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How to wire 485 and analog sensors? RS485 remote temp and humidity sensor has two-wire and four-wire connections. The four-wire system can only achieve point-to-point communication, which is rarely used now. Nowadays, the two-wire connection method is mostly used. This wiring method is a bus topology. Up to 32 nodes can be connected on the […]

An automatic weather station is an information detection device that can convert the detected measurement information into electrical signals or other signals according to certain rules, and output them in the required form to meet the requirements of information transmission, processing, and storage. This article mainly introduces portable weather station and agricultural weather station. 1.The

The smoke alarm can accurately sense the smoke generated by the fire in the initial stage of the fire, and quickly alarm people. Smoke alarm classification Classification by principle Ion smoke detector The working principle of the ionic smoke alarm is that the radioactive source in the ionization chamber is Am241 and the positive and

The illumination intensity is abbreviated as illuminance, which is a physical term that refers to the luminous flux of visible light received per unit area. The unit of illumination is Lux (Lux or lx). Illuminance is the amount of illumination on the surface of an object. Plant growth is achieved by storing organic matter through

IoT is based on sensors and is an extension of the Internet. It connects all items with the network through sensors, achieving the purpose of facilitating the identification, management, and control, and also improving the way of interaction between people and everything. What is the role of sensor? As the “perception layer” of the Internet

PM2.5 refers to solid particles and liquid droplets with an aerodynamic diameter less than or equal to 2.5 microns in ambient air. It has a small particle size and is rich in a lot of toxic and harmful substances. It has a longer residence time in the atmosphere and a longer transportation distance than atmospheric

Table of Contents A sensor is a device that can sense the measured information and transform it into an electrical signal or other required forms of information output according to a certain rule to meet the requirements of information transmission, processing, storage, display, recording, and control. With the development of the Internet of Things technology,

Rain gauge is a professional instrument for measuring precipitation in a certain area over a period of time. The more common ones are siphon, tipping bucket, optical rain gauge, weighing rain gauge, etc. The tipping bucket rain gauge is most commonly used in meteorological monitoring. The tipping bucket rain gauge is composed of measuring parts