purpose

Used for collecting semi volatile organic compounds (SVOC) samples such as polycyclic aromatic hydrocarbons, organic pesticides, polychlorinated biphenyls, etc. in ambient air

Adopting standards

HJ 691-2014 "Guidelines for Sampling Techniques of Semi volatile Organic Compounds in Environmental Air"

main features

1. Using flow, pressure, temperature sensors, and microcontroller measurement and control technology to automatically control the flow of the vacuum pump and achieve constant flow sampling

2. Automatically measure environmental temperature, atmospheric pressure, flow rate and other parameters

3. Digitally measure parameters such as sampling flow rate (operating conditions), sampling time, interval sampling time, sampling volume (standard conditions), etc

4. Digitally calibrate flow, temperature, pressure, time, and other numerical values

5. Automatically display values such as flow rate, sampling volume (standard condition 237.15k, 101.325kPa), temperature, pressure, sampling time, power outage time, etc

6. Overload automatic protection: During the sampling process, if the sampling flow rate is less than 90% of the set sampling flow rate for 5 consecutive minutes, the instrument will automatically shut down for protection

7. Power outage protection function: During the sampling process, if there is a power outage, the sampling data can be automatically saved, and sampling can continue after the power is restored

8. Can store 100 sets of sampling data and power outage data, with a retention period of 10 years

9. Adopting a brushless fan, it has a long service life, can run for 20000 hours without faults, and has low noise

TECHNICAL INDEX

1. Sampling flow rate: 700L/min; Accuracy: better than 2%; Stability: better than 2% (SVOCs sampling)

2. Timing accuracy: better than 0.1%

3. Sampling flow rate setting range: (200~1200) L/min (up to 1200L/min for particulate matter and benzo [a] pyrene sampling)

4. Temperature measurement range: (-55~150) ℃; Resolution: 0.1 ℃; Accuracy: 0.3 ℃

5. Atmospheric pressure measurement range: (50~140) kPa; Resolution: 0.01kPa; Accuracy: better than 2 ‰

6. Load capacity: can overcome 19kPa resistance at 700L/min

7. Sampling method:

Quantitative sampling: Sampling volume setting range (1~9999999.9) L (standard condition)

Immediate sampling: Sampling time setting range (00h01min~24h00min)

Timed sampling: Set the starting time range (00:00~23:59)

Sampling time setting range (00h01min~24h00min)

Interval sampling: 99 interval samples can be set within 24 hours

8. Working voltage: AC (220 ± 22) V, 50Hz