Description Overview Used to measure the inhalation and exhalation resistance of the mask under specified conditions. Touch screen control. Easy to operate. Built-in thermal printer to facilitate quick printing of test results on site. High precision differential pressure sensor and digital flowmeter. High test accuracy. Two modes of breath detection. Breath detection can be set. Automatic pipeline switching device of respirator solves the problem of pipeline extubation and wrong connection when testing. 3d printed standard head mold. Can simulate the real inhalation and exhalation of human body. Improve the accuracy of data. Specifications Flow meter range: 0 to 100 l per minute. Accuracy: 3%. Differential pressure meter range: 0 to 100 pa. Accuracy: 1 pa. Pumping capacity of air pump: 100 l per minute. Printer: micro thermal printing. Power supply: ac 220v, 60hz, 650w.