Integrated simple calibration, automatic calibration and zero back and automatic compensation programs. 4 concentration indicator design, in which different indicators correspond to different detection values from high to low. A bright LED indicator displays power and requires battery status for replacement. Portable gas detector, compact body, fast response to quickly detect leaks. The case is made of high-quality ABS plastic, which is dust-proof, explosion-proof, splash-proof and has a long service life. There are anti-slip wefts on the sides of the case and also has convenient buttons and holes that emit. Quality high-sensitivity sensors, with built-in temperature compensation and calibration coefficients, are characterized by high precision and linearity; provides high stability and response recovery speed. The extended flexible probe with flexible arc adjustment is suitable for a variety of special scenarios. The alarm and light design requires a concentration indicator and a buzzer to sound an alarm when combustible gases reach a certain value. alarm. radiation and electromagnetic interference to reduce false alarms. Wide application scenarios meet detection needs, suitable for oil and petrochemicals, natural gases, gas pipeline detection, cooking gas detection, restaurants and hotels, chemical plants, truck- tanks, etc.