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74712-03-10-02-00

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The 74712-03-10-02-00 is a Bently Nevada Seismoprobe high‑temperature two‑wire velocity transducer with 4.5 Hz (270 cpm) minimum frequency, M10×1 stud mounting, and top‑mount connector.
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Technical specifications for 74712-03-10-02-00

  • Manufacturer:
    Bently Nevada
  • Part Number:
    74712-03-10-02-00
  • Product Family:
    9200 and 74712 Seismoprobe Velocity Transducers
  • Product Type:
    Transducer
  • Minimum Operating Frequency:
    4.5 Hz (270 cpm)
  • Mounting Angle:
    90° ±2.5°
  • Mounting Base:
    Circular, M10×1 stud
  • Agency Approvals:
    None
  • Power Required:
    None (passive device)
  • Weight:
    0.5 kg
  • Estimated shipping dimensions:
    8.9x2.5x24cm
  • Tariff Code:
    8543902100
  • 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.

More Information

Overview Manuals Specifications Application Protection Functions Installation and Upgrades

Features:

  • Passive two‑wire design; outputs voltage directly proportional to vibration velocity; requires no external power; less sensitive to impact excitation.
  • Measures bearing housing, casing, or structural vibration relative to free space; minimum operating frequency 4.5 Hz (270 cpm).
  • M10×1 stud mounting (circular base); top‑mount connector; 90° ±2.5° mounting angle; no agency approvals.
The 74712-03-10-02-00 uses moving‑coil technology, a mature and reliable method for vibration measurement. Inside the transducer, a coil moves within a magnetic field relative to the housing. This motion generates a voltage that is directly proportional to the vibration velocity. Because the transducer has no built‑in electronics, it requires no external power supply – a significant advantage for portable measurement applications and for installations where running power cables is difficult. The output signal is a low‑impedance voltage that can be sent over long cables without significant degradation.

The 74712-03-10-02-00 is specifically designed to measure absolute vibration – that is, the motion of a bearing housing, machine casing, or structural element relative to free space (inertial reference). This is distinct from relative vibration measurements (e.g., shaft vibration measured by proximity probes). Absolute velocity measurement is essential for assessing the overall dynamic behavior of machine casings, foundations, and support structures.

The 74712-03-10-02-00 is built for demanding industrial environments. Its mechanical construction is rated for high‑temperature operation (specific temperature range not provided in this document, but the "high‑temperature" designation indicates suitability for steam turbine casings, gas turbine exhausts, and other hot spots). The mounting base is circular with an M10×1 stud – a metric thread common in European and Asian machinery. The connector is top‑mount, allowing cable routing directly upward from the transducer.

The 74712-03-10-02-00 Bently Nevada Transducer may still be available for purchase and support from Apter Power beyond End-Of-Life (EOL)by the manufacturer (OEM).

Bently Nevada 74712-03-10-02-00 Transducer Manuals, Datasheets,Drivers,Link Important Notice:Other accessories,manuals,cables,calibration data,software,etc.are not included with this equipment unless listed in the above stock item description.All prices are shown in USD.
Bently Nevada 74712-03-10-02-00 Transducer Specs

General

  • Manufacturer GE /Bently Nevada
  • Model 74712-03-10-02-00
  • Condition New Original ready stock
  • Product Family 9200-01-01-10-00,9200-01-05-10-00
Important Notice:Other accessories,manuals,cables,calibration data,software,etc.are not included with this equipment unless listed in the above stock item description.All prices are shown in USD.
  • High-Temperature Environments: Particularly suitable for areas with extremely high operating temperatures (up to 204°C), such as steam turbines, thermal network pumps, or high-temperature fans.
  • Industrial Applications: Widely used in power plants, petrochemical plants, and various heavy industrial facilities requiring monitoring of equipment imbalance, misalignment, or mechanical looseness.
  • Advantages: Due to its moving-coil technology, it is less susceptible to shock-induced interference than solid-state accelerometers, and because it does not require external power, it is also commonly used for portable measurements.
  • Vibration Monitoring: Outputs a DC voltage signal proportional to the vibration velocity (standard sensitivity 20 mV/mm/s) to determine the machine's health status.
  • Early Failure Warning: Monitors changes in absolute vibration to help diagnose common faults such as rotor imbalance and misalignment.
  • Trip Protection: The signal can be connected to a Bently Nevada 3500 or 3300 monitoring system to trigger an alarm or automatic shutdown interlock when vibration exceeds safety limits..
  • Mounting Angle (03): Represents the sensor's installation direction and minimum operating frequency limit (usually vertical, horizontal, or at a specific angle; installation must strictly adhere to the calibrated angle to ensure accuracy).
  • Upgrade Recommendation: When upgrading from an existing system, note that the 74712 is a moving-coil design. For most modern installation environments, Bently Nevada recommends considering an upgrade to the Velomitor series, which utilizes solid-state technology, offering a wider frequency response and better long-term stability.
Description
The 74712-03-10-02-00 is a two‑wire moving‑coil velocity transducer from Bently Nevada’s Seismoprobe family. It measures absolute bearing housing, casing, or structural vibration. The transducer requires no external power, making it convenient for portable measurements.

When using the 74712-03-10-02-00, engineers can monitor vibration on rotating machinery such as turbines, compressors, and pumps. The minimum operating frequency is 4.5 Hz (270 cpm), with a mounting angle of 90° ±2.5°. 

The 74712-03-10-02-00 uses moving‑coil technology, providing a voltage output directly proportional to vibration velocity. Moving‑coil transducers are less sensitive to impact or impulsive excitation than solid‑state velocity transducers. 

For absolute vibration measurement, the 74712-03-10-02-00 is part of a two‑wire system including the transducer and appropriate cable. It is specifically designed to measure absolute vibration relative to free space. 
Alternative Names
9200-01-01-10-00 9200-01-05-10-00 74712-03-10-01-00
Technical notes
The 74712-03-10-02-00 uses moving‑coil technology, which generates a voltage output directly proportional to vibration velocity without requiring external power. This makes it inherently simpler and more robust than solid‑state velocity transducers that rely on integrated electronics.
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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 does the 74712-03-10-02-00 measure?
The 74712-03-10-02-00 measures absolute vibration of bearing housings, casings, or structures relative to free space. It uses moving‑coil technology to output voltage directly proportional to vibration velocity, with a minimum frequency of 4.5 Hz (270 cpm).
Is the 74712-03-10-02-00 sensitive to impacts?
No. The 74712-03-10-02-00 uses moving‑coil technology, which is less sensitive to impact or impulsive excitation than solid‑state transducers. This makes it a good choice for applications with mechanical shocks, such as reciprocating machinery.
Does the 74712-03-10-02-00 require external power?
No. The 74712-03-10-02-00 is a passive two‑wire moving‑coil transducer that requires no external power. It generates its own voltage output proportional to vibration velocity, making it convenient for portable measurement applications and simplifying field wiring.
What are the mounting and connector details of the 74712-03-10-02-00?
The 74712-03-10-02-00 has a circular mounting base with an M10×1 stud. The connector is top‑mount. Minimum operating frequency is 4.5 Hz (270 cpm) with a mounting angle of 90° ±2.5°. It has no agency approvals.

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