System Sensor CO1224T Carbon Monoxide Detector The System Sensor CO1224T is a great little unit for keeping you and your family safe from the dangers of carbon monoxide poisoning. The CO1224T is wired to the main panel and installed on the wall of your home or business and will detect any quantity of CO gas in the environment for up to 6 years.This model has a Real Test feature that will allow you to test the detector with a can of canned CO to make sure that it is working properly when you first install it. System Sensor CO1224T Install ManualSystem Sensor CO1224T Data Sheet Specifications Electrical Specifications Operating Voltage 12/24 VDCAudible Signal 85 dB in alarmStandby Current 20 mAAlarm Current 40 mA (75 mA test)Alarm Contact Ratings 0.5 A @ 30 VDCTrouble Contact Ratings 0.5 A @ 30 VDC Physical Specifications Size: CO1224T Length: 5.1 in, Width: 3.3 in, Height: 1.3 inCO1224TR Diameter: 6 in, Height: 1.3 inApproximate Weight CO1224T: 7 oz ; CO1224TR: 11 ozOperating Temperature Range 32?F to 104? F (0?C to 40? C)Operating Humidity Range 22 to 90% RHInput Terminals 14 to 22 AWGMounting Single-gang back box; surface mount to wall or ceiling RealTest? enables a functional test using canned CO Full compliance with UL 2075 A code-required trouble relay Wiring supervision with SEMS terminals A six-year end-of-life timer 12/24 VDC A low current draw of 20 mA in standby and 40 mA in alarm Versatile mounting for wall and ceiling Accurate and reliable electrochemical sensing technology Optional CO-PLATE CO Detector Replacement Plate to upgrade previously installed competitor detectors to the CO1224T