Exploring Our Fluid Earth

Puncture risk if glass thermometer breaks. Home body temperature thermometers from local drugstores could work. Cheap ~$5 each. However, most only go 32-43 deg C though and many are Fahrenheit only in the US. Kitchen meat thermometers could also work. Analog models are cheap at commercial restaurant supply stores. But they can be difficult to read (and quickly at 10 s intervals). Digital meat thermometers are $10-25 range in online retail stores.