Overview: what is a thermometer and what do different types of devices measure

This is a device designed to accurately measure the temperature of water, soil, air, the human body, products and so on. The device, remotely resembling a modern thermometer, was invented by Galileo Galilei in 1592. The inventor of the mercury thermometer was Fahrenheit, then the instrument was modified by Celsius.

In its current form, a thermometer is an indispensable assistant that is used in various fields of human activity.

Types of Thermometers

1. Liquid.
2. Gauge.
3. A device operating on the principle of resistance.
4. Thermoelectric.
5. Electronic.
6. Electrical contact.
7. Digital.
8. Condensation.
9. Gas.

Also there are devices for measuring temperature:

1. Bimetallic.
2. Quartz products.

Consider what their principle of action is.

Liquid - an ordinary glass thermometer, used in everyday life, in technical industries. The scheme of work is as follows: when the temperature changes, the liquid expands and rises, with a decrease - it goes down. The device uses mercury or alcohol-containing substances.

Gauge. The principle of its operation is the change in fluid in a confined space with temperature fluctuations. The device can operate in the range of -60 to +600 degreesUsed in hazardous areas.

Resistance thermometer. The basis of his work is the principle of the properties of bodies to change electrical resistance with a parallel change in temperature. There are semiconductor and metal thermometers.

Thermoelectric device. His work is affected by the material of manufacture. When taking readings, you need to make a small correction.

Electronic - can measure temperature at a distance. Readings can be taken from a distance of several hundred meters. The temperature-sensitive sensor and laser indicator are installed in separate rooms.

Electrical contact device - signaling devices that respond to temperature changes, operate from -35 to +300 degrees, are used in industrial, energy, laboratory installations.

Digital equipment is the most accurate meter. The parameters of the device directly depend on the sensors used. Condensing apparatus - have high sensitivity, operate on the principle of elasticity of saturated vapors of low-boiling liquid from zero degrees.

Gas construction. In this embodiment, the principle of the relationship between temperature and pressure of a thermometric substance works.

Bimetallic option. His work is the difference in thermal expansion of substances. Devices are used in marine and river vessels and nuclear power plants.

Quartz meters work correctly at temperatures not exceeding 100 degrees.

Read also: use of a thermometer without mercury. pros and cons.

What is a thermometer for?

Not a single family can live without it, they can measure not only body temperature, it is also used for water and soil. The air temperature outside the window is measured with a street thermometer.

Meat gauges exist. For the storage of elite products, it is important to maintain a certain temperature regime. For these purposes, use a special wine thermometer.

The nuances of children's thermometers

Thermometer for measuring temperature in the oral cavity.

For children, including the smallest, thermometers in the form of nipples, ear infrared meters have been developed.

Types of baby thermometers

Mercury and electronic devices are considered traditional.

Features of mercury thermometers designed for children

Features of electronic thermometers designed for children

Features of infrared thermometers for children.

Types of household infrared thermometers

What to do if a thermometer crashes?

If the appliance crashes, and the toxic substance, which is mercury, was on the floor of the room, you must:

1. Ventilate the room immediately by opening the windows.
2. Leave the hazardous area.
3. To localize the focus, it is necessary to tightly close the doors in the room.
4. At the entrance you need to lay a wet cloth moistened with potassium permanganate.
5. Call mercury cleaners.

Mercury in the apartment should be collected by specialists.

Do not collect mercury on the floor yourself. Assign this process to specialists.

Acquisition Recommendations

It is better to buy a thermometer in specialized stores or pharmacies. It should be issued in a special container, its integrity must be checked right there. A certificate is required. When paying, you need to require a check.

Keep the thermometer out of the reach of children, do not leave them alone when measuring body temperature.