With our Spirometer Sensor, students can easily measure flow rate, pressure, and lung volume, making it perfect for human physiology courses. The mouthpieces are designed for single-student use and include exchangeable filters to maximize safety. The sensor safely and accurately measures both outward (expiration) and inward (inspiration) airflow. This sensor ensures hygienic use and prevents the inhalation of particulate matter with filters. Additional mouthpieces are available in convenient packs of ten.