximity Transducer Systems, designed for non-contact displacement and vibration measurement on rotating machinery.
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Technical specifications for 21747-075-00

  • Manufacturer:
    Bently Nevada
  • Part Number:
    21747-075-00
  • Product Family:
    7200 Proximity Transducer Systems
  • Linear Measuring Range:
    80 mils (2.0 mm)
  • Scale Factor:
    200 mV/mil (7.87 V/mm) ±4% (system calibrated)
  • Linearity:
    Within 0.8 mils (0.02 mm) of straight line
  • Frequency Response:
    0 Hz (DC) to 10 kHz (600,000 cpm); -5% at 10 kHz
  • Relative Humidity:
    Up to 95% noncondensing
  • Certifications:
    CSA, BASEEFA, FM
  • Weight:
    0.7 kg
  • Estimated shipping dimensions:
    30x28x4cm
  • Tariff Code:
    8537101190
  • Country of origin:
    USA
  • Place of shipment:
    Xiamen, Fujian, China
By purchasing this item, you agree to the Terms & Conditions, ApterPower is not an authorized distributor for listed manufacturers or tradenames and therefore the manufacturer's warranty does not apply. All our products come with ApterPower's 1-year warranty.
Description
The 21747-075-00 proximity transducer system is engineered to deliver precise, non-contact measurements in demanding industrial environments. Utilizing eddy current technology, it accurately senses the gap between the probe tip and a conductive target, translating it into a linear voltage output. 

Constructed for durability, the probe in the 21747-075-00 system is available in 5 mm and 8 mm diameters, with material options like fiberglass and polyphenylene sulfide (PPS) for harsh chemical and wet environments. The system features an improved design with options for integral cable lengths of 5 or 9 meters, enhancing installation flexibility and robustness. 

In terms of performance, the 21747-075-00 offers a calibrated range of 80 mils (2.0 mm) with a scale factor of 200 mV/mil (±4% when system-calibrated). Its broad frequency response from DC to 10 kHz enables it to capture both slow positional changes and high-frequency vibrations. 

Finally, the 21747-075-00 is designed for seamless integration and safety in industrial settings. It is compatible with Bentley Nevada’s 3300 and 9000 monitoring systems and can be used with Proximitors located up to 1,000 feet away without signal loss.
Alternative Names
21747-040-00 21747-045-00 21747-080-00 21747-085-00
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FAQS

The following is a list of questions commonly asked by our customers. Please contact us if you have a question about our process that is not answered below.
What is the typical application of the 21747-075-00 proximity transducer system?
The 21747-075-00 is commonly used for non-contact measurement of shaft radial vibration, axial thrust position, and rotor eccentricity on rotating machinery such as turbines, compressors, and pumps. Its frequency response from DC to 10 kHz allows it to capture both slow positional shifts and dynamic vibrations, making it ideal for condition monitoring and diagnostic applications.
What is the calibrated measuring range and output sensitivity of the 21747-075-00?
The 21747-075-00 has a calibrated linear range of 80 mils (2.0 mm), starting approximately 10 mils from the probe face. It provides a scale factor of 200 mV per mil (7.87 V/mm) with a system-calibrated accuracy of ±4% over the full range.
What environmental conditions can the 21747-075-00 probe withstand?
The probe and extension cable for the 21747-075-00 are rated for operation from -30°F to +350°F (-34°C to +177°C). The 8 mm probes, constructed from PPS plastic, offer excellent corrosion resistance against direct contact with water, lube oil, 10% sulfuric acid, MEK, DMF, and ammonium hydroxide, making the 21747-075-00 suitable for harsh industrial environments.
Is the 21747-075-00 system suitable for hazardous locations, and what is the maximum cable distance to the monitor?
Yes, the 21747-075-00 and related 7200 series transducers are certified by CSA, BASEEFA, and FM for specific hazardous locations (refer to Data Sheet L1035 for details). The Proximitor used with the 21747-075-00 can be located up to 1,000 feet from standard Bentley Nevada monitors without performance degradation, ensuring reliable signal transmission in extended installations.

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