Products Menu Panasonic Sensors Mitsubishi Electric Control System Cognex Vision and Barcode Readers Epson Robots Koganei Pneumatics AirTAC Nitta Moore Tube, Hose and Fitting Convum Vacuum System NemaAsia Solutions Patlite Products Sanyo Denki SPG 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.