The Buhl Spirometer is a compact and reliable device designed to help patients monitor and improve their lung function. Capable of measuring forced vital capacity (FVC) up to 7 liters, it provides accurate feedback on respiratory performance, making it a valuable tool for both clinical and home use. The indicator needle registers the maximum inhalation achieved and remains in place until manually reset, allowing users to track progress over time. Lightweight and portable at just 6 ounces, the spirometer is easy to handle and can serve as an incentive exerciser for patients recovering from respiratory conditions, surgery, or those aiming to strengthen pulmonary capacity. Its simple, mechanical design ensures ease of use without the need for batteries or power sources, making it a convenient and dependable tool for lung health monitoring. Specifications Usage & Application Measures forced vital capacity (FVC) up to 7 liters Can be used as an incentive exerciser for lung function improvement Design & Build Mechanical needle indicator registers maximum inhalation until reset Lightweight: 6 ounces Portable and easy to handle