1、 Execution standards：

HJ/T375-2007 "Technical Requirements and Testing Methods for Environmental Air Samplers"

JJG956-2013 "Verification Regulations for Atmospheric Samplers"

GBZ/T 159-2004 Sampling Specification for Monitoring Hazardous Substances in Workplace Air

2、 Scope of application:

This instrument adopts a solution absorption method to collect multiple toxic and harmful gases (such as SO2, NOX, etc.) in the ambient atmosphere through two channels. Suitable for monitoring and sampling at all levels of environmental monitoring stations, safety supervision, occupational health monitoring institutions, industrial and mining enterprises, research institutes, education and other departments.

3、 Main features：

1. The sampling pump is an imported membrane pump, which runs smoothly, has low noise, and has a long service life;

2. The instrument adopts a multifunctional timing control module, LCD display, and precise time control; Three methods can be set: timed sampling, delayed sampling, and cyclic sampling;

3. Using lithium batteries without memory effect, there is no need to discharge before charging;

4. Optional constant temperature heating system ensures that it can sample at low temperatures;

5. The sampling time can be set arbitrarily within 99h59min;

6. Independent dual pump sampling.

4、 Main parameters：