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know your detectors

Know Your Detectors and Sensors

We use different detectors and sensors to detect intrusion. These detectors may be installed externally or along the perimeter of the premises such as fence intrusions, door and window contacts.

Or they may be mounted indoor or internally such as motion sensors, panic buttons, glass break detectors and vibration sensors.


Door and Window Contacts

The most common sensors of any alarm system are the door and window contacts. Comprising a magnet and a reed switch, we detect a closed-door when the magnet aligns with the reed switch. We mount the magnet on the door or window and we mount the reed switch on the door or window frame.

These sensors can be surface mounted or concealed. And their constructions vary according to the type of windows or doors.

Motion Sensors

Motion Sensors detects and measure movement. It does this by looking for significant changes in the environment. And its typical range is up to 15 meters.

A Passive Infra-Red (PIR) Sensor detects infrared radiation from the human body. The sensor is smart enough to differentiate a moving body heat from a static heat emitted from say, a lamp. We use PIR Motion Sensors in many homes and offices.

A Microwave or Ultrasonic Sensor sends out pulses. It measures the changes in the amount of sound coming back to detect movement. They can go through walls and holes and are ideal to cover large outdoor areas.

A Dual-Technology Sensor utilises both PIR and Microwave technologies. It will detect movement only when it senses thermal and acoustic changes. Hence it is better for a noisy environment and reduces false alarm reporting. We use them in warehouses, large buildings and schools.

Perimeter Photo beam Sensors

Photobeam Sensors comprises a pair of sensors that send and receive a photobeam. They are ideal for protecting large voids such as open fields, roof areas or perimeter walls. An intruder crossing the protected area cuts the beam, triggering an alarm.

To reduce false alarms, the photobeam emits two concurrent beams. It will trigger the alarm only when an object crossed both beams at the same time.

Fire Detectors

Fire can happen. And we have different detectors to give you the head start warning you need to escape an impending fire.

Smoke Detectors are usually mounted on the ceiling in the passageway. It detects heavy smoke that rises to the ceiling, giving you an early warning.

Heat Detectors measures the rise of temperature. We install them in kitchens or in places where a Smoke Detector would not be appropriate.

Carbon Monoxide (CO) Sensor measures the level of carbon monoxide in the air. It will trigger an alarm when the level exceeds the safety threshold.

Glass Break

Glass Break Sensors detect the frequencies of breaking glass. We use them to protect premises with large glass panels such as in retail shops or office buildings.

Vibration Sensors

Vibration Sensors detect vibration created by drilling or hard knocking. They are ideal for safes, vaults, ATMs.

Panic Buttons and Kick Bars

Panic Buttons and kick bars activate an alarm when pressed. We install these at cashiers, bank tellers, customer service counters.

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