Fork sensors are photoelectric thru-beam sensors in a aluminium fork housing. These type of sensors are, because of the 5 kHz switching frequency, ideal for high-speed detection and counting applications where accuracy and reliability are of great importance. The OFS fork sensors of Telco Sensors are available with opening widths of 2 up to 220 mm. Standard sensors have infrared light sources, but we also deliver visible red light sources or sensors with extra high gain for harsh and wet environments. All models have a 3-pin M8 connector, PNP-NO and NC and sensitivity adjustment via potentiometer.