Laser through-beam sensor, transmitter Functional principle: through-beam sensor Transmitted light source: laser Light colour: red / 670 nm Laser class: 1 (IEC 60825-1) Range: 0 . 500 mm Operating voltage: 10 . 35 V DC Ambient temperature during operation: 0 . +50 °C Protection class: III, operation on protective extra-low voltage Connection: plug, M8, 3-pin