Passive Infrared and Microwave processing enable the DS835i to provide excellent catch performance with freedom from false alarms.
Small and unobtrusive detector offers simple installation with no field adjustments required..
The detector is able to distinguish between signals caused by humans and signals caused by pets (one dog up to 100 lbs. (45 kg), two dogs up to 60 lbs. (27 kg) or up to 10 cats). (45 kg), two dogs up to 60 lbs. (27 kg) or up to 10 cats).

Basic function:

• Signal Processing: Passive infrared and microwave technologies signal an alarm when both are simultaneously activated. Alarm signals must meet the signaling requirements of both technologies to activate an alarm. Microwave range is factory set - no adjustment is required, but field adjustments may be made if desired.
• First Step Processing: First Step Processing (FSP) allows for instant response to human targets without sacrificing false alarm immunity to other sources. By adjusting its sensitivity based on signal amplitude, polarity, slope and timing, FSP eliminates the need for the installer to select the sensitivity levels for the application.
• Microwave Signal: Adaptive Processing adjusts to background disturbances. This helps to reduce false alarms while maintaining catch performance.
• The sealed optical chamber provides immunity to drafts and insects.