Electronic Spirometer is a scientific and technological product researched and developed by our factory with which we have our own intelligence property. In August 2001, the product was passed through the appraisal organized by Jiangsu Scientific and Technological Bureau, and numbered as SuKeJianZi(2001) No. 466. Adopted intelligent monolithic microcomputer, far infrared photo-electric sensor technique and high performance and low power consumption microcomputer technique, it has flexible reaction, high accuracy and stable features. The ratio between features and price is higher than its like from abroad, and reached the leading level in the state. The meter can be powered by both AC and DC, and inner rechargeable batteries are also available, which can maintain continuous operation for 8 hours. With compact size of the meter, it can be carried out easily. This instrumet is widely used in pulmonary and respiratory departments and teaching adn studying, physical training, medical measurement for vital capacity VC, misture air capacity VT, maximum ventilation volume per minute MVV, vital cpacity in the first second FEV1 etc. The results displayed on LED can be viewed directly and correctly.