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Saturday, November 16, 2013

How do Fire Alarms Work?

 How Do Fire Alarm Systems Work?

 A fire alarm system works by detecting fire by one or more of its detection devices. These devices send a warning message to the fire alarm control panel which in turn sends a signal through a dedicated line to an alarm receiving centre. The ARC then contacts the fire rescue service. 

There are two basic types of fire alarms or smoke detectors. One is equipped with a light beam, and if smoke is in the room, it will break the light connection, causing the alarm to go off. The other is based on connectors, and if smoke breaks the connection, it will set the alarm off. The smoke detectors used are the ionization detector and the photoelectric detector. Most fire alarms use either one or both the types of detectors.

Ionization Detectors

Ionization detectors have a small quantity of Americanum-241 that serves as the source of ionizing radiation. The alpha particles that are constantly released by Americanum-241 strike with the oxygen and nitrogen atoms in the air. This knocks off electrons from the oxygen and nitrogen atoms resulting in the formation of positively charged ions. Ionization detectors also have an ionization chamber which houses two plates about a centimeter apart. The battery that is used to run the alarm applies a low voltage to the plates, due to which one plate gets positively and the other gets negatively charged. The positively charged ions of oxygen and nitrogen gas get attracted to the negative plate whereas the electrons released from the atoms of these gases move towards the positive plate. This generates a small continuous electric current within the alarm. As long as this current is flowing within the detector, the alarm is not set off. However, once the circuit is broken, the alarm rings out. In case of a fire when smoke enters the ionization chamber, the smoke particles attach to the positively charged ions and neutralize them. This results in a drop in the current that triggers off the alarm.

Photoelectric Detectors

In photoelectric detectors, the alarm is set off once the straight path of light beam inside the photoelectric chamber gets disrupted by smoke particles. Photoelectric detectors have a T-shaped chamber that contains an incandescent bulb or an infrared LED which acts as a light source. There is a lens in these fire alarms that collimates the light being emitted from the light source into a beam. There is a photodiode or some other photoelectric sensor at the base of the vertical arm of the T-shaped photoelectric chamber that acts as a light sensor. In the absence of smoke, the beam of light travels in a straight path without coming in contact with the light sensor. However, once the smoke particles enter the photoelectric chamber, the beam of light strikes them and get scattered to hit the light sensor. Once the light rays strike the light sensor the alarm is triggered off.

Points to be Considered

Over 85% of the houses in the United States have fire alarm systems installed in them. Given this fact, the number of fire related casualties should have been way below the recorded statistics. Does this mean that most of the accidents caused due to fire take place in the remaining 15% of the houses that do not have fire alarms? This interpretation doesn't sound feasible. The fact is that just installing a fire alarm does not guarantee safety from fire breaking out in the house. Once installed, these devices need to be regularly checked if they are in working condition to ensure fire safety. While some fire detectors work on batteries, there are others that are powered by the mains electricity of the house. In case of the battery-run fire alarms, one should be aware if the batteries need to be replaced. (The batteries used in fire alarms usually last for a year). In case of fire alarms that run on electricity, it is always advisable to have a battery back up so that the fire alarm can alert the residents of a house in case there is a fire breakout when there is no power supply.

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Tuesday, October 1, 2013

Top security product categories

Top security product categories


  •     CCTV camera lenses
  •     Intruder detectors 
  •     IP cameras 
  •     Analogue Transmission 
  •     IP Dome cameras 
  •     Access control readers
  •     CCTV 
  •     Access Control 
  •     Intruder Alarms
  •     Integrated Systems 
  •     CCTV cameras
  •     Dome cameras
  •     Digital video recorders (DVRs) 
  •     Audio, video or keypad entry
  •    

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List of Upcoming Fire Exhibitions

List of Upcoming Fire Exhibitions

October

Name: CIPS Central Asia 2013
Date:  8th - 10th October 2013
Venue:  Uzexpocentre, Tashkent
Country:  Uzbekistan
Website:  http://www.ca-ips.com/

Name:  International Water Mist Conference 2013
Date:  16th - 17th October 2013
Venue:  Paris
Country:  France
Website:  http://www.iwma.net

Name:  Caspian International Protection, Security and Rescue Exhibition
Date:  23rd - 26th October 2013
Venue: CIPS Caspian 2013 Baku Expo, Baku
Country: Azerbaijan
Website: http://cips.iteca.az

Name:  Fire India
Date:  24th - 26th October 2013
Venue:  Bombay Exhibition Centre, Goregaon, Mumbai
Country:  India
Website:  http://www.fire-india.com/

November

Name:  SICHERHEIT 2013
Date:  12th - 15th November 2013
Venue: Messe Zürich, Zürich
Country: Switzerland
Website: http://www.sicherheit-messe.ch

