MEMS gas sensors, with the advantages of miniaturization, low power consumption and easy integration, are attractive for electronic noses (E-noses) systems. Here, programmable electrohydrodynamic jet printing is presented to direct deposit colloidal tungsten oxide (WO₃) nanocrystal onto MEMS micro-hot plate platform without any mask. The sensors is tested for their ability to distinguish three different gases (NO₂, H₂S and ethanol), and the sensor is selective and sensitive toward NO₂ gas, with a response of 210 towards 10 ppm NO₂ at 120 °C. The results of this paper pave the way to a useful strategy for making low cost, high performance metal oxide-based E-nose chips.