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Types of Alarms

Glass Break Detectors
Glass Break Detectors

A glass break detector is a sensor used in electronic burglar alarms that detects if a pane of glass is shattered or broken. These sensors are commonly used near glass doors or glass store-front windows.

Magnetic Switches
Magnetic Switches

alarm. 3.8 Secure State of Switch The switch state which does not cause the control box in the secure mode to signal an alarm (compare with alarm state of switch). 3.9 Simple Magnetic Switch A magnetic switch which is not magnetically balanced.

source: ncjrs.gov
image: ebay.com
Microwave Detectors
Microwave Detectors

Detector combating false alarms: Most of the microwave motion detectors work upon the principle discussed in the previous section. However, there is a kind of disadvantages which these kinds of sensors suffer from.

Passive Infrared Motion Detectors
Passive Infrared Motion Detectors

Difference between PIR motion sensor and infrared beam motion sensor Infrared intrusion detector (sensor) mainly includes active infrared detector (AIR) and passive infrared detector (PIR). The principle of working theory is different for both kind of detectors.

source: hkvstar.com
Photoelectric Beams
Photoelectric Beams

Photobeam 3000 . Dual beam detection improves false alarm immunity; Range up to 90 m (300 ft) outdoors, 180 m (600 ft) indoors; Selectable response time

Ultrasonic Detectors
Ultrasonic Detectors

Ultrasonic obstacle sensor consists of a set of ultrasonic receiver and transmitter which operate at the same frequency. The point when the something moves in the zone secured the circuit’s fine offset is aggravated and the buzzer/alarm is triggered.

source: elprocus.com
image: woehler.de