T.7(1) – Galileo Galilei Thermometer
This Galileo liquid thermometer, invented by Galileo Galilei, shows the room temperature. The balls inside the liquid Galileo thermometer are calibrated to their weight and contains non-hazardous liquid. Depending on the temperature change, the balls in the Galileo liquid thermometer ascend and descend. It has a minimum temperature for raising the balls.
T.7(2) – Infrared Thermometer
An infrared thermometer is a thermometer which infers temperature from a portion of the thermal radiation sometimes called blackbody radiation emitted by the object being measured. Measures temperature from -30 to +500 degrees C (-20 to +932 degrees F) with an accuracy of + or – 1.5 degree C.