Main uses:

The mask respiratory resistance tester is used to measure the inhalatory resistance and expiratory resistance of respirators and
masks under specified conditions. It is applicable to the relevant testing and inspection of ordinary masks, dust-proof masks,
medical masks and anti-haze mask products by national labor protection equipment inspection institutions and mask manufacturers.
Fields of application
It is used for the relevant testing and inspection of ordinary masks, dustproof masks, medical masks, and anti-haze mask products
by national labor protection equipment inspection institutions and mask manufacturers.

Features:

 The mask respiratory resistance tester is used to measure the inhalation resistance and expiratory resistance of respirators and
mask protective equipment under specified conditions. It is applicable to the relevant testing and inspection of ordinary masks,
dust-proof masks, medical masks and anti-haze mask products by national labor protection equipment inspection institutions and
mask manufacturers.

Technical parameters:

Flow metering range 0 L/min~100L/min, accuracy of ±2%
The micro-pressure metering range is -1000Pa~1000Pa, and the accuracy is 1Pa
The pumping capacity of the air pump is 40L/min~100L/min
Constant ventilation (85±1)L/min
Power supply AC220V, 50Hz
Enforce the standard
GB 2626-2019,GB/T 32610-2016,YY/T 0969-2013,GB 2890-2009,GB19083-2010

Functional Features:

1. The instrument is composed of an air source that can adjust the flow rate, a human head mold specified in the standard, two
sets of inhalation and exhalation pipeline systems, and a breathing resistance measurement system.
2. The flow sensor has high sensitivity and a very small starting flow.
3. The flow sensor chip adopts a thermal mass flowmeter, which does not require temperature and pressure compensation, which
ensures the high-precision measurement of the sensor.
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, high stability of full scale, high accuracy and excellent repeatability of full
scale, and has the characteristics of low power consumption, low pressure loss and fast response speed.
6. The data logger adopts a graphic dot matrix liquid crystal with a resolution of 128×64, a full-Chinese interface, and is easy
to operate.
7. There is 4M memory in the data logger for recording measured values.
8. The micromanometer sensor adopts a two-wire system, with high precision and good stability; It adopts explosion-proof design,
safe and reliable to use.
9. The range of the micromanometer sensor and the zero point are continuously adjustable externally, the damping is adjustable,
there is no mechanical movable part, and the maintenance workload is less.
10. The whole instrument adopts a special air path conversion element to ensure that the conversion of the two sets of pipeline
systems of exhalation and inhalation is convenient and fast.