Abstract—Nitric oxide (NO) gas is extremely dangerous and can cause health problems such as respiratory infections, poisoning and lung damage. In addition NO gas is colorless and odorless. In this study a sensors based on thin films of zinc oxide (ZnO) nanorod structure is fabricated using dip coating method and Chemical Bath Deposition (CBD) to detect NO gas. The results of the characterization of SEM, EDS, and XRD showed that thin films of ZnO nanorod structures have been successfully fabricated on an alumina substrate. The sensors have good ability to measure changes in the concentration of NO gas. The optimum working temperature of the sensors is 300ºC with a sensitivity of 90.62%. The sensor can distinguish the concentration of NO gas at a concentration of 10ppm, 30ppm, 50ppm, and 70ppm with a sensitivity of 90.62% at the largest and the fastest response time of 8 minutes at a concentration of 70ppm. Moreover the sensor has the fastest recovery time of 8 minutes at a concentration of 10ppm.