As the key innovation enterprise in Shenzhen, TOPOS is one of the few sensors suppliers of the core technology and probe assembler. The key indicators of our types of thermistors and temperature sensors are far ahead in China, can compete with similar foreign products in the global market. Our company has 16 invention patents and 2 undisclosed technologies.

PM2 5 sensor
D7 is a kind of digital and universal pm2 5 particle sensor, which can be used to obtain the number of suspended particles in the air,i.e.the concentration of particles, and output them in the form of a digital interface. This pm2 5 sensor arduino can be inserted into variable instruments related to the concentration of suspended particles in the air or other environmental improvement equipment to provide correct concentration data in time.