We report a method for synthesizing tellurium (Te) whiskers, both solid and hollow, with reproducible morphology and geometry. The approach based on tellurium evaporation in a hydrogen atmosphere enables precise control over whisker characteristics through the adjustment of key process parameters: crucible temperature, substrate temperature, their temperature gradient, and hydrogen pressure. The paper demonstrates the possibility of direct integration of an individual Te whisker into a micro-sensor structure and presents the results of rapid evaluation of room-temperature NO₂ sensing for whiskers of two diameters (28 and 60 μm). At the concentration of 5 ppm, the sensor achieves sensitivity S~10 %, while the minimum detected concentration is 0.3 ppm for the 28 μm whisker. The device exhibits a reproducible and reversible response highlighting its potential for application in miniature low-power gas analyzers. Keywords: tellurium whiskers, gas sensors, nitrogen dioxide (NO₂), sensor response.