A zipper pull with a built-in thermometer. Although not suitable for gathering scientific data, it's perfect for measuring extremes in temperature and reporting to relatives on the other side of the country.
|Ideal for||Camping and hiking|
Alcohol thermometers are safer than mercury thermometers, however they are slightly less precise and there is a risk of alcohol evaporation. Digital thermometers use thermistors to determine temperature.
|Temperature range||- 30 to +50°C|
The thermometer can be calibrated to adjust to any suspected inaccuracies.