PIR-9822 is a Double-Twin-Optics detection technology in signal processing. The device gives security logic and environment controls. It has the maximum immunity to false alarm. 

The PIR sensor consists two optical structures and two low noise dual element pyro sensors in one enclosure, which provides a detection pattern that responses only to the intruder, not the pets or rodents. 

The alternate polarity signal processor inside the MCU has very high rejection to the common mode noise due to radio interference or power surges on both channels. The MCU device also provides the functions of digital pulse counting, power-up delay and alarm output timing and controls. All of which maximise security and delivers unrivalled false alarm immunity. 

Features:

• Double-Twin-Optics detection technology
• Alternate polarity signal processing
• The security logics are integrated in the MCU
• Surface-mounted component technology, greater EMI and RFI immunity
• Detects the real intruders, not the pets or rodents
• Automatic temperature compensation
• Fast or pulse count response for harsh environments
• NC or NO contact output