Mercury thermometers are some of the most common types of thermometers used when taking temperatures. These traditional thermometers require skill and patience when using them. However, with a little bit of know-how, using a mercury thermometer can become quite easy.
What is a Mercury Thermometer?
A mercury thermometer is an instrument that measures temperature by determining how much the volume of liquid contained inside its glass tube changes as the temperature changes. In general, it consists of three parts: the bulb containing mercury, which expands when heated; the capillary tube with markings on it denoting various temperatures; and a stopper at one end with either or both adjusting screws to control zero marks.
Precautions To Take Before Using A Mercury Thermometer
Before using your mercury thermometer, ensure that it’s clean and dry. Any substance stuck to its inner-capillary walls could pose issues in thermal measurements because they act like insulators slowing down heat transfer from what you’re measuring hence giving inaccurate readings.
You should disinfect your hands before handling it to reduce chances of contamination or infection transmission beforehand- this will also prolong their lifespan.
Furthermore, do not sterilize your thermometer in boiling water as this will cause damage to protective coatings surrounding tubes placing you at risk for poisoning through absorption into tissues subjected under contact with mercurial fumes ; always soak them overnight in disinfectant solutions after each use instead.
Cleaning Your Mercury Thermometer
Cleaning should be done carefully so as not to break the thermometer:
Avoid rinsing – don’t rinse your thermometer directly with tap-water under pressure because applying great force may break glass bulbs/ tubes leading spots where calibration gets distorted disallowing accurate reading from then onward.
Use alcohol – Wipe off any bodily fluid and dirt with a cotton ball soaked in rubbing alcohol.
Air-dry mercury – allow your thermometer to dry naturally after using an alcohol-soaked cotton ball.
Taking Temperature Using A Mercury Thermometer
Here’s a simple guide for taking temperatures using your mercury thermometer:
Position Yourself – Place the end of the glass-mercury bulb onto whichever surface you’re measuring from so that it can adjust to room temperature beforehand; having windows open this time gives more accurate readings minus drafts & cross-winds interference.
Shake – Ensure that any separated mercury returns towards the bulb area by forcefully tapping one end against your open palm: this will make it easier to read measurements on the scale once done since fallouts shall not have occurred hindering interpretation later on.
Insertion Point – Locate one of two brightly coloured marks on the capillary tube, indicated as ‘0C’/’C̊F, ‘ then align it above where mercury rests plus gently insert thermometer inside until glass stops wrist/ hand-touching external surfaces, hold steady while waiting around three minutes before reading results.
Reading Results – After waiting for approximately three minutes, tilt your head downwards & hold thermometer up towards bright light such as sun rays reflected indirectly if possible , searching for a thin column within sealed glass tubes visible going across device viewpoints from edge center aligned between each inequality mark; depending upon specific model variations determines what kind + number fractional increments get recorded starting at their favourite pairings combination either Celsius/Fahrenheit giving precise information concerning temperature variance measured indoors/outside near human activity regions generally used for testing surrounding air water/solids liquids gases/vapours flora/fauna.
Is a digital thermometer better than a mercury thermometer?
Digital thermometers are definitely looking sweet haha! They provide quick results and are easily readable. However, mercury thermometers are still preferred when taking temperature readings that require high levels of accuracy.
What is the most accurate way to use a mercury thermometer?
The most accurate way to take a reading using your mercury thermometer involves waiting for approximately three minutes after positioning it at room temperature and shaking forcefully so any separated liquid inside the solution returns towards its bulb area before gently inserting into whatever measurement device necessary. Ensure no environmental factors such as drafts or brisk winds affect calibration during this stage affecting results visible upon reading measured values next time you intend using your thermometer.
Mercury thermometers may not be as modern as digital ones but have their own benefits for those who need more precise measurements in various areas. By following these instructions carefully, you can achieve accurate results using them every time!