A broken mercury-containing thermometer can be toxic if the vapors are inhaled. The risk of poisoning from touching or swallowing mercury from a broken thermometer is low if appropriate clean-up measures are taken.
The volumes of most liquids increase with temperature. The change in the length of the glass tube with variation in temperature is so small that we can ignore that and concentrate on the expansion of the volume of liquid in the bulb. As this volume expands it forces the liquid up into the glass tube.
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.
There may be brain damage. Very large exposures will likely cause death. A large overdose of inorganic mercury may cause massive blood and fluid loss, kidney failure, and likely death. Chronic brain damage from organic mercury poisoning is difficult to treat.
why are glass thermometers rarely used today? it contains mercury, which is a dangerous element. Threat of mercury spills and leak. Then the thermometer can be rotated until the mercury column can be seen inside the glass rod.
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.
California, Connecticut, Illinois, Louisiana, Maine, Massachusetts, Minnesota, New Hampshire, New Jersey, New York, North Carolina, Rhode Island, Vermont, and Washington.
The small silvery ball in a mercury thermometer can be dangerous if the glass breaks and the mercury is not cleaned up properly. The mercury will evaporate and can contaminate the surrounding air and become toxic to humans and wildlife. Each thermometer contains about .
For digital stick thermometers, accuracy is required to ± 0.2°F or 0.1°C (when tested on a water bath), within the range of 98°F and 102.0°F.
Rectal thermometers, which go into your rear end, are the most accurate, but they can be uncomfortable. Armpit, ear, and forehead thermometers aren't as accurate. Most doctors think an oral thermometer, which you hold under your tongue, is best.
Place all materials used with the cleanup, including gloves, in a trash bag. Place all mercury beads and objects into the trash bag. Place the trash bag outside in a secured area and label it as directed by your local health or fire department.
Many can be used on those of people of all ages, but some brands also make thermometers specifically for kids and babies.
- iHealth No-Touch Forehead Thermometer.
- Vicks Comfort Flex Thermometer.
- Chooseen Digital Forehead and Ear Thermometer.
- Boncare Digital Oral Thermometer.
- iProven Medical Digital Ear Thermometer.
In clinical studies between 9 and 23% of repeated measurements using an electronic thermometer differ by 0.5 degrees C or more whilst the corresponding range for mercury thermometers is 0.6%.
The reason: Mercury released into the environment from a broken thermometer is highly poisonous. Pure mercury and its compounds can cause neurological problems and other ailments in people exposed to them. Federal and state authorities have lobbied since 2002 for bans on medical mercury thermometers.
There is a technical reason for using mercury in clinical thermometers. Mercury has a greater coefficient of thermal expansion than alcohol. This means a column of mercury will expand and rise more than a column of alcohol for the same temperature change. As a result, you can get finer readings with mercury.
There is controversy as to whether electronic thermometers offer any real advantages over the traditional mercury-in-glass thermometer. An advantage of the electronic thermometer is its short recording time (Ferguson et al. 1971) compared to the 3 or more minutes needed for the mercury thermometer to register.
Repeat until line is well below 98. 6 Degrees f (37 degrees c). Place thermometer under the tongue for a minimum of 3 minutes. Before storing, wipe clean with cotton ball or gauze square saturated with alcohol.
What is the triple point of water?
- HOW TO CALIBRATE. A THERMOMETER.
- Fill a large container with crushed ice. Add clean tap water until the container is full. Stir the mixture well.
- Thermometers should be calibrated regularly to make sure the readings are correct. The ice-point method is the most widely used method to calibrate a thermometer.
Temperature is a measure of the average kinetic energy of the particles in an object. When temperature increases, the motion of these particles also increases. It's not a terrible definition, but it's not the best either. The temperature is related to the average kinetic energy—not the total kinetic energy.
What are the different types of thermometer?
- Digital thermometers. Digital thermometers are regarded as the fastest and most accurate type of thermometer.
- Electronic ear thermometers.
- Forehead thermometers.
- Plastic strip thermometers.
- Pacifier thermometer.
- Glass and mercury thermometers.
optical pyrometerThermocouple pyrometers measure the output of a thermocouple (q.v.) placed in contact with the hot body; by proper calibration, this output yields temperature. Pyrometers are closely akin to the bolometer and the thermistor and are used in thermometry.
A liquid crystal thermometer, temperature strip or plastic strip thermometer is a type of thermometer that contains heat-sensitive (thermochromic) liquid crystals in a plastic strip that change colour to indicate different temperatures.
Types of thermometer
- Digital thermometers. Digital thermometers are quick to use, reasonably accurate and can be used under the armpit (always use the thermometer under the armpit with children under 5).
- Ear (or tympanic) thermometers.
- Infared thermometers.
- Strip-type thermometers.
- Mercury thermometers.
Since there is a linear relationship between the temperature and the height of the liquid, the divisions between 0 degree and 100 degree can be equally spaced. With a calibrated thermometer, accurate measurements can be made of the temperature of any object within the temperature range for which it has been calibrated.
Each float carries a tag indicating the temperature at which it sinks. Temperature is indicated by the float with the lowest marked temperature which is floating. Concepts Demonstrated: The temperature dependence of fluid density as a thermometric property.
For digital thermometers:Test every six months or so (depending on frequency of use) to make sure the thermometer works properly, using either the ice water or boiling water method. Many digital thermometers have reset buttons. If the accuracy is off, adjust the thermometer to the proper temperature using this button.
The alcohol thermometer or spirit thermometer is an alternative to the mercury-in-glass thermometer and has similar functions. Unlike the mercury-in-glass thermometer, the contents of an alcohol thermometer are less toxic and will evaporate quickly.
If you do not have a thermometerTouch your chest and back. If they feel hotter than usual, you may have a high temperature. You may also have other symptoms such as feeling shivery (chills). Touching your forehead is not a very accurate way of checking your temperature.
Mercury is a very toxic or poisonous substance that people can be exposed to in several ways. If it is swallowed, like from a broken thermometer, it mostly passes through your body and very little is absorbed. If you touch it, a small amount may pass through your skin, but not usually enough to harm you.
