Fire Alarm Detectors (2)

Combined Smoke and Heat Detectors

Combine smoke and heat detector shall comprise of two chambers. One chamber containing the photoelectric smoke detector and the other shall contain the heat detector. The smoke detector shall utilize a horizontal optical bench construction which houses the detector and the optical sensor.

Fire Alarm Detectors (1)

1.     Photoelectric Detectors

Photoelectric smoke detectors use light and how it is reflected to detect smoke. Normally light is projected into a smoke sensing chamber inside the detector assembly. The light hits a black background of the chamber and is absorbed. When enough smoke enters the chamber it reflects the light on to a sensor inside the chamber. This causes the sensor to indicate an alarm. Photoelectric detectors are suitable for most applications giving the fastest response to slow burning fires - the most common start to fire events. Use of photoelectric detectors is highly recommended to provide coverage for escape routes due to their superior ability to detect optically dense smoke that would easily obstruct the use of escape routes.

What CCTV is?

What does CCTV stand for? CCTV means  Closed Circuit Television, which is a visual surveillance technology designed for monitoring a variety of environments and activities. CCTV systems are used in applications such as monitoring public areas for violent actions, vandalism, theft, and unlawful entry, both indoors and out. CCTV recordings are used to obtain and provide evidence for criminal and other investigations, they are sometimes disclosed to the media in the hopes of gaining information about images of a suspect or suspects caught in or near a crime scene.