Visual-plus-Alarm Features First compare these features with other manufacturer's products!

Failsafe feature allows an operational self check everytime you open the door. Incorporates the same simple and reliable visual features and options of the ADI-69-V Series with the addition of Audible & Visible Alarms. The ADI-69 Series unique, US & Foreign Patented design indicates the actual directional airflow. This device is sensitive enough to detect the pressure change caused by the opening and closing of the door!  An integral adjustable time delay relay (0-60 seconds) obviates false alarms that otherwise would occur under transient conditions.  Single 120VAC source with plug-in Industrial Components.  External transformers are not necessary! An integral set of Form C contacts rated at 2.5A @ 120VAC are included to allow for remote alarm monitoring and DDC interface. Expected life exceeds 200,000 cycles. An example would be opening & closing a door 27 times per day, every day for 20 years ! Click here to see the VISUAL plus Alarm Indicators!