The MMTC CP-4-100 Probe Loop Detector is a free-exit vehicle detection system designed for automatic gate operation in residential and commercial access control applications. This self-contained probe detector senses moving metal vehicles and triggers gate activation as vehicles exit the property, eliminating the need for traditional saw-cut loop installations.
The CP-4-100 operates on 12–24VAC/DC power and includes a 100-foot direct burial cable for flexible installation. Manufacturer listings state the probe can provide coverage for driveways up to approximately 12 feet wide. Compatible with many electric and solar-powered gate operators, the system is designed for reliable outdoor operation and simplified installation.

