Fire alarm heat detector

What is the use of a heat sensor on a fire alarm? Are fire alarms and smoke detectors the same thing? What are types of heat detectors in a fire alarm system? A heat detector is a fire detection device.

Since it does not detect smoke , it is therefore not meant as a replacement for a smoke detector. Heat Detectors are designed to protect property, not life. They also operate in a completely different way – as its name suggests – detecting signs of excessive heat in their vicinity, rather than smoke or fumes. Smoke detectors are intended to protect people and property by generating an alarm earlier in the development of a fire. People need time to react, and every second is critical during an actual fire event.

DETECT-A-FIRE detectors are the “heart” of many fire protection systems. These highly reliable devices have been a standard for over years. Thousands of these detectors are in use controlling the release of clean agents, CO water, or dry chemicals. The thermal mass and conductivity of the element regulate the rate flow of heat into the element.

All heat detectors have this thermal lag. Buying an electric car , and wanted to set up a heat alarm in the garage in case anything were to happen. I had to wire in a new box before installing the heat alarm. Not a big deal, but it would have made the install a little easier.

The heat detector shall be set to a lower temperature than the sprinkler head and when activate will cause an alarm at the FACU and shunt the breaker associated with powering the elevator. Free 2-day Shipping On Millions of Items. If rapid response to fire is vital, rate-of-rise heat detectors are an ideal solution where rapid temperature increases would only be caused by a fire emergency. Sometimes referred to as heat alarms, heat detectors are perhaps lesser known than smoke alarms. Combination heat detectors provide both fixed and rate-of-rise detection.

This enables the heat detector to communicate an alarm to the central control panel prior to reaching its fixed set point for high rates of rise, providing a timely response to both rapid and slow temperature increases. To check out the uses of fire alarms check here. How does a heat detector alarm work?

Heat sensors trigger an alarm by either melting a low fusing alloy or bending a bimetallic strip. Depending on its construction, a heat sensor alarm can be electronic or mechanical (mechanical alarms, in their turn, can be pneumatic or bi-metallic). An electronic heat detector alarm contains a thermistor which changes resistance as the temperature increases. Once the temperature rises above 1degrees F (C) or 1degrees F (C), the heat detector will send a signal to an alarm panel and trigger an alarm.

Rate-Compensated detector on the market. These detectors have few false alarms but, they take longer to identify a fire than a smoke detector. Heat detectors detect the presence of heat and an increase in air temperature. They’re ideal in situations where smoke detectors may cause false alarms such as steamy, humi or dusty environments. Fire Trade Supplies are distributors of Detectortesters fire alarm system test equipment including the Solo and Testifire ranges of smoke detector and heat detector test equipment.

The Testifire range also allows the testing of multi sensors including combined smoke, heat and CO detectors. Use of a pre-action system. They are professionally designed to work reliably with most fire detection system with central control equipment.

Also note there is an Annex section related to this reference.