The temperature sensor output 485 several ways of communication

The temperature sensor is often used in all walks of life, but the traditional temperature sensor is output or 4 - resistance 20ma，0- 5 v analog output, but with the popularity of computer, most of the time required to provide temperature sensor with communication, general requirement is 485 communication of temperature sensor, the temperature sensor output 485 what are two ways of communication?

traditional analog output of temperature sensor is made of very good, in order to get before the 485 communications are generally contact with special communication instrument 485 signal to output, the advantage of this approach is to implement more convenient, simple operation, and the overall price is cheap, but the downside is an instrument must match, as space is large, the installation is not flexible, within the limited space to use more troublesome, and inconvenient integration.

with the development of sensor technology, now more and more manufacturers produce the built-in 485 output of temperature sensor, the sensor can not can be directly output 485 signals with the help of instrument, and some manufacturers have is very small, can put the sensor do minimum can do a few centimeters multiplied by the appearance of a few centimeters, this kind of sensor is generally 5 line output, respectively is the power of plus or minus, signal plus or minus and ground.

is very convenient to install the sensor, and it's easy to integration, the five core thread can be integrated the last dozens or even hundreds of temperature sensor is connected to the 485 turn 232 interface, and finally cooperate with computer software, display and record the data on the computer, thus for further processing.

but the manufacturer of the sensors can produce currently is not a lot, so the price is quite expensive, if you need to 485 the number of temperature sensor output, less space there is no limit or recommended to meter output signal, 485 number, the limited installation space, used in production of high-end occasions can choose factory built in 485 output of temperature sensor.

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key words: thermal resistance, thermocouple, thermal resistance, platinum resistance, PT100, PT1000, pressure sensor and digital temperature sensor