Respiratory Resistance Tester

Test equipment for Medical Mask Respiratory Resistance

Application：

SM-DH117 is used to measure the inhalation resistance and exhalation resistance of respirator and mask protective equipment under specified conditions. It is applicable to the relevant inspection and inspection of ordinary labor masks, dust masks, medical masks, and smog masks by national labor protection article inspection institutions and mask manufacturers.

Standard：

GB2626-2006 Respiratory protective equipment Self-priming filter anti-particulate respirator 6.5 6.6 GB / T 32610-2016 Technical specifications for daily protective masks.

Technical index：

1.The instrument is composed of a gas source with adjustable flow rate, a human head model specified by the standard, inspiratory and expiratory tube systems, and a respiratory resistance measurement system.

2.The flow sensor has high sensitivity and a very small initial flow.

3.The flow sensor chip uses a thermal mass flow meter, without temperature and pressure compensation, ensuring high-precision measurement of the sensor. The flow meter range is 0 L / min ～ 100L / min, and the accuracy is ± 2%.

4.Multiple sensors are integrated on a single flow sensor chip, which greatly improves the range ratio of the sensor.

5.The flow sensor has high zero-point stability, full-range high stability, full-range high accuracy and excellent repeatability, and features low power consumption, low pressure loss and fast response speed.

6.The data recorder adopts graphic dot matrix LCD with a resolution of 128 × 64, full Chinese interface, easy to operate.

7. There is 4M memory in the data logger for measurement value recording.

8. The micro-pressure gauge sensor adopts two-wire system, with high precision and good stability; it is safe and reliable to use explosion-proof design.

9. The range of the micro-pressure gauge sensor is continuously adjustable outside the zero point, the damping is adjustable, there is no mechanical movable part, and the maintenance workload is small. The micro-pressure measuring range is -1000Pa ～ 1000Pa, and the accuracy is 1Pa.

10. The whole instrument adopts special pneumatic circuit conversion components, which ensures that the exhalation and inhalation two cannula system conversion is convenient and fast.

11. The suction volume of the suction pump is not less than 40L / min ~ 100L / min

12. The ventilation volume is constant at (85 ± 1) L / min

13. Power supply: AC220V, 50Hz

14. Applicable to the latest national standard requirements, compatible with labor protection masks and daily protective masks standards