Meet The pulmonary function module that allows precise measurements in just one breathing manoeuvre, even if home visits are made. The custo spiro protect is the gold standard in bacterial and viral filters gives your patients maximum protection against infection. It is not necessary to disinfect the measuring head in a time-consuming procedure and product lifetime is significantly increased. Other Product features include the custo spiro protect: The gold standard in bacterial and viral filters, Exchangeable measuring head made of high-strength ceramics on the inside, for consistent measurement results, and Sensor technology with two pressure sensors for precise measurements.