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Encyclopedia > Explosimeter

An explosimeter is a device which is used to measure the amount of combustible gases present in a sample. The device operates on the principle of resistance proportional to heat -- a wire is heated, and a sample of the gas is introduced to the hot wire. Combustible gases burn in the presence of the hot wire, thus increasing the resistance and disturbing a Wheatstone bridge, which gives the reading. A Wheatstone bridge is a measuring instrument invented by Samuel Hunter Christie in 1833 and improved and popularized by Sir Charles Wheatstone in 1843. ...


A flashback arrestor is installed in the device to avoid the explosimeter igniting the sample external to the device.


External links

  • http://www.marineengineering.org.uk/testequipment/explosimeter.htm (select explosimeter from the left frame)

  Results from FactBites:
 
Explosimeter - Patent 4348888 (3026 words)
Conventional explosimeters which determine explosibility are usually specific to one gas; combustible gases widely different in chemical structure give different readings at the lower explosive limit.
It is always convenient and often essential for an explosimeter to be portable.
1 is a schematic diagram of two-part explosimeter according to the invention;
Explosimeter - Wikipedia (251 words)
Explosimeter, auch genannt EX-Messgeräte oder kurz EXmeter, können explosionsfähige Gas-Luftgemische anzeigen.
Oft werden Explosimeter in Bereichen mitgeführt, in denen die Gefahr besteht, dass durch Betriebsstörungen explosionsfähige Gemische entstehen.
Technisch bestehen Explosimeter meistens aus einem Wärmeleitfähigkeitsdetektor, der regelmäßig mit einem Gasgemisch kalibriert und überprüft wird.
  More results at FactBites »


 

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