How pet-immune motion detector works
Many people hesitate to purchase a home alarm, worried they may have to leave their family pet outside in order to arm their alarm system. The concern was that the…
CCD or CMOS Camera
Image sensor is the most important component for any CCTV security camera. This image sensor converts light into a digital signal. The two most basic types today are CCD (Charged…
When a wired burglar alarm system better than a wireless one
While there are so many wireless burglar alarm system in the market, the existence of wired burglar alarm system still has its un-parallel value in the market. There are features…
CCTV Lens Calculator
Lenscalc – Online Lens Calculator Lenscalc is a universal tool designed to eliminate the frequent errors, mis-readings, and interpolation problems associated with traditional lens calculators. It provides a streamlined solution…
Most places without landline laid, my alarm unable to dial out!
Nowadays major burglar alarms provide a dial-out function so owners of the premised guarded can be informed by phone call whenever there is alarm triggered. In occasions, there is no…
How installation of Pet-immune PIR motion detector reduce false alarm?
Mostly users find there are quite amount of false alarm from PIR motion detectors even those they have been claimed pet immunity. PIR is not so miraculous that can distinguish…