safe thermometer / thermometer

In our daily life, the mercury thermometer can be broken easily. Then mercury
is harmful for people and environment . So the solution is well known — cover the mercury by the powder of sulfur and then clean the reactant，HgS (one combination is a dark red，nontoxic and Chemical stable solid)
However, the powder of sulfur is not a normal thing.So it can’t be stored in ordinary family
Safe thermometer is a product that it combines powder of sulfur and mercury thermometer to avoid the situation that mercury can not be cleaned in time