PPM 800 and PPM 400 is the Peak flow meter which is the simplest lung diagnostics device however it can be utilized efficiently in early detection of asthma and during its treatment as well. Patient may forecast the needed dosage of anti asthma medicine. It will monitoring of asthma treatment. It has early detection of asthma. It can be utilized as hospital and home application. The peak flow meter fully complies with all requirements of the EN 13826:2003 European Standard “Peak expiratory flow meters”