Glass mercury thermometers are no longer recommended and can be dangerous . There are serious health risks if a glass mercury thermometer breaks. Mercury is toxic if inhaled or if the liquid touches the skin. There are two kinds of glass thermometers, one with mercury and one without mercury.
Why are glass thermometers rarely used today?
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.
Why are glass thermometers not recommended?
Liquid in glass thermometers tend to be fragile and hence easily broken, can only be used where the liquid column is visible, cannot be used for surface temperature measurements, cannot be read from a distance and are unsuitable for high temperature measurements.
Are glass thermometers illegal?
As of 2012, many mercury-in-glass thermometers are used in meteorology; however, they are becoming increasingly rare for other uses, as many countries banned them for medical use due to the toxicity of mercury .
Are glass mercury thermometers accurate?
The accuracy of a typical glass thermometer is ±1 scale division . These are available in partial immersion or total immersion types and typically have to be considerably longer to achieve the same specifications as a mercury thermometer.
Which thermometer is the most accurate for adults?
Digital thermometers are the most accurate way to take body temperature. There are many types, including oral, rectal, and forehead, plus many that are multifunctional. Once you decide on the type of thermometer you want, you can think about design, extra features, and price.
What is the most reliable thermometer?
- iProven DMT-489. Best thermometer overall. ...
- Innovo Forehead and Ear. Another top dual-mode thermometer. ...
- Vicks ComfortFlex. Best thermometer for infants. ...
- Chooseen Digital Forehead and Ear Thermometer. ...
- Kinsa Smart Ear Thermometer. ...
- Kinsa QuickCare. ...
- Elepho eTherm. ...
- Braun ThermoScan 7.
When using a glass thermometer you should?
Close your lips gently around the thermometer. Do not bite the glass thermometer. Keep the thermometer under your tongue for 3 minutes . Remove the thermometer without touching the tip.
Is 99.1 a fever?
An adult probably has a fever when the temperature is above 99°F to 99.5°F (37.2°C to 37.5°C), depending on the time of day.
What is a normal forehead temperature?
The normal temperature range on the forehead is approximately between 35.4 °C and 37.4 °C .
Do hospitals still use mercury thermometers?
The use of Hg thermometers has been virtually eliminated in routine hospital use , but a wide variety of regulations and test methods in the petroleum industry continue to specify mercury- in-glass thermometers.
How do I know if my thermometer is broken?
- Fill a pot with water, and place the thermometer in the pot. ...
- When the boiling is constant and rolling, make sure it's reading 212°F or 100°C (at sea level).
- Set a timer for five minutes, then check the thermometer again.
Which is better mercury thermometer or digital?
1. Digital thermometers provide faster results. Digital thermometers provide fast results as opposed to mercury thermometers whose readings are slower to realize because you have to wait for the mercury to heat and then slowly rise to display the temperature.
How reliable are forehead thermometers?
New research shows that forehead temps may also be accurate under 3 months of age . Age 3 months to 4 years old. Rectal or forehead temps are accurate. An ear thermometer can be used after 6 months old.
How do I know if my mercury thermometer is working?
- If there is no liquid in your thermometer, for example, if it uses a metallic strip or coil to measure temperature (like most meat thermometers do), it is not a mercury thermometer.
- If the liquid in the thermometer bulb is any color other than silver, it is not a mercury thermometer.
Are glass or digital thermometers more accurate?
Both laboratory and clinical studies show that there is no significant difference in the average accuracy of the two types of thermometers, however there is a greater fluctuation of readings of temperature when using electronic thermometers.
