Hydrometers are used to measure the alcoholic strengths / content of spirits or beer, based on the percentage of alcohol by volume at 20°C (70°F). Hydrometers are manufactured in accordance with government guidelines and must be re-certified every 5 years. Certification is approximately $25 per instrument and is billed directly by a government inspection facility to the end user. For further details on Hydrometer Certification, contact Canada Customs & Excise Tel # 613-954-8239.
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