Thermometer and monitoring board
In order to adjust a central heating and save energy, room temperatures must be measured with a thermometer.
The thermometer was invented in the 17th century and its working principle is still used today. Household thermometers contain, inside a glass tube, a small amount of coloured alcohol which expands when heated and moves up by capillary. The liquid used previously was mercury, but it was considered too toxic. There are also other technologies to measure temperatures like bimetal thermometers (e.g. oven thermometers) or electronic devices.
To demonstrate how a standard thermometer works, it is possible to build a simple model with a jar filled with coloured water and a straw. This project is not very precise, but it can be calibrated to create a temperature scale.
For accurate measurements, it is better to use a standard household thermometer. The evolution of temperatures can be reported on a monitoring board.
This project is in two parts
We propose to build first a very simple thermometer. It doesn't make very reliable measurements but is a good way to ...A. Construction of the thermometer
With a punch, make a hole in the center of the jar lid until you get a hole matching exactly the diameter of the straw. Screw the lid back on and insert the straw through the hole in the center of the jar. With hot glue, seal the edge of the ... Unscrew the lid and fill 3/4 of the jar with water. Add a few drops of food colouring (e.g., red) and mix the liquid. ... Check if the lid is well fastened. Blow into the straw and then release the pressure. Coloured water should move up in ... Check if the thermometer works by taking the jar between your hands. Your body heat will warm the jar and its content ... Calibrate your home made device with a household thermometer. To mark the scale, slide a sheet of bristol board with 4 ...B. Construction of a monitoring board
Download and photocopy the template. Write down week days and temperatures. Cover the monitoring A4 sheet with transparent self-adhesive plastic roll. Fix the monitoring sheet with white ... Glue two picture hooks on the top back of the monitoring panel and connect them with a string. Fix the male velcro at the ...| Date | 02.05.2013 |
| Auteur | Martin |
| Organisme | info-energie |
| Traducteur | Martin |
| Finalité | Mesurer |
| Domaine | Energie Développement durable Autres |
| Langue(s) | français english deutsch |
| License |  |
