AN-202A is a wireless pressure alarm independently developed by Weichuan Technology based on the standard LoRaWAN protocol. The product consists of two parts: a data acquisition box and a pressure sensor. The pressure sensor is selected as a resistive pressure sensor with high stability and reliability. It is packaged using low-pressure injection molding technology, and its overall performance is very stable and reliable. The pressure measurement range is between 0-10KPa... 100Mpa, with an accuracy of ± 0.5% FS. The range and cable length can be customized according to customer needs; The data acquisition box is equipped with a LoRa module and a large capacity battery, coupled with an external omnidirectional antenna, which can better transmit and receive LoRa wireless signals and improve signal transmission distance. AN-202A adopts a low-power integrated design, with a device working life and service cycle of more than three years, and a significantly reduced frequency of battery replacement; The shell is designed with nylon and fiberglass material, which is sturdy and durable, supporting IP67 protection level, and can be used in harsh environmental conditions. Widely applicable for fluid pressure detection in industries such as property fire protection, urban water supply and drainage, petroleum, chemical, power, hydrology, geology, etc.