Can A Thermistor Be Used As A Thermometer?

Method

The variable we will be changing is the water temperature this will change the temperature of the thermistor which in turn will change the amount of resistance the thermistor presents.And all other variables, such as amount of batteries, will be kept the same.

Our method, based on our research, is as follows:

1. Set up the equipment as shown in the below diagram;
2. We will heat the water to 100°Celsius
3. Take the Voltmeter reading
4. Take the Ammeter reading
5. Then we will divide the Voltmeter reading by the Ammeter reading and this shall give us the resistance.
6. We will do this every time the temperature drops by 10°Celsius and record our findings in a table, which will later be used to plot a graph.
7. When the temperature reaches the room temperature (22°) we will put ice in to the water until it reaches 0°
8. Then repeat steps 3, 4, 5 and 6 but instead of when the temp drops 10°C we will take the temp every 10°C it rises

Safety Issues

We will have to keep safe when handling hot water so we are going to reduce the risk of harm by wearing gloves and safety goggles.

We will also tie our shoelaces tight so they will not come undone and trip us over.

We will make sure we will leave the hot equipment to stand before handling again. 

We shall check the lab and our equipment for insects, which could be harmed during this experiment.

We will also tie our hair back so not to get it caught on fire.

                                                Diagram:

Equipment

Voltmeter

Wires

Ammeter

Goggles

Gloves

Bunsen burner

Gauze

Tripod

Heatproof mat

Thermistor

Thermometer

Beaker

Batteries

Crocodile clips