Despite having several laws signed by many nations to restrict the use of chemical warfare agents (CWAs), attempts and attacks using chemical weapons still exist. The use of CWAs in the Tokyo railway and the Syrian civil war has devastated the world with its immense damage or casualties. To prevent such casualties, early detection technology plays a crucial role. Due to strict regulations to prevent the use of CWAs, dimethyl methyl phosphonate (DMMP) was used as a stimulant of CWAs. In this study, a quartz crystal microbalance (QCM) and Surface Acoustic wave (SAW) sensor operating at 5 MHz and 250 MHz respectively are used to evaluate the sensing performance as a sensor. A QCM 200 digital controller (Stanford research system SRS) was used throughout the experiment. The aluminum electrode was deposited onto the SAW sensor by the lift-off process as an IDT electrode on a single-crystal ST-cut quartz substrate. To minimize the electrical noise, the titanium metal layer was used as an adhesion layer between Aluminum and substrate. As a sensing layer, nanostructured composite materials were synthesized by the hydrothermal and thermal reduction process. The synthesized materials were mixed with isopropyl alcohol (IPA) and ultrasonicated for three hours. A calculated amount of mixture is deposited onto the QCM and SAW sensor's surface by the drop coating process. From the experiments, we observed that the four materials show excellent sensitivity and selectivity among all the nanostructured materials. Other influencing factors such as linearity, reproducibility, response/recovery times, and the effect of humidity were also investigated. Comparison of QCM and SAW sensors based on the sensitivity that showed higher sensitivity in the SAW sensor than in the QCM sensor. The QCM digital controller and fabricated SAW sensor showed stable performance in various working conditions. However, long term test and reliability of the sensor for different CWAs is still under investigation.