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Laser Tachometer LT-880

Tachometer HeadLaser TachometerFeatures

No special reflective tape required

Custom cable length to 300 m

TTL compatible output

Rep rate to 40 KHz

Ni-Mh powered with quick recharge

 The LT-880 Laser Tachometer is a non-contact instrument designed to sense the presence or absence of a reflective surface in its optical beam. A TTL signal is asserted whenever a reflective surface is placed within its field of view. The signal may be used with a counter or spectrum analyser to sense linear translation, rpm or transient vibrations.

 The LT-880 Laser Tachometer is designed to meet the needs of the industrial user as well as for laboratory use. The ability to mount the electronics up to several hundred meters from the optical head gives the user sensing capability in harsh environmental conditions. Use of existing display equipment as a readout device provides additional savings to the user.

 The LT-880 provides ease of use with a visible laser source (670 nm) for targeting and no need for special reflective tape. Targets can be generated by any CAD software and printed in black/white form on any standard office laser printer. Options include a right angle adapter and custom fibre optic cable lengths.


Range (using white copier paper): 12 to 100 mm from exit aperture

Measurement bandwidth: 2 Hz - 40 KHz

Laser wavelength: 670 +/-10 nm

Laser power: <3 mW

Laser spot size: <1.75 mm @ 13 mm range

Laser beam divergence: <8 mrad

Output impedance: 100 ohm

Standard fibre optic cable length: 5 m

Standard fibre types: Receiver - 3 m FT-400-EMT 400 µm core, low OH ion content fused silica. Transmitter - 62.5 µm core fused silica fibre

Fibre optic connectors: ST type

Batteries supplied: Four AA 1100 A-Hr Ni-Mh cells

Optical head dimensions: 35 (L) x 13 (D) mm

Electronics package dimensions: 200 (L) x 98 (W) x 38 (D) mm

Total weight: 0.46 Kg

Ordering Information


 Laser Tachometer with LCD readout/multifunction display and 5 meters of cable and Sensor Head.

Useful Documents


LT-880 datasheet - pdf (90K)

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