1、 Instrument Introduction

BS-H2 type dual air circuitconstant currentThe atmospheric sampler is an improved product developed specifically to adapt to the "Code for Indoor Environmental Pollution Control of Civil Building Engineering" (GB50325-2010) for collecting harmful gases indoors and outdoors. It can be widely used in indoor environment detection, atmospheric environment monitoring, health and epidemic prevention, labor protection, scientific research and other fields.

2、 Main features and applications
Compared with the traditional sampler, this instrument has the following characteristics:
1. In order to meet the needs of indoor environment detection and meet the sampling requirements of the "Code for Indoor Environmental Pollution Control of Civil Building Engineering" (GB50325 edition), the stability of the sampling pump has been improved. Even with a large load (connected to TENAX adsorption tube and activated carbon sampling tube), the true sampling flow rate can still be accurately displayed within the flow range required by the specification, and there will be no phenomenon of displaying flow rate falsely high.
2. This instrument displays the flow rate under standard conditions (temperature: 0 ℃, atmospheric pressure: 101.3KPa) within the required environmental conditions for use, without the need to measure environmental temperature or atmospheric pressure to correct the sampling volume.
3. The high-precision electronic flow device is used instead of the float flowmeter to realize the real-time digital display of the sampling flow. Compared with the traditional float flowmeter, the sampling accuracy is greatly improved, and the sampling error and artificial observation error are reduced.
4. Can be suitable for sampling Tenax adsorption tubes with different resistance levels in China.
5. The two sampling channels can independently set the sampling time and have time memory function to adapt to the sampling of different pollutants.
6. Dual use of AC and DC, suitable for different sampling scenarios.

3、 Main specifications and technical indicators

Normal working flow range: 100-500 sccm (sccm is standard milliliters per minute)
Maximum flow error: ± 5%
Flow stability: ≤± 1%
Electronic timing error: ≤± 0.2%
Working temperature: -5 ∽ 45 ℃
Continuous working time of battery: ≥ 6h
Communication power supply: 220V, 50HZ

Size: 26×20×16（CM）

Weight: 3.65Kg