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rotational speed sensor / laser / waterproof / robust
2981 Bruel and Kjaer



  • Type of movement:


  • Technology:


  • Other characteristics:

    waterproof, robust

  • Temperature range:

    Min.: -60 °C (-76 °F)

    Max.: 130 °C (266 °F)


The 2981 - CCLD laser tacho probe are designed and develop to be use for contact-free speed measurements ideally in rotating machine parts.

Made from robust and IP 64 rated material, the 2981 can withstand the harshest of application. It has been optimized to operate with CCLD or ICP® inputs from 3 to 20 mA constant current, no need for separate power supply. It can be calibrated to verify tachometer trigger level. It has an operating range of at least 70 cm and can still operate even under low light conditions.

Easy to operate and assemble with different mounting options.

Other Bruel and Kjaer products

Vibration transducers