Technical data
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The TGS sensor
The TGS sensor contains a semiconductor sensor,
which is constructed on SnO2 -sintered N-substrate.
When combustible or reducing gases are absorbed by the surface of the sensor, the concentration of the test gas is determined by the change in conductivity.
1 = Circuit voltage
2 = Heating voltage
3 = Load resistor
The VQ sensor
The head of the VQ sensor functions on the principle of heat reaction. When combustible or reducing gases or vapours come in contact with the measuring element, they are subjected to catalytic combustion, which causes a rise in temperature. This rise causes a change in the resistance of the measuring element which is used as a measure of the component of gas being tested. The inert element is for compensating the temperature and conductivity of the test gas.