RANCANG BANGUN CHAMBER SENSOR ELECTRONIC NOSE MODEL SISTEM DINAMIS UNTUK SAMPEL TEH; DESIGN SENSOR CHAMBER OF ELECTRONIC NOSE DYNAMIC SYSTEM FOR TEA

Sagita, Pulung P, Triyogatama Wahyu Widodo

2015 | Skripsi | FMIPA

During this time, identification of aroma still using the human smell to sophisticated equipment. However, the equipment is expensive and require an expert to operate it. Consistency human smell can not be constant or still subjective. Electronic nose based on unselected gas sensor array has ability to identification the odour. In this research has been made a sensor chamber of electronic nose dynamic system. Sensor array consists of sensors MQ-7, TGS2600, TGS2602, TGS2610, TGS2611, TGS2612, TGS2620, TGS813, TGS822, TGS825, TGS826, and TGS832. Sensor chamber is made from duralumin with symmetrical shape. Testing flushing performed by varying the air flow rate of 1-4 liters/minute, collecting time 20-60 seconds, and purging time 60-80 seconds. The stability of the sensor is measured by calculating the value of repeatability. The results showed that the design of this sensor chamber can respond aroma shown with flushing time of 150 seconds, collecting 60 seconds and purging 80 seconds. Response sensor output showed stable results with high repeatablity by maximum RSD value only 12%. Output signal of the sensor there is almost no noise because there given low pass filter circuit on the sensor array.

Kata Kunci : sensor chamber; aerodynamic; sensor array; sensor response.