Spirometer: PDD-301/sh and PDD-301/shm feauturs a sleek design ergonomic form and just one USB connection to the PC. The PDD-301/shm version has built-in ambient temperature, pressure and humidity sensors for the full automatic BTPS correction. The spirometer is the basic device of the functional lung diagnostics. It is vital in detecting the early malfunction of the respiratory system, including COPD, Asthma, Chronic bronchitis, Obstructive ventilation disorder, and Emphysema. The PinkFlow flow-meter and the spirometer fully complies with the specifications of the Standardization of Lung Function Testing ATS/ERS Task force.