Gas analyzer: With internal pump, our KP668 portable gas analyzer is developed on the infrared detection principle. This device is endowed with high accuracy and excellent stability for its single light source & double tube air chamber technology. KP668 adopts advanced digital circuit processing technology, colorful touch screen, ultra-large capacity lithium battery for long stand-by time. It is mainly applied in the gas analysis of gas, chemical, cement, metallurgy, electric power and other fields. According to the variety of sensor, this device can be used for the detecting of various gases, such as SO2, NOX, CO2, CO, CH4, N2O, SF6, etc.