74712-06-05-02-01 Bently Nevada Seismoprobe Velocity Transducers

The Bently Nevada 74712-06-05-02-01 Seismoprobe Velocity Transducer is a high-performance two-wire vibration sensor designed for accurate measurement of absolute vibration in industrial machinery. It is part of the trusted Seismoprobe Velocity Transducer family, engineered for monitoring bearing housings, casings, and structural vibration.

This model is a high-temperature version of the 9200 series, making it suitable for demanding environments where elevated operating temperatures are present.

Using proven moving-coil technology, the 74712 transducer generates a voltage output directly proportional to vibration velocity, delivering reliable and stable measurements without requiring external power.

• Sensitivity: 20 mV/mm/s (500 mV/in/s), ±5%
• Calibration Load: 10 kΩ terminal "A" to "B"
• Sensitivity Temperature Coefficient: 0.2%/°C
• Frequency Response: from minimum operating frequency up to 1 kHz (60,000 cpm)
• Typical response: +0 / -3 dB
• Dynamic Operating Range: 2.54 mm (0.100 in) peak-to-peak max displacement
• Velocity Range: 25 mm/s (1 in/s) at 22 °C, 100 Hz, 10 kΩ load
• Coil Resistance: 1.25 kΩ ±5%

• Operating Temperature: -29 °C to +204°C (-20°F to +400°F)
• Storage Temperature: -29 °C to +204°C
• Relative Humidity:
  • Up to 95% non-condensing
  • Up to 100% non-submerged (with integral cable option)
• Maximum Altitude: 2000 m (6,561 ft) above sea level

• Steam and gas turbines
• Compressors and pumps
• Industrial fans and blowers
• Electric motors
• Bearing housing vibration monitoring
• Structural vibration analysis
• Condition monitoring systems
• Predictive maintenance programs

The 74712-06-05-02-01 Seismoprobe Velocity Transducer is engineered to measure absolute vibration velocity of bearing housings, casings, and structural components. It provides a direct velocity-proportional voltage output for precise condition monitoring and machinery protection.

The 74712-06-05-02-01 Seismoprobe Velocity Transducer operates using a moving-coil electrodynamic mechanism, where relative motion between a coil and magnetic field generates a voltage proportional to vibration velocity, eliminating the need for integrated electronic processing.

The 74712-06-05-02-01 Seismoprobe Velocity Transducer is rated for -29 °C to +204°C (-20°F to +400°F), enabling reliable operation in high-thermal-stress environments such as steam turbines and industrial compressors without signal degradation.

The 74712-06-05-02-01 Seismoprobe Velocity Transducer delivers a sensitivity of 20 mV/mm/s (500 mV/in/s) ±5%, when correctly terminated with a 10 kΩ calibration load, ensuring high-fidelity vibration signal reproduction.

The 74712-06-05-02-01 Seismoprobe Velocity Transducer supports a frequency response up to 1 kHz (60,000 cpm) with a typical +0 / -3 dB tolerance, enabling accurate detection of both low-frequency and mid-frequency mechanical vibrations.