Design of Chlorine Gas Online Detect Instrument Based on MSP430

The current situation shows that the homemade chlorine gas online detect instrument is low in precision and simple in functions, the import instrument is too expansive and only has the short communication distance with the control center. A chlorine gas online detect instrument was developed. Adopting MSP430 processor and constant electrolytic gas sensor, it can measure the concentration of chlorine gas in the air, give an alarm when the concentration of chlorine gas is out of range and communicate with the control center by GPRS. The measurement range of the device is 0_~20 ppm, response time is less than 30 sec and the detecting error is less than 2%. This design is feasible and can meet the real application in papermaking industry, textile industry, pharmacy and water treatment industry.