Development of TGS2611 methane sensor and SHT11 humidity and temperature sensor for measuring greenhouse gas on peatlands in south kalimantan, indonesia

International Conference on Physical Instrumentation and Advanced Materials

物理学;材料科学

Sugriwan, I.^1 ; Soesanto, O.^2

Department of Physics, Universitas Lambung Mangkurat, Jl. A. Yani KM 36, Banjarbaru Kalimantan, Selatan

70714, Indonesia^1

Department of Mathematics, Universitas Lambung Mangkurat, Jl. A. Yani KM 36, Banjarbaru Kalimantan, Selatan

70714, Indonesia^2

关键词: Characteristic equation;    Data acquisition system;    Data-communication;    Humidity and temperatures;    Measuring instruments;    Methane gas sensors;    Power supply unit;    Relative humidity and temperatures;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/853/1/012006/pdf
DOI  :  10.1088/1742-6596/853/1/012006

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

The research was focused on development of data acquisition system to monitor the content of methane, relative humidity and temperature on peatlands in South Kalimantan, Indonesia. Methane is one of greenhouse gases that emitted from peatlands; while humidity and temperature are important parameters of microclimate on peatlands. The content of methane, humidity and temperature are three parameters were monitored digitally, real time, continuously and automatically record by data acquisition systems that interfaced to the personal computer. The hardware of data acquisition system consists of power supply unit, TGS2611 methane gas sensor, SHT11 humidity and temperature sensors, voltage follower, ATMega8535 microcontroller, 16 × 2 LCD character and personal computer. ATMega8535 module is a device to manage all part in measuring instrument. The software which is responsible to take sensor data, calculate characteristic equation and send data to 16 × 2 LCD character are Basic Compiler. To interface between measuring instrument and personal computer is maintained by Delphi 7. The result of data acquisition showed on 16 × 2 LCD characters, PC monitor and database with developed by XAMPP. Methane, humidity, and temperature which release from peatlands are trapped by Closed-Chamber Measurement with dimension 60 × 50 × 40 cm3. TGS2611 methane gas sensor and SHT11 humidity and temperature sensor are calibrated to determine transfer function used to data communication between sensors and microcontroller and integrated into ATMega8535 Microcontroller. Calculation of RS and RL of TGS2611 methane gas sensor refer to data sheet and obtained respectively 1360 ohm and 905 ohm. The characteristic equation of TGS2611 satisfies equation VRL = 0.561 ln n - 2.2641 volt, with n is a various concentrations and VRL in volt. The microcontroller maintained the voltage signal than interfaced it to liquid crystal displays and personal computer (laptop) to display result of the measurement. The result of data acquisition saved on excels and database format.