H2S GAS SENSOR DEVICE

摘要

IMPROVED H2S DIRECT GAS SENSORABSTRACTA combined specific ion and reference electrode structurehaving an air gap, gas permeable membrane and in which the active,conducting solution has a surface tension and boiling pointwhich are great enough that with equal ambient pressures on bothsides of the membrane the active solution will neither leak norevaporate rapidly through the membrane at the temperature rangeover which the electrode structure is operated, namely -40°C. to60°C. In the preferred embodiment the active solvent as wellas the reference solvent is selected from among the class consist-ing of ethylene glycol, propylene glycol, dipropylene glycol,diethylene glycol, triethylene glycol, tetraethylene glycol,hexylene glycol, propylene carbonate, dimethyl sulfoxide anddimethyl formamide.