How much mercury is dangerous thermometer?

How much mercury is dangerous thermometer?

Each thermometer contains about . 5-1.5 grams of mercury. One gram of mercury can contaminate a 20 acre lake, enough to cause a public advisory to be issued on the potential dangers of eating fish caught in that lake. To prevent possible contamination, stop using your mercury thermometer.

Does maximum minimum thermometer have mercury?

Six’s Maximum and Minimum thermometer is a U shaped parallel tube made up of glass. One side registers the maximum temperature and the other side records the minimum temperature. The bend at the bottom of the thermometer contains mercury which moves up or down based on the expansion and contraction of alcohol.

Why mercury is used in maximum thermometer?

Mercury is the only metal that is in liquid state at room temperature. It is used in thermometers because it has a high coefficient of expansion which makes it easy to move in the thermometers as per the temperatures. Mercury has a boiling point which makes it suitable to measure higher temperatures.

What is the maximum range of thermometer?

Registers maximum and minimum temperatures in both °C (range: −40 to 50° with 1° divisions) and °F (range: −40 to 120° with 2° divisions).

Is it dangerous if a mercury thermometer breaks?

Mercury is a shiny, silvery liquid metal that can cause serious health problems. Even the small amount of mercury from a broken thermometer can cause harm, especially to children, unless it is properly cleaned up and removed.

Where is maximum and minimum thermometer used?

Maximum/minimum thermometers are often used to measure a maximum/minimum air temperature for example in a greenhouse. Thus, the transfer liquid should preferably remain substantially liquid up to and above the highest expected temperature.

Can you still buy a mercury thermometer?

While mercury thermometers can measure temperature within one degree Celsius, digital thermometers can be as accurate as 0.001 degrees C a difference of four orders of magnitude in accuracy. This changeover won’t be a big deal for the average person “In fact, you can’t buy [mercury thermometers] anymore,” Strouse said.

What happens if you break a mercury thermometer?

If you break a mercury thermometer or light bulb, a small amount of liquid mercury may spill out. Liquid mercury can separate into small beads, which can roll some distance away. The mercury may also evaporate into vapour. However, this small amount of mercury is extremely unlikely to cause problems for your health.

What is maximum minimum thermometer Class 7?

Class 7 Question There is a special thermometer called maximum minimum thermometer which automatically records the maximum and minimum temperatures of a day. Six’s thermometer is a regisetring thermometer which can record the minimum and maximum temperatures reached over a period of time, for example 24 hours.

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.

What is mercury thermometer used for?

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.

What is Mercury in glass thermometer?

mercury thermometer – thermometer consisting of mercury contained in a bulb at the bottom of a graduated sealed glass capillary tube marked in degrees Celsius or Fahrenheit ; mercury expands with a rise in temperature causing a thin thread of mercury to rise in the tube. mercury-in-glass thermometer.

What is red liquid in thermometer?

“The red liquid inside of a thermometer is alcohol. When the temperature changes, the alcohol expands, providing a reading based on the thermometer’s scale. Red dye is used to color the clear alcohol so that someone is able to easily read the thermometer.”. As mentioned, mercury is no longer used in domestic thermometers.