JWA2-M micro moisture sensor can quickly and accurately detect oil water activity (moisture saturation) and temperature by using front-end sensitive moisture sensing devices. The moisture content model database of the data processor can convert water saturation into the general moisture content PPM value of oil detection. The sensor has built-in moisture saturation curves of hundreds of oil products. The user can switch freely according to the communication protocol, and the system compensation model independently developed by the company makes the sensor adapt to various complex environments with harsh conditions; Combined with the system data processing system, it is a sharp tool for detecting dissolved water in oil products.