System Sensor COSMOD2W 2-wire Smoke CO Detector Interface Module

System Sensor 2W-B Two Wire Smoke Detector Most all modern alarm system now support this 2 wire type smoke detector. A two-wire smoke sends the power and zone circuit down the same two wires. We're often asked which type we recommend, 2 wire type or 4 wire type. If you are going to have only a few and they will all be on one level, we recommend 2 wire type. On the other hand, if you will have smoke detectors on more than one level, will have more than a four or five, or you need them with built-in sounders we then recommend the 4 wire type variety. Data SheetInstallation manual

System Sensor 2WT-B Two-Wire Smoke Detector With Built-In Heat Sensor Most all modern alarm system now support this 2 wire type smoke detector. A two-wire smoke sends the power and zone circuit down the same two wires. This model is the same as the 2w-b model except is has built-in 135-degree heat sensor as well. We're often asked which type we recommend, 2 wire type or 4 wire type. If you are going to have only a few and they will all be on one level, we recommend 2 wire type. On the other hand, if you will have smoke detectors on more than one level, will have more than a four or five, or you need them with built-in sounders we then recommend the 4 wire type variety. Data SheetInstallation manual

System Sensor 2WTA-B Two Wire Smoke Detector With Built-In Heat Sensor The System Sensor 2WTA-B is a two wire smoke detector that features a built-in 135 degree heat detector as well as an on-board sounder. The sounder provides an 85 dB warning tone to let those in the area know a fire emergency is occurring. The heat detector in this unit will trip if the temperature reaches 135 degrees. The 2WTA-B features drift compensation to help reduce false alarms by reducing false trips due to dust and other particulates. It also uses smoothing algorithms to help cut RF interference and further reduce false alarms. The smokes operate on either the 12V or 24V power structure. The 2WTA-B measures in at 5.3 in. in diameter and is 2 in. high.  Most  people wonder what the difference is between two wire and four wire smokes. Here are a few things that differentiate...