System Sensor D4120 4-Wire Photoelectric Duct Smoke Detector
$ 68.64
Description
System Sensor D4120 4-Wire Photoelectric Duct Smoke Detector. Plug-in Sensor: The sensor head (the 2151 we discussed earlier) is replaceable without removing the entire duct housing. 4-Wire Versatility: It can be powered by 24VDC/VAC or 120VAC, making it compatible with almost any fire alarm or building automation system. Advanced Sensing: Features a pivoting housing that fits both square and round ducts. Plug-in Sensor: The sensor head (the 2151 we discussed earlier) is replaceable without removing the entire duct housing. Easy Testing: Has a transparent cover so you can see the status LEDs without opening the unit.
