The CO1224T and CO1224TR detectors features RealTest®, the industry’s first functional test for the detector’s CO sensing cell. RealTest enables you to know the detector is providing the protection it promises. Designed for system connection, the CO1224T and CO1224TR enables you to maximize profits and minimize installation costs with code-compliant features, such as a trouble relay that sends a sensor failure or 10-year end-of-life signal to the control panel and SEMS-type terminal Philips-head screws that provide a quick and positive wiring connection while facilitating wiring supervision. The CO1224T and CO1224TR unit also features a low current draw, which allows more detectors to be connected to the panel without having to purchase a more expensive panel or extra power supply.