Portable Nitrogen N2 Gas Detector LNGD-A10 is integrated with multiple gas sensors and, 3.5-inch high-definition LCD colour screen display and 150-degree wide viewing angle. Equipped with built-in gas sampling pump with adjustable ten-speed flow and flow range of 0 to 500 ml/min. Features mini vacuum suction pump with stable flow. Designed with flashlight, overload automatic protection function, and built-in wireless communication module. It can detect up to 1-5 gases simultaneously. It has a Measurement Range of 0 to 100 % VOL,  response time of ≤ 8s and precision  of ≤±2 % FS.