Mercury Thermometer

General Purpose Thermometers are made from the highest quality glass that has been specially selected to have uniform capillary bore and to be free from strain. Instruments are scientifically annealed and artificially aged before testing to ensure stability and maintain accuracy. Top expansion chambers are provided where necessary to allow for overheating. Triple distilled Mercury Thermometers pressurised nitrogen gas above the column to ensure reliable readings at the lowest temperatures on the scale. Each instrument is fitted with an anti roll cap and packed in a protective plastic container.