The internal flow transducer contains two sensors, a flow sensor and the other to measure the
temperature.
Each sensor has a nonlinear output voltage independent. To determine the mass flow of gas
passing through the transducer, the output voltage of each sensor is measured.
A microprocessor processes the results and calculates the flow using a specific algorithm.
The circuit measures the flow is generally known as a thermal sensor or hot wire anemometer.
This flow transducer uses a heated wire sensor and maintained at a temperature of 150 ° C.
The gas velocity through the sensor determines the heat transfer rate between the gas and
sensor.
This heat transfer rate is translated into a voltage required to maintain the temperature at 150 °
C.
Therefore, this voltage is a function of mass flow of gas through the sensor.
The heat transfer rate is also influenced by gas temperature.
A thermistor circuit is used to measure the gas temperature and a correction is made also
through specific algorithm.
To Next Page
Loading...
