Features

	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.

Specifications

	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