The EMX PROBE-50 is a sensing probe with a 50 ft lead wire designed for use with the EMX CarSense101 CS-101 vehicle motion detector system. It is intended as a replacement or service part when you need a new probe or a different lead length option for an existing CS-101 installation. This listing is for the probe only. The PROBE-50 will not function by itself and requires the CS-101 detector module for operation and system output. When used with the CS-101, the system detects moving vehicles near the probe with an adjustable detection range up to 12 feet at a minimum vehicle speed of 5 mph, making it useful for free exit applications where you want motion-based activation. Install and route the lead wire according to EMX CS-101 instructions and your operator or access control system requirements. For full system setup and adjustment, refer to the CS-101 manual.