Excellent for measuring max and min temperatures over several days.
This is the second of these I've bought - I somehow managed to mislay the first! They excel in one particular function - the minimum and maximum values are only reset by pressing the button. Almost every other similar device I've found resets the values every 24 hours. I use them in a long thin canal boat that I like to keep above freezing over the winter, using electric heaters. I only visit every week or two in the winter, so I can check I've got the heater thermostats set correctly by measuring the lowest temperature the furthest point from the heaters gets down to.
Verified purchase: YesCondition: New