1、 Execution standards：

HJ 194-2017 Technical Specification for Manual Monitoring of Environmental Air Quality

HJ 194-2017/XG1-2018 "Technical Specification for Manual Monitoring of Environmental Air Quality" Amendment No.1

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

HJ/T376-2007 "Technical Requirements and Testing Methods for 24-hour Constant Temperature Automatic Continuous Environmental Air Sampler"

JJG 956-2013 Verification Regulations for Atmospheric Samplers》

Scope of Application：

This product is applied to NOx and SO in the atmosphere2Sampling, using a four channel atmospheric sampling device with solution absorption method, four channel sampling, respectively collecting atmospheric samplesNOxAnd SO2Each channel has separate flow control and regulation functions. It is an ideal choice for indoor environmental testing departments, environmental monitoring departments, industrial and mining enterprises, and health and epidemic prevention departments in various construction projects to collect various toxic and harmful gases, and can also be used for parallel sample collection.

3、 Main features：

1. Each sampling channel has only one sampling container interface;

2. Sampling mode: 1) Channel selection: Single channel, dual channel, and four channel modes can be selected, supporting separate setting of sampling parameters for each mode; 2) Sampling method selection: Supports single sampling and cyclic sampling modes, and can set the sampling time and interval for each sampling (cyclic sampling);

3. Sampling tasks can be manually/timed to start;

4. Constant current function: using electronic mass flowmeter, can set and maintain a constant sampling flow rate;

5. Automatic accumulation function of standard flow rate: automatic accumulation of sampling flow rate (standard flow rate);

6. Environmental parameter measurement function: automatic measurement of ambient atmospheric pressure and ambient temperature;

7. Operating condition flow conversion and automatic accumulation function: Based on standard operating condition flow and environmental parameters, the operating condition flow is automatically converted and accumulated;

8. Automatic diagnosis and alarm function for faults during the sampling process, recording alarm information;

9. Sampling record storage and query: record sampling events and sampling process parameters (sampling history);

10. Power off protection function: After a power outage, it can save sampling records, fault records, and the previous sampling parameters;

11. Call auto start function: can continue to maintain the previous sampling task, and manually intervene to exit the task within the specified time;

12. Gas drying function: used to dry the gas entering the flow control system, with an effective volume of not less than 0.3L, and filled with silicone gel;

13. Absorption bottle: meets the technical requirements specified in Appendix A of GB/T15436-1995, and is compatible with two different specifications of glass absorption bottles, 10mL and 50mL;

14. Rechargeable battery: The battery life of a rechargeable battery is ≥ 3 hours.

4、 Main parameters：