Development of control board for air quality monitoring detector

Development of control board for air quality monitoring detector

Description of technical parameters of the scheme:

◆ It can simultaneously monitor gas parameters and inhalable particles, and display the detected values on the screen;

◆ When it is used as a portable instrument, it can continuously and automatically sample and automatically analyze, abandoning the traditional operation of reagent configuration → on-site sampling → laboratory analysis and atmospheric sampler;

◆ Imported sensors with high sensitivity are used, which have fast response speed, high resolution, good linearity, and the lower detection limit can reach ppb level;

◆ The measurement of concentration value can realize the switching of mg/m3, ppm and ppb units, with dynamic image display;

◆ Large screen graphic LCD display is adopted, which can intuitively and dynamically display various detection data, graphics and instrument working status, and provide full Chinese menu and friendly human-computer dialogue interface;

◆ The combination of SCM technology and network communication technology and the use of data storage function can not only provide convenient data query methods; The data can also be transferred to the computer through USB interface, and the supporting upper computer software can be used to automatically calculate the daily average value, monthly average value, pollution index, generate various graphic data labels, and print them;

◆ The lithium battery inside the machine or the external AC mains power supply is adopted. If the external power supply is cut off, the battery inside the equipment can supply the instrument with 8 hours of continuous operation;

◆ Stable performance, high * * * degree, convenient operation, easy maintenance, and power failure protection function.

Detection gas type:

SO 2: Detection range: 0-2ppm Resolution: 0.001 ppm

NO 2: Detection range: 0-2ppm Resolution: 0.001 ppm

O 3: Detection range: 0-5ppm Resolution: 0.01ppm

CO: Detection range: 0-50ppm Resolution: 0.1ppm

H 2 S: Detection range: 0-2ppm Resolution: 0.01ppm

HF: Detection range: 0-2ppm Resolution: 0.01ppm

Detection parameters of inhalable particles:

Detection range: 0-100mg/m3 (optional); Resolution: 0.01 mg/m3

Detection range: 0-10mg/m3 (optional); Resolution: 0.001 mg/m3

Technical parameters:

Gas monitoring principle: constant potential electrolysis method

Particulate matter: light scattering method and? Ray method

Operating temperature: 5-40oC

Storage temperature: - 20-40oC

Operating humidity: ≤ 15% - 85% RH non condensing

Precision: ± 2% F. S

Linearity: ± 2% F. S

Zero drift: ± 2% F. S

Zero drift of measuring range: ± 2% F. S

Response time:<150s

Working life of sensor:>2 years

Sampling flow: 300ml/min

Sampling mode: pump suction

Power supply mode: internal lithium battery power supply (3.6V * 3)/external AC power supply (AC220V 50Hz 1.0A)

Communication interface: RS485 and USB data transfer interface

Battery charging time: 10 hours

Battery working time: 8 consecutive hours

Application field:

Urban atmospheric environment monitoring, enterprise environmental monitoring, unorganized emission of pollutants from factories and plants

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