Laser Tachometer
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 the 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, and the 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.
Use the right-angled adapter if it is not possible to aim the standard optical head at the target. The transmissive head is a beam-breaking device that allows a <1/4 inch slotted target to pass through the head’s transmitter and receiver. 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 generated by the encoder for use in the subsequent calculations. They may range from 1 pulse per revolution to 255 pulses per revolution.
The LT-880 Fiber Optic Laser Tachometer is a non-contact instrument designed to measure rates of rotation by sensing the presence or absence of a reflective surface in its optical beam.
These are typically provided by affixing an easily made black-and-white encoder to the surface of the rotating component. A TTL signal is asserted whenever a reflective surface is sensed. The output signal may be read directly from the display or used in conjunction with a spectrum analyzer to sense linear translation, RPM, and angular vibrations. A five-meter fiber optic cable enables the optical sensor to be placed in hazardous environments and/or inaccessible spaces where a conventional unit cannot be used. The LT-880 adds the additional flexibility of a multi-functional readout.
Supplied with 5-meter Fiber Optic Cable with Reflective Optical Head and 9 VDC Power Supply with International Mains.
Encoders may be made easier with a laser printer and any drawing or CAD program.
No reflective tape is required.