• Remote Sensing of RPM and Angular Vibration
  • No Special Reflective Tape Required
  • Large 5 Digit LED Display
  • Sensing rates to 40 000 PPS
  • Ni-mH Powered with Fast Charger
  • Measures RPM, RPS, PPS
  • Entry of number of encoder sectors

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 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. 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 throught the heads 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.

Explore the product and its fascinating features further on our blog: Orbitron Blog about LT 880

Ordering Information

LT-880Fiber Optic Laser Tachometer (Includes 5 Meter Cable with Reflective Sensor Head)
LT-880-10Fiber Optic Laser Tachometer (Includes 10 Meter Cable with Reflective Sensor Head)
LT-880-TFiber Optic Laser Tachometer (Includes 5 Meter Cable with Transmissive Sensor Head)
LT-880OH-RF5 Meter Cable w/Reflective Sensor Head for use with LT 880
LT-880OH-T5 Meter Cable w/Transmissive Sensor Head for use with LT 880
RAA-LT-880Right Angle Adapter for use with LT-880 Reflective Optical Head

LT 880 technical data
Units of Measurement Revolutions per Second, Revolutions per Minute, Pulses per Second
Measurement Update Rate ±. .02 % of Reading, ±. 1 LSD
Maximum Measurement Rate 40 000 PPS
Range from Sensor to Target 12 to 125 mm (using white copier paper)
Laser Wavelength 650 nm ±.10 nm
Laser Output Power < 2 milliwatts
Laser Spot Size < 1.9 mm @ 13 mm range
Laser Beam Divergence < 13 milliradians
Display Six Digit LCD, 0.375 height, Six LED annunciators
Frequency Output Port TTL pulse for each reflective sector sensed, (0 to 5 volts)
Output Impedance 100 Ohms
Standard Fiber Optic Cable Length 5 meters
Standard Fiber Types Receiver - 400 u m core, Transmitter - 62.5 um core
Standard Connector Type ST Type
Batteries Supplied Four AA NimH, 2700 mAH
Charger Power Requirements 95 - 260 VAC, 50-60 Hz Universal, < 10 VA
Mains Connectors Supplied North American, Great Britain, Continental Europe, Australian
Charging Time Approximately two hours
Dimensions (Controller) 200 mm L x 98 mm W x 38 mm D
Dimensions (Sensor) 40 mm L x 13 mm Diameter, 1/2 by 20 Thread, Jam Nuts Included
Operating Temperature, Electronics, Sensor Head 0 - 50 C, - 40 - 120 C
Weight 0.46 Kg
Accessories Provided Carrying Case, Batteries, Power Supply/Charger, Operating Manual
Standard Warranty Two years, Components and Workmanship, 30 Day Satisfaction Guarantee

Laser Tachometer LT-880

Available Options

Tags: Laser Tachometer, LT-880, RPM Sensor, Angular Vibration, Remote Sensing, Reflective Markings, NiMH Powered, LED Display