The AMT/YP-LHY oil six in one sensor adopts piezoelectric resonant MEMS components and polymer thin film capacitive sensing technology. Through an internally integrated high-precision signal acquisition and processing unit, combined with advanced algorithms, it can automatically detect six indicators of liquid temperature, dynamic viscosity, density, dielectric constant, water activity, and water content in real time. It is applied to hydraulic systems, gearboxes, diesel units, turbine units, air compressors and other equipment, suitable for various oil products such as hydraulic oil, gear oil, transformer oil, turbine oil, diesel engine oil, aviation fuel, kerosene, gasoline, etc.