A Figaro TGS 2620 sensor was used to detect organic solvent vapours. This sensor
can detect alcohol vapour as well as solvents such as those used in cleaning
products. This sensor is also sensitive to a number combustible gases including
carbon monoxide, which makes it suitable for general purpose pollution sensor.
The operation of this sensor does not require pre-heating or cooling period,
which means it can be done with a simple electrical circuit.
Figure 3.10 shows this sensor.
Solvent Vapour sensor.