TORK GA21 METAL BODY EXPROOF GAS ALARM DEVICE

GA 21 Metal Body Exproof Gas Alarm Device Operating voltage:12-24VAC,12-24VDC Body:Aluminum injection BASIC INFORMATION The gas alarm device with exproof housing is designed to warn if there is any natural gas or LPG leakage in potentially explosive areas such as industrial kitchens and boiler rooms. It is an electrical alarm device that is installed in a fixed place and works continuously. Thanks to its relay output, it automatically switches to devices such as aspirator, siren, gas cut-off valve in case of alarm. The concentration limit of air or certain flammable gases that will not cause explosion or flashing is called the Lower Explosion Limit (APS). When the APS value of natural gas is 5% and the APS value of LPG is 2%, the gas alarm device starts to give an alarm when the gas leakage reaches the %UEL value. • It is not necessary and useful for alarm systems to measure up to 100% LEL. Measurements between 0% and 20% LEL are sufficient. If it is desired to monitor the gas level in the environment, the 4-20mA output of the device can be used. The 4-20mA output of the product gives an output signal between 4mA and 20mA depending on the gas level in the environment. • The lower explosion limit of the device for natural gas is 0.5% (five per thousand) or 5000ppm (five thousand per million). • The lower explosion limit for LPG is 1.5-2% by volume, and 0.3-0.4%, ie 20% LEL level, at which the leakage concentration reaches, is the accepted alarm value. WORKING AREAS The gas alarm device with ex-proof enclosure is used in industrial kitchens, boiler rooms and similar explosive areas.