RS485 hydrogen fluoride (HF) sensor is a wired industrial sensor developed based on RS485 bus technology, with built-in hydrogen fluoride sensor and temperature and humidity sensors. It utilizes electrochemical principles to monitor the concentration, temperature, and humidity of hydrogen fluoride in the environment in real-time. This system has the characteristics of high detection accuracy, stable performance, and reliable wired transmission, and is widely used in environmental monitoring, industrial emission monitoring, chemical plants, and other fields.