Please note, all orders are shipped from UK.
The low cost, low resistance mouthpiece allows entry of expired air into the measuring system, but not back to the test subject. This simple, yet effective design prevents concerns of accidental inhalation of pathogens.
This is an inexpensive alternative to the bacterial viral filter for expiratory only testing. It fits most pulmonary function test equipment, including peak flow meters. An adaptor may be required.