| Thermometers can be helpful for a number of | | | | but lower than the lowest bubble on the bottom. |
| reasons; from cooking, to determining the | | | | Additionally in the sixteenth century it was |
| weather and even for scientific purposes. | | | | discovered that certain substances, like alcohol |
| Thermometers need to be simple and easy to | | | | and mercury, would expand in higher |
| use and people often choose to purchase | | | | temperatures. This was utilized to create the |
| thermometers free of wires or other extras that | | | | traditional bulb and mercury style thermometer. It |
| can get in the way. Contrary to popular belief, | | | | was discovered that if an air tight tube was |
| wireless thermometers are not a new invention; | | | | created that contained only mercury the mercury |
| the first thermometer ever invented was | | | | would expand and rise farther up the tube as the |
| wireless! In fact it was only after electricity was | | | | temperature increased. This new invention proved |
| invented that thermometers were made to | | | | to be more accurate than the previously designed |
| incorporate wires to help them function. However | | | | thermometer because it was not susceptible to |
| thermometers were designed to function without | | | | change with air pressure and depended only on |
| electricity and even now most thermometers are | | | | temperature. Over centuries this type of wireless |
| wireless. Spring thermometers, traditional mercury | | | | thermometer was perfected and is currently used |
| thermometers and even infrared thermometers | | | | all over the world. |
| are all wireless. | | | | Another type of wireless thermometer was |
| The first thermometer was invented in the early | | | | constructed in the nineteenth century based on a |
| sixteenth century; and it was established on the | | | | similar idea as the mercury thermometer. It was |
| principal that air expands and contracts based on | | | | discovered that like mercury, some metals are |
| its temperature. It was discovered that if many | | | | extremely sensitive to heat and as the air warms |
| glass bubbles were filled with water and air in | | | | it will expand. Spring thermometers rely upon the |
| different amounts, they would each represent a | | | | expansion of metal to determine the temperature. |
| different temperature. The wireless thermometer | | | | Most commonly spring thermometers look like |
| was compiled of a single glass tube that was filled | | | | clocks, but instead of displaying time the face |
| with water as well as multiple glass bubbles full of | | | | displayed temperature. As the heat rises the |
| different combinations of air and water. As the | | | | metal in the internal spring will expand pushing the |
| temperature of the outer glass would rise and fall | | | | hand of the dial outward. Temperature is |
| the bubbles inside the glass would shift. All bubbles | | | | determined based of the location of the hand on |
| designed to represent temperatures lower than | | | | the face of the thermometer and the |
| the actual temperature would float to the top, | | | | temperature it is displayed closest to. These |
| leaving the bubbles representing higher | | | | types of thermometers are typically the least |
| temperatures at the bottom. Through this | | | | when compared to other wireless types of |
| separation one could see that the temperature | | | | thermometers. |
| was higher than the top bubble on the bottom | | | | |