100m Wireless Sensor for Burglar Alarm Main Unit
Roller shutters or rolling doors have many applications, including applications for vans, garages, kitchens, schools and warehouse. The door is raised to open it and lowered to close it. Both roller shutter and rolling doors provide protection against wind and rain. Now we recommend this kind of rf wireless magnetic sensor (W-13) to install to roller shutters or rolling doors to protect windows or gates from vandalism and burglary attempts. It will send signal to alarm main unit to alert people once it is triggered. This kit contains a sensor, a magnetic bar, a transmitter and 4 screws. It works with 100m in the open field. Alarm time of this kit is 5 seconds. With indication of low battery, you can change battery in time. Installation : Stick part A (magnetic bar) on the edge of the roller shutter/rolling door, and stick part B on the fixed frame of roller shutter/rolling door Note: The distance of these two parts shall be less than 3-5 cm when the roller shutter/rolli...