1. The thermometer should be washed before and after use by an antiseptic solution
  2. Mercury level should be below 35° before use.
  3. Read the thermometer keeping the level of mercury along the line of sight .
  4. Don't hold the thermometer by the bulb while reading it.
  5. Handle with care . If it hits against some hard object, it can break.
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Maninder Singh

CA Maninder Singh is a Chartered Accountant for the past 14 years and a teacher from the past 18 years. He teaches Science, Economics, Accounting and English at Teachoo