... are widely used in industries. It has CE Bimetal thermometer Manometer is widely used in petroleum,petrochamical,power,pharmaceutical,chamical ... SteelWindow: Glass Bulb: Copper alloy, adjustable at end Pocket: Brass, friction at axial of thermometer case, fixing by screw for option ... -20 to 60 deg CRelative humility lower than 85%Electric contact capacity 10VA (max electric current 1A,max voltage 22V)