Abstract: Invention is the innovative apparatus to determine plant seeds quality rate in a dormant stage. Aim of the invention is measuring quantity of carbon dioxide radiance on active seeds to calculate average of the germination, the vigor, and a proportion of the value of the light radiated seeds to calculate viable. Apparatus use process of the spectral lighting to warm up seeds to obtain thermal contrasting Infra-red images, to visualize seeds embryos metabolism. The contingent seeds embryos intensity of the radiance is taken in account to determine seeds measurement of the viability, of the vigor indicative. Due to order to create the specimen seed embryo radiometric profile data, recording digital images of the seed unit's specimen data enable to derive, and then calculate the Infra-red contrast value of seed specimen profile. Light titrations of the seeds thermal exposition, due to seeds specimen rotation, eliminate irregularity of the seed layer lighting.