Discover the new DS939 Ceiling-Mount Intrusion Detector with an unmatched mounting height of up to 25 feet. 
The DS939 employs state-of-the-art intrusion detection technology for outstanding performance. First Step Processing helps reduce false alarms caused by background disturbances. 

Easy installation, precise pattern control, reduced false alarms, excellent catch performance and an unparalleled 25-foot mounting height - you get it all with the DS939!

The DS939 also features three independent PIRs which can be individually adjusted for customized coverage. Provide standard floor coverage or monitor the main floor plus an elevated loft area at the same time.

Features:

• to 25-ft. (7.6 m) mounting height
• Fully adjustable optics for coverage integrity and customization
• Hinged chassis and base with flip-top design for easy installation
• High efficiency LED and Light Pipe System for easy walk testing
• First Step Processing
• Up 360° by 70 ft. (21 m) coverage