Ionisation smoke alarm - Revision history

Editor at 12:24, 17 December 2020

2020-12-17T12:24:17Z

2020-12-15T07:44:43Z

← Older revision		Revision as of 07:44, 15 December 2020
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	* The causes of false fire alarms in buildings.		* The causes of false fire alarms in buildings.

−	[[Category:~~Products_/_components~~]] [[Category:DCN_Product_Knowledge]]	+	[[Category:DCN_Definition]] [[Category:DCN_Guidance]] [[Category:DCN_Product_Knowledge]] [[Category:Products_/_components]]

2019-09-15T07:16:23Z

← Older revision		Revision as of 07:16, 15 September 2019
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	* Carbon monoxide.		* Carbon monoxide.
	* Carbon monoxide detector.		* Carbon monoxide detector.
		+	* Characterising smoke from modern materials and evaluating smoke detectors.
	* Domestic smoke alarms DG525.		* Domestic smoke alarms DG525.
	* Fire detection and alarm system.		* Fire detection and alarm system.
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	* The causes of false fire alarms in buildings.		* The causes of false fire alarms in buildings.

−	[[Category:Products_/_components]]	+	[[Category:Products_/_components]] [[Category:DCN_Product_Knowledge]]

2019-09-15T07:01:52Z

← Older revision		Revision as of 07:01, 15 September 2019
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	Ionisation smoke alarms should conform to BS EN 14604: 2005 - Smoke Alarm Devices.		Ionisation smoke alarms should conform to BS EN 14604: 2005 - Smoke Alarm Devices.
		+
		+	Characterising smoke from modern materials and evaluating smoke detectors was written by Raman Chagger and published by BRE in 2014 states that:
		+
		+	{\|
		+	\| Ionisation detectors use a small radioactive source (americium-241) inside an ionisation chamber that contains charged electrodes. The chamber is arranged to allow a flow of air from outside. As the air enters it becomes ionized, generating an electric current between the charged electrodes. When smoke particles pass into the chamber the ions become attached to them and are carried away, leading to a reduction in the current. More ions are stripped away when there are many small particles, such as those generated during flaming fires. When a material is smouldering it tends to produce fewer but larger particles than it does when in flames. As these cause less current reduction, ionisation detectors are inherently less responsive to the large smoke particles generated during smouldering fires.
		+	\|}
		+
		+	Ref [https://files.bregroup.com/research/Test-Fires-Characterisation_2014-November.pdf https://files.bregroup.com/research/Test-Fires-Characterisation_2014-November.pdf]

	= Related articles on Designing Buildings Wiki =		= Related articles on Designing Buildings Wiki =

2019-08-11T10:48:28Z

← Older revision		Revision as of 10:48, 11 August 2019
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	Ionisation smoke alarms should conform to BS EN 14604: 2005 - Smoke Alarm Devices.		Ionisation smoke alarms should conform to BS EN 14604: 2005 - Smoke Alarm Devices.

−	~~= Find out more =~~	+	= Related articles on Designing Buildings Wiki =
−		+
−	=== Related articles on Designing Buildings Wiki ===	+

	* Carbon monoxide.		* Carbon monoxide.
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	* New requirements for fire detection and alarm network systems IP 12 13.		* New requirements for fire detection and alarm network systems IP 12 13.
	* Optical smoke alarm.		* Optical smoke alarm.
		+	* Over £1 billion lost every year due to false alarms.
	* Smoke detection in high ceiling spaces.		* Smoke detection in high ceiling spaces.
	* Smoke detector.		* Smoke detector.

2018-05-02T16:10:20Z

← Older revision		Revision as of 16:10, 2 May 2018
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	=== Related articles on Designing Buildings Wiki ===		=== Related articles on Designing Buildings Wiki ===

		+	* Carbon monoxide.
	* Carbon monoxide detector.		* Carbon monoxide detector.
	* Domestic smoke alarms DG525.		* Domestic smoke alarms DG525.

2017-12-23T08:36:11Z

← Older revision		Revision as of 08:36, 23 December 2017
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	* Carbon monoxide detector.		* Carbon monoxide detector.
		+	* Domestic smoke alarms DG525.
	* Fire detection and alarm system.		* Fire detection and alarm system.
	* Fire detector.		* Fire detector.
	* Fire.		* Fire.
	* Heat alarm.		* Heat alarm.
−	* Intruder alarm.
	* Multi-sensor alarm.		* Multi-sensor alarm.
	* New requirements for fire detection and alarm network systems IP 12 13.		* New requirements for fire detection and alarm network systems IP 12 13.

2017-12-17T10:22:40Z

← Older revision		Revision as of 10:22, 17 December 2017
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	* Multi-sensor alarm.		* Multi-sensor alarm.
	* New requirements for fire detection and alarm network systems IP 12 13.		* New requirements for fire detection and alarm network systems IP 12 13.
−	* Optical smoke alarm	+	* Optical smoke alarm.
		+	* Smoke detection in high ceiling spaces.
	* Smoke detector.		* Smoke detector.
	* The causes of false fire alarms in buildings.		* The causes of false fire alarms in buildings.
−	* The role of codes, standards and approvals in delivering fire safety.

	[[Category:Products_/_components]]		[[Category:Products_/_components]]

2017-10-21T09:24:13Z

← Older revision		Revision as of 09:24, 21 October 2017
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	=== Related articles on Designing Buildings Wiki ===		=== Related articles on Designing Buildings Wiki ===

−	* Building regulations.
−	* Scottish building standards.
	* Carbon monoxide detector.		* Carbon monoxide detector.
−	* Combustion appliance.
−	* Fire and rescue service.
−	* Fire dampers.
	* Fire detection and alarm system.		* Fire detection and alarm system.
	* Fire detector.		* Fire detector.
−	* Fire protection engineering.
−	* Fire safety design.
	* Fire.		* Fire.
	* Heat alarm.		* Heat alarm.
	* Intruder alarm.		* Intruder alarm.
	* Multi-sensor alarm.		* Multi-sensor alarm.
		+	* New requirements for fire detection and alarm network systems IP 12 13.
	* Optical smoke alarm		* Optical smoke alarm
−	* Principal habitable room.
	* Smoke detector.		* Smoke detector.
	* The causes of false fire alarms in buildings.		* The causes of false fire alarms in buildings.

2016-10-04T08:27:47Z

← Older revision		Revision as of 08:27, 4 October 2016
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	* Smoke detector.		* Smoke detector.
	* The causes of false fire alarms in buildings.		* The causes of false fire alarms in buildings.
		+	* The role of codes, standards and approvals in delivering fire safety.

	[[Category:Products_/_components]]		[[Category:Products_/_components]]