Learning Resources Boiling Point Thermometers (Set of 10).This set of classroom thermometers is perfect for exploring boiling points of liquids.Thermometers measure temperatures from -30c to 120c, and from -22F to 240F.These boiling point thermometers are mercury free and perfectly safe for primary learners to use.Thermometers measure 2.5cm x 17.78cm.Suitable for ages 8+.