Where are mercury thermometers used?

Where are mercury thermometers used?

Best used to measure high temperatures, mercury thermometers are still widely used in meteorology and in high temperature places such as autoclaves, which are high-pressure vessels used to sterilize or process equipment.

Why did they stop using mercury in thermometers?

The reason: Mercury released into the environment from a broken thermometer is highly poisonous. So government and state agencies have mounted campaigns to end the use of thermometers that contain the liquid metal. Federal and state authorities have lobbied since 2002 for bans on medical mercury thermometers.

Are mercury thermometers better?

But mercury thermometers also have real advantages over the alternatives. They’re often cheaper and more accurate, especially at higher temperatures. And unlike one common alternative, electronic thermometers, they’re self-contained (no wires sticking out) and require no power.

What are the three advantages of using mercury in thermometer?

It does not stick to the glass tube. It expands on providing heat to it. It has lower freezing point and higher boiling point. It is a shining metal and when it expands, the expansion can be easily seen.

Is a mercury thermometer the most accurate?

Friend: Of course, a mercury thermometer is more accurate. Hospitals use mercury ones. When used correctly, the digital thermometer is accurate enough to meet daily needs and safer than the mercury thermometer.

Are mercury thermometers more accurate than alcohol?

It is more durable than alcohol thermometer because mercury does not evaporate easily. It is smaller in size as compared to alcohol one. Mercury does not wet the wall of the thermometer, which means that results can be highly accurate.

How long do you keep a mercury thermometer under your tongue?

After shaking the mercury down, place the thermometer under the child’s tongue, with the bulb toward the back of the mouth. Tell your child to keep the lips firmly closed, but not to bite the thermometer. 3. Leave the thermometer in place for 3 minutes.

What is the importance of thermometer?

A thermometer is an instrument that measures temperature. It can measure the temperature of a solid such as food, a liquid such as water, or a gas such as air. The three most common units of measurement for temperature are Celsius, Fahrenheit, and kelvin.

What are the advantages and disadvantages of mercury thermometer?

A thermometer comparison

advantages	disadvantages
Mercury thermometer
cheap	display is harder to read
durable	does not work below -39 C (Hg freezing pount)
accurate	cannot be used for thermograph

What does mercury do in a thermometer?

In a mercury thermometer, a glass tube is filled with mercury and a standard temperature scale is marked on the tube. With changes in temperature, the mercury expands and contracts, and the temperature can be read from the scale. Mercury thermometers can be used to determine body, liquid, and vapor temperature.

Why is alcohol used in a thermometer?

Alcohol thermometer uses alcohol as the liquid to measure the temperature variations. Alcohol expands when it absorbs temperature and contract in colder temperatures. Most commonly used alcohol in these is ethanol, but different types of alcohols can be used depending on the measured temperature and environment in which the measurements are taken.

Do candy thermometers contain mercury?

A candy thermometer is a type of large, glass mercury thermometer that measures candy syrups during cooking. It does for sugar what a meat thermometer does for meats, with the only difference being that the candy thermometer can read higher levels of temperature.

Is alcohol in thermometer?

Alcohol thermometer is a type of thermometer that uses a bulb filled with alcohol as the temperature sensor. The liquid inside the bulb can be pure ethanol, toluene , kerosene or any other suitable component depending on the application.