Technology has extended many kinds of human capacity, and the sensor has extended the range of human perception. With the rapid development of modern technology. There is a heavy demand for IoT, big data, cloud computing technology and so on. It is widely applied to economics, the national defense science and technology, the people’s livelihood and any other areas.
And the sensors are divided into the wireless sensor and conventional wired sensor. Conventional wired sensors connect the device that receives input, has the advantage of high accuracy, durable and can be used many times without replacement. The wireless sensor is a wireless data communication collector that integrates the functions of data acquisition, data management and data communication, has the advantage of low-power operation, wireless data transport, no wiring, flexible installation and debugging and so on. The communication protocols are divided into wireless communication protocols and wired communication protocols. The communication protocol defines the format used by the data unit, the information and meaning that the information unit should contain, the connection mode, and the timing when the information is sent and received, to ensure the smooth transfer of data to the determined place. The types of communication protocols have RFID, infrared, ZigBee, Bluetooth, GPRS,4G, wifi and NB-IoT. The communication protocols have MBus, USB, RS232, RS485 and ethernet.
In 1983, based on the RS-422 Industrial Bus standard, the Electronic Industry Association formulated and issued the RS-485 industrial Bus standard. The RS-485 bus-standard specifies standards for the electrical properties of bus interfaces that are defined for the two logical states: The positive level is between +2V ~ +6V, indicating a logical state; A negative level between -2V and -6V indicates another logical state. Digital signal adopts differential transmission mode, which can effectively reduce the interference of noise signal.It can effectively support multiple sub-nodes, communication distance and high sensitivity of information receiving. In industrial communication network, RS – 485 bus is mainly used in general and external information transmission and data exchange, all kinds of industrial equipment with effective for noise suppression capability, efficient data transfer rate and good reliability of data transmission and scalable communication cable length is unmatched by other many industrial communication standards.Therefore, the RS-485 has been widely used in many fields.
Communication protocol of the Hengko temperature and humidity sensor and gas sensor is RS-485. In the temperature and humidity and gas detector, RS-485 bus can transmit information and exchange data directly with the sensor to ensure the data Immediate response and accuracy.
Besides, the gas sensor probe as a measuring element has a great effect on the sensor measuring accuracy. According to the different measuring environment of the sensor, it is very important to choose the probe housing. Such as the stainless steel probe housing has the advantage of high-temperature resistance, anti-corrosion, waterproof, dust removal, is available for high temperature and humidity, large dust and other severe environments.
With the constant development of technology, the requirement of the various sensor has more and more high. HENGKO has more than 10 years of OEM/ODM customized experience and professional co-design and aided design capacity. We have a professional design team the provides technical assistance. We will provide you excellent temperature and humidity sensor/ transmitter/probe, gas sensor/alarm/module/element and so on.
Post time: Oct-31-2020