Products Menu Panasonic Sensors Mitsubishi Electric Control System Cognex Vision and Barcode Readers Epson Robots Patlite Products Koganei Pneumatics AirTAC Oriental Motor Nitta Moore Tube, Hose and Fitting Convum Vacuum System THK Shimpo Reducer NemaAsia Solutions Humphrey Vision Sensors Checker® sensors are easy to use and affordable. They are used to check the presence and size of parts and products. Can be used in a wide range of applications where traditional sensors cannot provide solutions.