Long Distance Laser Sensors by
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	Main Page / Photoelectric Sensors / Long Distance Laser Sensors / Product Comparison (XT200/XT400) / Product Comparison (YT87/YT89)
	Extreme Accuracy with Transit Time Measurement   Wenglor's new laser sensor is making headlines: Highest possible accuracy is achieved by measuring the time required for light to travel from the sensor to the target and back again. This method is very accurate over large distances. It is much more accurate than the traditional analysis of the quantity of light reflected back to the sensor, or angle measurements used for sensors with background suppression. Because the speed of light remains constant, extremely precise measurement results can be obtained - independent of direction of movement, angle, color, texture and brightness of the object. Also, the so-called edge effect (measurement error caused by lateral movement of the object into the light beam) does not influence our new sensor. The sensor's highly sensitive optics reliably recognizes black objects with a reflectance factor of less than 6%. Unnecessary downtime resulting from contamination, short-circuit at the output or weak signals is avoided with the help of an error output. Measurement data can be read out as an analog voltage signal (0 to 10 VDC), as well as a digital output. Product comparison: XT200/XT400 Product Comparison (Up to 40 meters sensing) YT87/YT89 Analog Laser Sensors (Up to 3700 mm sensing) All units are in stock for immediate delivery. Full catalogs are available. Please call for a copy.