GS-IIIB Atmospheric SamplerDetailed product description：

The GS-IIIB atmospheric sampler (hereinafter referred to as the instrument) is an improved product. It is an essential sampling instrument for short-term collection of harmful gases such as TVOC, SO2, NOX, Hg2, CL2, S2H in the air by environmental protection personnel in engineering quality indoor testing, environmental monitoring stations, disease control centers, scientific research units, colleges and universities, and industrial and mining enterprises, or for collecting two different harmful gas samples.

This instrument adopts a dual motor, dual pump, dual absorption, and drying bottle gas path structure. During the sampling process, the flow rates of the two flow meters do not interfere with each other and remain stable. The design of the drying bottle not only prevents water vapor from entering the flowmeter and causing flow errors, but also prevents accidents caused by the absorption liquid being drawn into the instrument due to the wrong connection of the two ports of the absorption bottle. The instrument can be controlled by both hands and by oneself. Compared with the old model instrument, this instrument has the following main improvements:

Power supply: AC/DC dual-use: using a sealed battery (inside the machine) for power supply, saving the trouble of dragging power cords on site, especially suitable for field sampling without power supply. The sampling time is long, usually fully charged, and can be used continuously for 4-6 hours. This instrument can also be connected to an external AC 220V power supply for sampling.  
Timing selection: Timing selection is convenient and intuitive. After the timing button installed on the panel is set, the pump starts as soon as it is turned on, and stops immediately when the sampling time is up. If the sampling time is the same, there is no need to reset the time each time it is turned on, and the timing selection can be set to a minimum of seconds.  
Voltage indication: The time display has added a digital display function for the working voltage, which can intuitively and reliably monitor the voltage status of the battery (power supply).  
This instrument has the characteristics of small size, light weight, and easy portability.
Voltage display: It has the function of displaying voltage.  
Alarm function: In order to extend the battery life, this instrument has added low voltage alarm and disable functions.  
Reminder function: This instrument will emit a beep sound 30 seconds before the scheduled sampling ends.

2、 Main technical data:

flow range	Dual flow rate 0.1-1.5L/min
Flow error	±5%
Traffic Stability	±5%
time control	Can be set arbitrarily within 0-99min and 59 seconds
power supply	Built in battery 6V (or external AC220V)
Host size/weight	300*140*180mm/4kg