Abstract
A propane gas detector was built based on the semiconductor nickel antimonate oxide (NiSb2O6) by means of an analog electronic circuit. The gas detector was designed for monitoring atmospheres where the leakage of propane gas could possibly occur. The prototype’s construction methodology is presented in 5 stages: (1) synthesis of NiSb2O6 oxide powders, (2) characterization of the powders by XRD and TEM, (3) manufacture and electrical characterization of the chemical gas sensor, (4) design of the analog circuit based on the electrical response of the gas sensor, and (5) functionality tests. The gas detector was built at low cost and showed excellent functionality. The operating conditions were as follows: 200°C, gas concentration of 5 ppm, electronic circuit gain of 5, and sensor sensitivity of 0.41.
Highlights
Health assurance systems are very important in industrial processes because they help prevent and eliminate emergencies, saving human lives and avoiding high economic costs
The prototype’s construction methodology is presented in 5 stages: (1) synthesis of NiSb2O6 oxide powders, (2) characterization of the powders by X-ray diffraction (XRD) and transmission electron microscopy (TEM), (3) manufacture and electrical characterization of the chemical gas sensor, (4) design of the analog circuit based on the electrical response of the gas sensor, and (5) functionality tests
Propane gas detection systems play a very important role in the work with boilers because they prevent possible explosions due to failures in flame control [5]. These protection systems basically consist of a chemical sensor for propane gas and an electronic circuit for signal adaptation
Summary
Health assurance systems are very important in industrial processes because they help prevent and eliminate emergencies, saving human lives and avoiding high economic costs. Propane gas detection systems play a very important role in the work with boilers because they prevent possible explosions due to failures in flame control [5] These protection systems basically consist of a chemical sensor for propane gas and an electronic circuit for signal adaptation. Semiconductor materials are being thoroughly studied to be applied as gas sensors This is because materials like the semiconductor oxides show interesting chemical and physical properties when the surface of these materials come into contact with an oxidizing or reducing gas. Their response is affected when the surface reacts chemically or physically with the molecules of test gases, varying the conductance and resistance as a function of concentration [6,7,8] This change in electrical properties depends on the type of semiconductor material (p-type or n -type) [6, 7].
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