Omron E3JK-DS30M1 AC/DC 5 wire Diffuse Reflection Photoelectric Switch Sensors . The basic purpose of a proximity sensor is to perceive the occurrence of any object without being in contact with it. A proximity sensor makes a field around it by emitting electromagnetic radiation. The beam of electromagnetic radiation traces any object or hurdle in its way. The sensor looks for any alteration made in its field. Target usually replaces a certain beam of the field or hurdles its projection. Diffuse reluctance    Working Voltage: 220VAC    Detection Distance:20-100CM adjustable  5 wire  relay output  Maximum drive current 3A  Simple installation  Distribution fixed mounting bracket and fixed screws  Body Size:5 x 5 x 1.8cm/2" x 2'' x 0.7'' (L*W*T)  Cable Length:1.2m Features: BOX COUNTING OBSTACLE DETECTION positioning, limiting, Detecting Dynamic Motion conveyor system Specifications: Switch Type: Photoelectric Model Name/Number: E3JK-DS30M1 Brand: Omron Shape: CUBICAL Sensing Distance: 300 mm Current Rating (In Amps): 3 AMPS Power/Voltage: 12-240VAC/DC Size: 50 X 50 X 18 Product Code: E3JK-DS30M1 Uses Detecting objects on conveyor belts Position sensing in automation systems Product presence detection on assembly lines Counting items in production processes Safety detection and machine control integration Package Include: 1 x Omron E3JK-DS30M1 AC/DC 5 wire Diffuse Reflection Photoelectric Switch Sensors