Spirometer Manufacturers

Industry Knowledge

How Temperature and Humidity Affect Spirometry Readings

Spirometry is a critical tool in respiratory diagnostics, measuring lung function by assessing the volume and flow of air that a patient can inhale and exhale. However, to ensure the reliability and accuracy of test results, it is essential to consider the influence of environmental factors—especially temperature and humidity. These elements can significantly affect spirometer performance and data interpretation.

At Suzhou Texnet, we understand how sensitive medical diagnostic equipment can be to environmental changes. Founded in 2002 and located in Suzhou Industrial Park—just an hour’s drive from Shanghai—we specialize in high-quality medical disposable products that are trusted by healthcare institutions worldwide. Our experience in supplying to hospitals, pharmacies, and nursing homes across Europe, North and South America, the Middle East, and Southeast Asia has taught us the importance of environmental stability in medical applications.

Temperature’s Impact on Spirometry
The air exhaled during a spirometry test is warm and saturated with water vapor, typically at body temperature (37°C). When this air enters a cooler spirometer, it can cool down and contract, which may reduce the measured lung volumes unless the device corrects the readings to BTPS (Body Temperature and Pressure, Saturated) conditions. Without BTPS correction, tests conducted in colder rooms or climates might underestimate pulmonary function, leading to misleading results.

As a supplier with CE and ISO 13485 certification by TUV and FDA registration, Suzhou Texnet emphasizes the importance of accuracy and compliance in all aspects of medical diagnostics. Whether you're using our disposable mouthpieces or flow sensors for spirometry testing, you can trust that each product supports high-performance standards under a range of environmental conditions.

Humidity’s Effect on Accuracy
Humidity introduces additional challenges. Exhaled air is fully saturated with moisture, and when it encounters cooler surfaces within the spirometer, condensation can occur, which may affect airflow sensors and lead to inaccurate readings. High ambient humidity can also interfere with pneumotach-based spirometers by altering pressure differentials and clogging the airflow path with moisture.

To address these issues, it's vital to use equipment in climate-controlled environments and perform regular calibration under consistent humidity and temperature conditions. At Suzhou Texnet, our dedicated quality control (QC) team ensures that all components we supply—such as filters, tubing, and disposable sensors—are manufactured to meet these exacting standards, supporting accurate readings in any clinical setting.

Commitment to Quality
Over the past three decades, Suzhou Texnet has evolved from a small startup into a leading global medical supply company. As a comprehensive one-stop solution provider, we help streamline procurement, simplify shipment logistics, and guarantee consistent quality across all product lines.

Every client inquiry is seen as an opportunity to demonstrate our commitment. Our responsive customer service team and stringent QC protocols ensure that whether it's a batch of disposable spirometer accessories or a customized medical kit, the quality remains impeccable—even under variable environmental conditions.