Accurate acousto-optic alarm, large screen display, simple operation, with intelligent sensor. All these advantages centre on a small but solid gas detector KT-602 which is applied to multi gas detection. As the most sensitive multi gas alarm detector in the present industrial circle, KT-602 responds quickly and accurately to the toxic gas, in order to alarm in time if the leakage or danger occurred. Hostile operating environment is a stern challenge for the detector, such as broiling, severe cold, damp, dusty, etc. KT-602 was designed for exceedingly rugged surroundings, with explosion-proof and flame retardant crust, light and portable. Inspection and alarm will be continuous even if the detector were dropped or crashed. It is the primary inspection tool with high performance-price ratio and multiple functions in the field of multiple gas detecting.