N-50 series air leak tester meet the requirements of air tightness detection, IP67/68/69K waterproof grade test, self-diagnosis, absolute measurement, cycle test, curve analysis, correction of thermal effect and other functions; The product adopts differential pressure detection principle, the international leading patent valve body structure, greatly ensure the stability and accuracy of data. With positive pressure, negative pressure, positive and negative pressure detection function, the maximum positive pressure up to 30MPa, resolution up to 0.1Pa or 0.001ml/min, support RS232, RS485, USB data transmission and network port communication, at the same time to provide two channels, four channels for choice.