Room thermometers surround us everywhere and are familiar to us from the very childhood. What apartment or house does not have at least the simplest plastic air temperature meter? Without them it is difficult to monitor the microclimate in the room, so they must be present to help us by fixing the temperature regime.
They are used in living rooms, kindergartens, schools, offices, various industries and warehouses. They are universal, but depending on the type of premises can have different scales. So, one can show a temperature in the range from 0 ° C to + 50 ° C, while others - from -10 ° C and even -20 ° C to the same + 50 ° C. What unites them is that the price of division is always 1 ° C. Just some fit for heated rooms, and others - for industrial unheated rooms.
Types of room thermometers
Earlier there were few varieties - alcohol thermometers with a plastic, wooden or glass casing. Today, there are more advanced electronic instruments, which in addition to temperature can measure humidity, as well as show time, date and even play the role of an alarm clock.
And yet, wall-mounted alcoholic room thermometers were and are the most common and available. Depending on the material of manufacture, they have cases:
- plastic - the most common form, can be pure white, with different patterns, any other color depending on your interior;
- wooden - made of natural wood, painted with varnish;
- cardboard - on the basis of the pressed cardboard on which then various drawings are put;
- metal;
- glass - more often met before, recently home thermometers in the glass case are rare;
- gypsum - have a souvenir character, the body can have a different shape.
By the way, not all thermometers are based on changes in the volume of alcohol filling of the tube. There are thermometers mechanical. They can be found in your oven . They work on the same principle as electronic, but the sensor is a metal spiral or a bimetallic tape.
More complex measurement systems - optical and infrared. They record the temperature by changing the level of luminosity or spectrum. They are used mainly for medical purposes. Allow to measure temperature without direct contact with a person.
Children's room thermometers
They differ in bright design, unusual shapes in the form of animals, cartoon heroes, fish, fruits - anything. They are mainly made of high-quality plastic. Wooden such a room thermometer is rare, because in addition to measuring the temperature of the air, they can still measure the temperature of the bathing water in the bath. To do this, it is simply removed from the wall and lowered into the water. Usually on the scale is marked separately comfortable for bathing a baby
Digital room thermometers
A new era in the history of room temperature meters. They work from batteries, all indicators are output to a special screen (scoreboard). Depending on the model, can have many additional functions. If the device measures the humidity of the air, it is called a thermometer with a hygrometer and is an alternative to a psychometric hygrometer.
A variation of such a thermometer is a room-street instrument. They can be used both inside and outside the room. It is enough just to switch the mode on the front panel. For the street, the range is from -50 ° C to + 70 ° C, and for the room, respectively, from -10 ° C to + 50 ° C.