The present research deals with the fabrication of stannous oxide nanoparticles by conventional and cost effective co precipitation method. The thick film sensors of SnO₂ nanoparticles were prepared by standard screen-printing technique by photolithography. The prepared SnO₂ material was characterized by several techniques to confirm the structural properties. Initially, the prepared nanoparticles of SnO₂ were investigated by x-ray diffraction technique to confirm the synthesis of prepared material within nanoscale. From XRD data the average particle size of prepared thick films was found to be 21.87 nm calculated using Debye-Scherer formula. The material was further characterized by using scanning electron microscopy (SEM) to investigate the structural and surface characteristic of SnO₂. SEM data clearly indicates the heterogeneous surface, and some voids present over the surface of SnO₂ nanoparticles. The Fourier transfer infra red technique was employed to investigate the metal oxygen frequency of SnO₂ material. The prepared sensor was exclusively utilized to sense the hydrogen sulfide gas vapors at various concentrations. The prepared sensor was found to be highly sensitive to H₂S vapors nearly 63.8% sensitivity was recorded. The response and recovery study shows the response time of 9 seconds and recovery time of 19 seconds for hydrogen sulfide gas vapors. The SnO₂ sensor was further utilized for recycling performance to get the firm results of sensitivity in four turns with period of 15 days.