SIEMENS AD-11P

In the first place, the Siemens AD-11P is air duct monitoring housings. When used with a compatible smoke detector, smoke and combustion products are detected for shutdown of the duct system and/or operation of supplementary equipment as provided by the system control panel.When the Siemens AD-11P is operating, a sample of air is drawn from the duct as well as passed through the sampling tube. Also, the air sample passes through the smoke detector mounted in the duct housing and is exhaust back into the duct through the outlet sampling tube.