Question

120 100 80 60 운 40 20 700 600 500 0 400 300 200 100 0 Time (seconds) Inside1 Outside1 Inside2 Outside2

1) Analysing the results from the graph of resistance vs time when the sensor was exposed to vinegar, does the polyaniline sensor adequately perform its function as a sensor? If so, then list a potential application of such a sensor.

2)How might you improve the sensor? For this question think first about what a good sensor should then address how the sensor made here could be made better in that context. Do not simply say that being more careful or getting a more experienced scientist to do the experiment is the way to improve it.

Answer 1

1. the detector is RESISTANCE THERMOMETER DETECTOR as per the graph says. The potential application of polyaniline sensor are in manufacturing printed circuit boards, gas sensing, in N doped materials as sensors, pH sensors etc., and if talking about the RESISTANCE THERMOMETER DETECTOR its replacing slowly the THERMOCOUPLES in industries below the temperature 600 degree celsius. the RTD sensors can be improved by calibrating it properly, by getting digital signals so that things become watery clear ,

2. sensors can be said that they are device which can sense the changes or which will be providing suitable and useful output in response to a physical quantity in form of energy. it has physical packing and external connections. Sensors can also be called TRANSDUCERS. Always used with other electronics. A routine example can be THERMOMETER'S MERCURY 's movement with temperature rise in our body.

A Good sensor must have High sensitivity for sure, no disturbance regarding noise or anything, linearity should be there, it should consume less power or energy, it must have High Resolution.