In industry the exact position of the metal tool in CNC or Lathe machines or the robotic arms in automated systems is very important and essential to ensure your program is working correctly. Also counting the number of parts on a production belt is necessary to keep the data logged. This Ky-036 Metal Touch Sensor Module is a low cost solution of the above mentioned problems. It has a LM393 Comparator IC on board which will provide Digital Output to be connected to GPIO Pins to your microcontroller. It also has resistive potentiometer to change the sensitivity of the output to touch. It also has M2 sized bolt holes for easy installation. Technical Specifications: Main chip: LM393 Working voltage:  DC 5V Channel: Single signal output Sensitivity: Adjustable Pin Connector to board: 4 Pins Output signal: Digital and Analog Output Low-level  used for human body touch sensor alarm Package Includes: 1 Piece–KY-036 Human/Metal Touch Sensor Module