✧ The measurement theory of oxygen concentration is mainly to adopt ultrasonic technology to detect the oxygen concentration；
✧ This analyzer is used for measuring oxygen purity,oxygen flow rate and gas pressure to the PSA oxygen concentrator;
✧ It has the characteristics of high accuracy, strong anti-interference ability, rapid response；
✧ The pressure test adopts imported modules with high accuracy;
✧ The life is long and no need for regular calibrate;
✧ It adopts alkaline 9V laminated battery for easy replacement. The battery model can be 6LR61 or 6LF22.