Old School Challenge: Make your own thermometer

Investigators often refer to temperature changes to look for fluctuations within the environment around us as they believe a dramatic change could indicate a spirit manifesting. Here is how you can make your own non electronic device to detect these temperature changes in this new Old School Challenge.
Sarah Chumacero
8th September 2019.
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Old School Challenge, General.
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Cold spots, hot spots, temperature changes are quite common discussion amongst paranormal investigators. It seems to be the general theory that spirits create what are referred to as cold spots. While there are a lot of natural explanations for this which you can find in my article: Cold Spots and the paranormal, people still record tempertature and more important temperature changes within the environment to see if there are any large fluctations around the same time that unusual activity occurs.

In modern day paranormal investigation, people traditionally use a laser IR temperature gun. The problem with this is that the laser has to hit an end point which means it measures the surface and not 'a mist of air' which is really what we would assume a cold spot to be. Data loggers and Mel Meters seem to be a better fit to measure this kind of phenomena. If your pockets are deep enough, you may even use a thermal camera to get a visual on where these cold spots may be and where they are coming from. But what did investigators use to do before these were invented? In some cases, people would carry around cheap thermometers you would buy from the store which are filled with mercury. Mercury itself can be quite dangerous, especially if the thermometer were to break as they are made of glass. People instead would use an alcohol based thermometer which ironically was called a 'spirit thermometer' as the alcohol was thought to be less toxic and dangerous should the thermometer break. So for this old school challenge we will make an appropriately named spirit thermometer.

How does a thermometer work?

A thermometer consists of a glass tube which is sealed at both ends. It is partly filled with either a mercury or alcohol based solution. At the surrounding temperature around the bulb heats up, this heat causes the liquid inside to expand and rise up inside the thermometer. The glass tube is typically mounted on a piece of board or it has numbers printed on the tube itself which indicate the actual temperature. In simple terms, the hotter the surroundings, the more the liquid will expand and rise. As it gets colder, the liquid shrinks. While it is too difficult for us to make a proper thermometer that will accurately read the current temperature, the point of this exercise is more to detect a significant change in temperature and that is the kind of thermometer we will be making.

How to make a 'spirit' thermometer

(That is what it is actually called because of the alcohol component!)

Equipment you will need:

  1. Pour equal amounts of tap water and rubbing alcohol into the bottle until it's around 1/4 full.
  2. Add a few drops of the food colouring of your choice, and shake the bottle to mix it. Red is usually the colour of choice but it can be anything you want!
  3. Insert the straw into the bottle, not letting it sink to the bottom.
  4. Wrap modeling clay around part of the straw and the opening of the bottle to make it stay. It is important to let part of the straw stick out of the bottle. The clay should be tight around the straw and cover the bottle mouth, but leave the top opening of the straw uncovered.

Using a Black marker, draw a line which will be your baseline point. This baseline point allows you to see if there have been any changes. For this reason, a whiteboard marker is ideal as it means you will be able to change your baselines every time you go into a new area. While this won't tell you what the actual temperature, it will show you if there have been any significant increases or decreases in temperature.

Image Source: Scientific American

This method is not as fast as a Mercury thermometer and yes it has it flaws, but this is how an investigator may have done these measurements in the past. This is better left stationary in a room and is not really for walking around. Investigations were a lot different before technology was invented and a lot of the technique involved was 'locking' down a room! Technology has advanced since then and of course we now have devices like Mel Meters which can do this much easily. If anything this is more just a fun exercise to try and would be interesting to measure against an actual thermometer and against any digital devices you are using the measure the information as well to see how well they marry up!

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