Combustion products alarm

摘要: A combustion products detector of the ionization chamber type comprises a reference and signal arranged in series for connection across direct current source such as dry battery. An insulated gate field effect transistor is with its drain electrode to high side source, law side; connected common junction chambers; resistance chambers parallel. control amplifier supplies circuit producing preliminary alarm or proximity upon predetermined increase product density full an additional increase. The may be produced throbbing undulating sound.