Large Volume Breathing Resistance Tester

Large Volume Breathing Resistance Tester

MODEL: SM4309B

The Large volume breathing resistance tester is used to measure the inhalation and exhalation resistance of under specified conditions.

Wear the test sample on the matching head mold in an airtight manner, adjust the ventilation capacity to 30L/min and 95L/min, measure and record the maximum suction resistance, and then test the expiratory valve with a large ventilation capacity of 300L/min for 30s;

SM4309B tester is equipped with a large flow air pump with adjustable flow rate, two sets of pipeline systems for inhalation and exhalation, flow sensor and other resistance measuring devices; The system can automatically control the ventilation and measure the inhalation and exhalation resistance.

Testing Standards:  

Specification：

1. The measuring accuracy of flow rate is ± 2%;

2. The range of the differential pressure is -1000Pa - 1000Pa, accuracy 1%, resolution is 1Pa;

3. Exhalation volume: 160L/min continuous flow;

4. Inhalation: 30L/min and 95L/min continuous flow;

5. Valve test: 300L/min continuous flow, 30s.