The di-soric laser distance sensors of the LAT 51 series cover a wide operating range. The integrated electronic analysis circuitry is housed in a robust metal housing. Simply structured yet effective, the auto-teach process allows the user to program the respective measuring range and the switching range with the press of a single button. Thanks to a highly responsive transmission power adjustment system, the signal sequences transmitted through the output will remain identical, even if the surfaces vary greatly. An additional switch output signals whether the object to be measured is within the programmed measuring range. Capable of foreground + background suppression, this switch output can also single-handedly provide the solution in a great number of applications. An external control line can be used to both start the external auto-teach process and enable the key lock function.