Name:  22nd Saint Petersburg International Security and Fire Exhibition
Date:  12th - 15th November 2013
Venue: Lenexpo, St. Petersburg, Russia
Country: Russia
Website: http://sfitex.primexpo.ru/en/

Name:  Warsaw International Safety & Security Exhibition
Date:  19th - 21th November 2013
Venue:  Modern Exhibition Centre EXPO XXI, Warsaw
Country: Poland
Website: http://wise.lentewenc.com/home/

Name:  IFSEC & OSH Arabia
Date:  24th - 26th November 2013
Venue: Riyadh International Conference and Exhibition Centre (RICEC)
Country: UAE
Website: http://www.ifsec-osh-arabia.com
2014

Name:  Intersec 2014
Date:  19th - 21st Janaury 2014
Venue:  Dubai International Convention and Exhibition Centre
Country:  Dubai
Website:  http://www.intersecexpo.com

Name:  TB Forum 2014
Date:  11th - 14th February 2014
Venue:  Crocus EXPO // Pavilion 2, Hall 8, Moscow,
Country:  Russia
Website:  http://www.eng.tbforum.ru/home/

Name:  Sicur 2014
Date:  24th - 28th February 2014
Venue:  Madrid Exhibition Centre, Madrid
Country:  Spain
Website:  http://www.ifema.es/ferias/sicur/default_i.html

Name:  Saudi Safety and Security (SSS 2014)
Date:  02nd - 05th March 2014
Venue:  Dhahran International Exhibitions Centre, Dammam
Country: Kingdom of saudia Arabia
Website: http://www.sss-arabia.com

Name:  Kiev International Protection, Security and Fire Safety (KIPS)
Date:  04th - 06th March 2014
Venue:  IEC, Kiev
Country: Ukraine
Website: http://en.kips.com.ua

Name:  Secutech International
Date:  19th - 21st March 2014
Venue:  Taipei
Country: Taiwan
Website: http://www.secutech.com

Name:  MIPS 2014 - 20th International Exhibition «Protection, Security and Fire Safety»
Date:  14th - 17th April 2014
Venue:  VVC, Moscow
Country:  Russia
Website:  http://mips-expo.com/

Name:  Safety & Security Asia (SSA)
Date:  28th - 30th April 2014
Venue:  Marina Bay Sands, Singapore
Country:  Singapore
Website:  http://www.safetysecurityasia.com.sg

Name:  Firex International
Date:  17th - 19th June 2014
Venue:  Excel, London
Country:  UK
Website:  http://www.firex.co.uk

Name:  IFSEC International
Date:  17th - 19th June 2014
Venue:  Excel, London
Country:  UK
Website:  http://www.ifsec.co.uk

Name:  Security & Fire Vietnam 2014
Date:  26th - 28th June 2014
Venue:  Saigon Exhibition and Convention Center (SECC), Ho Chi Minh City
Country:  Vietnam
Website:  http://www.construction-vietnam.com

Name:  Security Essen
Date:  23rd - 26th September 2014
Venue:  Messe Essen, Essen
Country:  Germany
Website:  http://www.security-essen.de
2015

Name:  INTERSCHUTZ 2015
Date:  07th - 13th June 2015
Venue:  Hannover Expo Centre, Hannover
Country: Germany
Website: http://www.interschutz.de/homepage_e
 

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Fire safety companies

Company name      Primary business area           Primary coverage

Services International    Fire safety                                         Global
Shelian Systems                      CCTV                                       India
Shenzhen JinZeYuan Science and Technology Ltd.    CCTV    China
Shenzhen Lingbao Electronics Co Ltd    Explosives and chemical detection    Global
Shenzhen RDS Industrial Co., Ltd.                             CCTV    Global
Sicurbrin di Porcelluzzi Giuliano               Electronic article surveillance    Italy
Sigma Engineered Solutions Ltd    Integrated security    Global
SKJ Electronics & Systems    Integrated security    India
Stormin Protection Products Inc.    CCTV    United States of America (USA)
Suraksha Management    Integrated security    India
Tappan Wire & Cable Inc.    Cables    United States of America (USA)
Tech Fire Engineers    Access control    India
Techies Sols                                                                     CCTV    India
TechVision Security Consultants Pvt Ltd    Physical security    Asia
Teclogsys Logitech Techno Systems Pvt. Ltd.    Fire safety    India
TEKN

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Fire india 2009

Start Date: 07 September, 2009 at 09:00 am
End Date: 09 September, 2009 at 05:00 pm
Where: Bombay Exhibition Centre
Nesco Compound

Goregaon(east)
Mumbai , Maharashtra
Zipcode: 400063
Website: http://www.fire-india.com
Phone: 91-11-45055572 / +91-9350230869
Phone: 91-11-45055500/ 45055573
Email:


 

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