What is temperature

How does a Class 7 clinical thermometer measure temperature?

Place the bulb of the thermometer under the tongue. Wait for one minute, take the thermometer out and note the reading keeping the level of mercury along the line of sight . This reading gives the exact body temperature. It is necessary to state the temperature with its unit denoted by °C.

It is a device that is used to measure the temperature or temperature gradient (the degree of hotness or coldness of the object). Thermometer. There are various kinds of thermometers. Some of them are like glass tubes that looks thin and filled with some kind of liquid.

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.

Types of Thermometer

What is in digital thermometer?

Digital Thermometers are mercury free. These thermometers contain thermistor inside the tip which is used to measure the temperature. They provide quick and highly accurate results over the body temperature range. These thermometers are easy to read with LCD display on them.

Digital thermometers are an advance to the existing clinical thermometers ; Due to high toxicity of the Mercury present in clinical thermometers and difficulty in its disposal in cases when the thermometer breaks digital thermometers are manufactured that can measure the accurate temperature without the use of mercury.

Digital thermometers use a computer chip/heat sensor to tell the temperature instead of mercury . The body whose temperature is to be measured is brought in contact with the thermometer and it recieves heat until it comes at a temperature equal to the temperature of the hot body.Jul 21, 2016

Digital Thermometers A digital thermometer is used to verify a smart temperature transmitter under flowing conditions and a successful calibration of the smart temperature transmitter . Portable electronic thermometers (PETs) are designed to measure temperature in a RTD-type thermowell using a thermistor or RTD probe.

What is clinical thermometer range?

Clinical Thermometer. Laboratory Thermometer. The temperature range is between 35°C and 42°C . The temperature range is between -10 and 110°C. Serves clinical purposes and measures human body temperature.

There are non-mercury thermometers with temperature and accuracy ranges equal to most mercury thermometers. An exception is on the high end of the temperature scale. Until recently 260° C was the typical limit for non-mercury thermometers.

Detailed Solution. Galinstan is used as a substitute for mercury in thermometers. Galinstan is a brand name and generic name for a liquid metal alloy made of a family of eutectic alloys consisting primarily of gallium, indium and tin.

Spirit thermometers use a non-toxic alcohol instead of mercury to register the temperature. Like liquid mercury, the alcohol expands in volume as it gets warmer, causing the liquid to move up the thin tube inside the glass thermometer. Digital thermometers contain a device called a thermoresistor.

Is mercury still used?

Most uses have been discontinued . Some medicines use small amounts of these compounds as preservatives. Learn about the use of thimerosal, a mercury-containing preservative, in vaccines. In addition, mercury is still used in skin lighteners and anti-aging products for the skin.

Gas-fired appliances, including ovens, water heaters, furnaces, poll heaters, and appliances in some recreational vehicles , may contain mercury. Older models may have pilot light sensors containing mercury.

You might be surprised to learn where mercury is found in your home and school. Thermometers (fever, cooking, outdoor), thermostats, fluorescent lamps, button batteries, and some switches or relays can all be a source of mercury.

(c) Other alternatives to mercury thermometers are Digital thermometers and Spirit thermometers .

Can mercury leak from thermometer?

In general, you can clean up a small mercury spill yourself, such as from a fever thermometer or thermostat .

If a test shows you have mercury poisoning (too much mercury in your body), your doctor can give you drugs that will remove the mercury from your body . Call the Poison Control Center toll-free, 1-800-222-1222, if you or your doctor need help understanding your test results.

The chemical element mercury (Hg) is sometimes called quicksilver because of its liquid metallic appearance. While the sight of metal pouring from the hand is intriguing, mercury is extremely toxic when inhaled or touched and should never be handled with bare skin .

The range of a clinical thermometer is from 35°C to 42°C .

Are non-mercury thermometers accurate?

Non-mercury thermometers have scale divisions equal to mercury thermometers. Most range from 0.5° to 1° C. Accuracy limits for non-mercury thermometers below 150° C are also compatible with mercury thermometers; accuracy is typically ± 1° - 2° C .

The mercury-free thermometer, Geratherm basal, has been developed by Geratherm Medical AG and contains a patented liquid alloy consisting of gallium, indium and tin – called Galinstan .