Terahertz LT-880 - Fiber Optic Laser Tachometer - Includes 5 Meter Cable with Reflective Sensor Head

The LT-880 Laser Tachometer is a hand-held, battery operated device that senses the passage of reflective/non-reflective markings on a rotating or linearly translated piece of machinery in order to determine the target’s rotational rate or its linear velocity.

The LT-880 Laser Tachometer is a hand-held, battery operated device that senses the passage of reflective/non-reflective markings on a rotating or linearly translated piece of machinery in order to determine the target’s rotational rate or its linear velocity. The sensing head is remote from the electronics package and is fiber coupled. This permits measurement of objects in hostile environments or in hard-to-get-to locations. The sensed change in reflectivity from black to white generates a transition at its output. This TTL/CMOS compatible signal may be utilized by a spectrum analyzer, computer or electronic counter in order to provide information concerning vibration, angular or linear velocity of the machinery under test. The high speed of the unit, 40, 000 PPS, coupled with its small spot size can provide high resolution measurements unattainable with conventional incandescent source tachometers.

The optical head is equipped with a five meter length of duplex fiber cable. Other lengths of fiber can be provided up to several hundred meters in length. Right angle attachments are also available.

The use of specially manufactured reflective optical encoders in unnecessary. Encoders may be made with any CAD program and a laser printer on ordinary white copier paper.

A six digit LCD display indicates the rate of passage of the white/dark areas of the encoder and registers the results in units of revolutions per minute, (RPM), revolutions per second, (RPS), or pulses per second (PPS). The reading is updated twice per second. The user may input the number of pulses per revolution of the encoder for use in the subsequent calculations. They may range from 1 pulse per revolution to 255 pulses per revolution.