Mask Breathing Resistance Tester

Purpose:It is used to measure the inspiratory resistance and expiratory resistance of respirators and masks under the specified conditions. Applicable to the national labor protection supplies inspection agency, mask manufacturers related inspection and inspection of ordinary masks, dust masks, medical masks, anti-fog mask products.

Technical Parameters：

1. The instrument consists of an air source that can adjust the flow rate, a human head mold specified by the standard, two intubation systems for inhalation and exhalation, and a respiratory resistance measurement system.

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

3. The flow sensor chip uses a thermal mass flow meter, which does not require temperature and pressure compensation, ensuring high-precision measurement of the sensor. The range of the flow meter 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 zero point stability of the flow sensor is high, with full range and high stability, high accuracy over the full range, excellent repeatability, low power consumption, low pressure loss and fast response speed.

6. The data logger uses a graphic dot-matrix LCD with a resolution of 128 × 64 and a full Chinese interface for easy operation.

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

8.The micromanometer sensor uses a two-wire system, with high accuracy and good stability; it is safe and reliable to use in an explosion-proof design.

9. The range and zero point of the micromanometer sensor are continuously adjustable outside, the damping is adjustable, there is no mechanical moving part, and the maintenance workload is small. The micro-pressure measurement range is -1000Pa to 1000Pa, and the accuracy is 1Pa.

10. The entire instrument uses special air path conversion elements to ensure that the expiration and inhalation of the two casing circuit systems are convenient and fast.

11. Suction pump suction volume 40L / min ~ 100L / min

12. Constant ventilation (85±1) L / min

13. Power supply: AC220V, 50Hz

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