1、 Product Overview

The JH-2020 constant temperature and constant current continuous automatic atmospheric sampler applies the solution absorption method to continuously collect various pollutants such as SO2 and NOx in the ambient air at a constant temperature and constant current for 24 hours. Suitable for routine monitoring of gaseous substances in departments such as environmental monitoring, environmental assessment, health, safety supervision, military, scientific research, and education.

2、 Execution standards

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

JJG 956-2013 Atmospheric Sampler

JJG956-2000 Atmospheric Sampler

3、 Performance characteristics

1. Dual use AC/DC, with built-in lithium battery. When the cooling function is not activated, the continuous power supply time is more than 30 hours when fully charged;

2. Semiconductor refrigeration technology, pollution-free, high refrigeration efficiency;

3. Electronic flow meter, flow rate without fluctuation, constant current sampling, any channel can be single * controlled;

4. The high-speed processor automatically calculates and controls the sampling flow rate, and compensates for flow changes caused by voltage fluctuations and resistance changes;

5. Equal interval sampling, the sampling frequency can be set arbitrarily between 1 and 99 times;

6. During the sampling process, the power supply status of the automatic monitoring system is automatically monitored. When the AC power is disconnected or the built-in lithium battery voltage is low, the current sampling status is automatically memorized, and when it is powered on again, the previous sampling is automatically restored;

7. Energy saving protection function: When the system is not working in standby mode under battery power, it will automatically shut down one hour after startup, maximizing battery savings;

8. The air circuit is equipped with anti backflow suction drying bottles to prevent the absorption liquid from being sucked back;

9. Pipeline blockage protection function: During the sampling process, if the pipeline is blocked or the load is too large, the system will automatically stop the pump to protect the instrument from damage due to long-term overload. If the load is greater than negative 20kPa for a long time, the protection function will be automatically activated;

10. Automatically measure ambient atmospheric pressure and temperature, display real-time sampling flow rate, cumulative sampling volume, and standard condition volume;

11. Automatic measurement of ambient temperature, constant temperature control of test solution;

12. Built in real-time clock, can pre-set sampling start time;

13. Low frequency brushless diaphragm pump with long service life;

14. Red and blue dual color air path connecting pipe, easy and accurate connection of air path;

15. The Chinese LCD display screen with automatic contrast adjustment can work normally at sub zero temperatures;

16. Equipped with a height adjustable triangular bracket;

17. Equipped with RS232 digital communication interface, it can be connected to an external printer for convenient data output.

4、 Technical parameters