... Gas sensor, Gas measuring, Gas detector ,Deigned in Germany, Made in China. Gas sensor , Gas measuring,Gas detector ,Dieigned in Germany,Made in ChinaDesign of the gas measuring systemThe sensor ... -20mA ;max. Load 500 ohmsPin(+)24 V DC ± 5%Ambient temperature-20 centigrade to 40 centigradeTemperature range -40 centigrade to +60 ...