Principle of temperature and humidity transmitter

Temperature and humidity transmitters mostly use temperature and humidity integrated probes as temperature measurement components, collect temperature and humidity signals, and undergo voltage stabilization filtering, operational amplification, non-linear correction, V/I conversion, constant current and reverse protection, etc. After the Circuit is processed, it is converted into a current signal or voltage signal output in a linear relationship with temperature and humidity, or it can be directly output through the main control chip for 485 or 232 interface.

contents

  • 1. The principle of temperature and humidity transmitter
  • 2. Wiring diagram of temperature and humidity transmitter
  • 3. The role of temperature and humidity transmitter

1. The principle of temperature and humidity transmitter

The temperature current transmitter converts the signal of the temperature sensor into a current signal, and then connects it to the secondary instrument, so that the corresponding temperature can be displayed. For example, the model of the temperature sensor in the picture is PT100, then the function of the temperature current transmitter is to convert the resistance signal into a current signal, input it to the meter, and display the temperature.

Principle of temperature and humidity transmitter

2. Wiring diagram of temperature and humidity transmitter

Related features are mainly manifested in the full-scale analog output linearity, long service life, and good consistency. Wide range, high accuracy, good stability, small annual drift, fast response, small temperature coefficient, and good interchangeability. Normally, the working temperature is minus 20 degrees Celsius to 60 degrees Celsius.

Principle of temperature and humidity transmitter

3. The role of temperature and humidity transmitter

The temperature and humidity transmitter is a transmitter device equipped with humidity and heat sensitive components that can be used to measure temperature and humidity, some with on-site display, and some without on-site display. Temperature and humidity transmitters are widely used in various fields of production and life due to their small size, stable performance, and high accuracy.

The function is to collect the temperature and humidity signals, and convert them into a current that has a linear relationship with temperature and humidity after being processed by Circuits such as voltage stabilization filtering, operational amplification, nonlinear correction, V/I conversion, constant current and reverse protection. The signal or voltage signal output can also be directly output through the main control chip for 485 or 232 interface.

Principle of temperature and humidity transmitter