A new series of Contrinex M18 photoelectric sensors and a sensor tester expand our selection of discrete sensors. The Contrinex M18 sensors have a short body for easy installation in even the tightest locations. These sensors are available in diffuse with adjustable background suppression, diffuse, retroreflective and through-beam models, and with NPN and PNP logic. The outputs are complementary, allowing them to be used as a light-on or dark-on sensor. Connection options include a 2 meter, 4-wire PVC cable or a 4-pin M12 quick-disconnect. An AutomationDirect sensor tester can test any DC-powered sensor of any brand for proper functionality. This tool can save time before installation or while troubleshooting. The new Contrinex photoelectric sensors and the sensor tester have a two-year warranty. Sensors testers can be found under all discrete sensor categories' Accessories page.