I had to monitor my aquarium’s temperature. For the purpose, the idea came to my mind why not use digital table clock that can also display the environment’s temperature. Most of you will have such a clock at home I am sure.
Step 1: What You Will Need:
Step 2: Open the Clock
Unscrew the clock and find out the sensor. The picture below may help you to find it. Or you can touch the component you suspect to be the sensor and see the temperature reading rising on the display. Remove the batteries once you got the clue.