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The DUALTEC explained ...PIR, MICROWAVE but WHY? (movement detector)
Dual-Tech (PIR+Microwave) Motion Sensor for Intrusion/Movement Detection
Dual Technology (PIR+Microwave) Hardwired Motion Sensor
Honeywell Wired Motion Sensors
What is a Pyronix Dual Tech PIR and how does it work?
Dualtec Motions and Interference
PIR motion detector - HOW IT WORKS (easy to understand)
Vintage Duotector Dual Tech Pulse Operating Passive Infrared And Microwave Motion Detector NJF4089
Wired Microwave Motion Sensor Detector
alarm security detector- Dual PRI+MW microwave sensor little preview and assembled
How to Install the DUAL TEC DT8000 and IS3000 Series PIRs
Dual tec motion sensor (almost there)
