ICP® Speed Sensors

Rotational speed measurements offer a common point of reference while performing noise and vibration analysis as a function of RPM. While a variety of methods and transducers can be used to assess dynamic behaviors of rotating machinery, laser tachometers have become a practical, mainstream option for use with commonly available ICP® (IEPE) input channels, offering an easy-to-use alternative to traditional optical pickups. ICP® tachometer signals allow precise rotational speed and phase information measurements needed for order tracking, balancing, NVH, and other applications.

The LaserTach™ Model LT2 ICP® tachometer from The Modal Shop senses the speed of rotating equipment and outputs an analog voltage pulse train for referencing vibration signals to shaft speed. The sensor allows for measurements up to 100 000 RPM from distances as far as 20 in (51 cm). A status LED provides positive, visual indication of proper signal pickup. The standard BNC jack connects the sensor to all constant current, ICP® conditioned data acquisition systems and signal conditioners. Unlike magnetic tachometer pickups, the LaserTach LT2 does not require the rotating equipment to be a ferrous material - only a retroreflective target needs to be attached to the shaft.