Is the pen type thermometer 100% mercury free?

Yes, our thermometers are free of mercury. But please note that even "mercury free" batteries contain a minimum quantity of mercury! 100% mercury free round cell batteries do not exist.

So we can state in general: "Our thermometers are mercury free". But please note that this is based on "mercury free" batteries we are using and which are in fact just 99.9%, not 100%, mercury free!

The minimum of remaining mercury is located in the housing (not in the electrolyte) of the round cells.