What are the two types of detectors?

The two main types of smoke detectors on the market include ionization detectors and photoelectric detectors. Inside the first type, there’s an ionization chamber with two plates and a source of ionizing radiation. The alarm’s power supply sends an electrical signal to the plates.

How does the heat detector work?

Electro-pneumatic heat detectors contain a diaphragm which moves when there is a change in pressure owing to a shift in the ambient temperature. When the diaphragm moves, an electric circuit is completed, which activates the alarm. Rate of Rise – or ROR – heat detectors operate using two heat-sensitive thermocouples.

What are two type of heat detectors are?

Heat detectors are basically of two kinds: Rate-of-rise (ROR) heat detectors and fixed temperature heat detectors. Heat detectors are used in areas where smoke alarms are not suitable. Heat detectors are quite hardy and can withstand very harsh environmental conditions.

Where is heat detector are best used?

A heat detector is usually used in rooms where there is excessive dust or fumes – for instance, a garage or cellar – which a smoke alarm can mistake for dust, soot or combustible elements in the atmosphere. It’s also used in rooms where highly-flammable chemicals are stored.

Where should I install a heat detector?

Install heat detectors in areas posing a higher likelihood of high flames and intense heat, such as in garages or sheds where fuels and other flammable chemicals may be stored. Heat detectors also should be installed in high-ceiling areas where smoke may not trigger smoke alarms.

How do you test heat detectors?

To test a 521BXT for heat detection, use a hair dryer on its maximum setting to pass hot air back and forth across the device. This process should trigger an alarm and demonstrate that the heat detection function of the 521BXT is working. A successful test will be indicated by a loud siren.