Seco-Larm Seco-Larm E-964-S50TB Mini Single Photobeam Sensor, 50' JMAC# SECO-LARM-E-964-S50TB The Seco-Larm E-964-S50TB is a simple, easy-to-use, and easy-to-install single-beam infrared motion sensor with 4 selectable frequencies. The device easily installs almost anywhere to provide an invisible beam that, when broken, sends a signal to... MSRP: Was: Now: $25.75 Add to Cart