The solid state reaction route is adopted to synthesize NaNbO₃ with the aim to examine their structural, morphological and electrical behaviour of material with sintering time. The crystal phase is formed without any secondary phase at calcination temperature 800 °C. The article shows the scope of material to be used as a sensor in piezoelectric applications. The synthesized material has been avoided to heat for longer time and has been sintered at 2 h, 4 h and 6 h. The refinement of experimental X-ray diffraction pattern displays crystallization of material in Orthorhombic phase with space group Pbcm and lattice parameters a = 5.513752 Å, b = 5.568852 Å, c = 15.52854 Å, α = β = γ = 90°. A gaussian distribution of grain size with statistical average 0.722 μm, 0.841 μm and 0.842 μm has been observed for NN02, NN04 and NN06 respectively. The NN04 shows maximum piezoelectric coefficient d₃₃* = 110 pm V⁻¹, piezoelectric strain 0.0021% and smallest as asymmetric factor Y_s = 0.204 with respect to other investigated samples.