The Hygrometer and Thermometer Canaries

I installed a hygrometer and a thermometer in my room kennel is very convenient, especially when breeding. The moisture content will allow me to know if I should spray the eggs or not, to facilitate hatching. The thermometer will inform me if I have to raise the temperature in the room using a small electric heater.

The humidity characterizes the degree of humidity of moist air (or relative humidity), and is measured with a hygrometer.

The hygrometer is the most simple hair hygrometer, which uses the property of horse hair or human hair to lengthen or shorten proportionally when the relative humidity varies. The longer hair is about 2% when the humidity (relative) varies from 0 to 100% For the record, blond hair are more sensitive to changes in humidity that brown hair. It also uses the PBO (gold beater skin) that has similar properties and is based beef intestine.

A thermometer is a device used to measure temperatures. This is the area of ​​study of thermometry.


In fact, a thermometer measures its own temperature (that of his party is used to measure). This temperature is that of the environment if there is thermal equilibrium between the thermometer and the environment.

This means, for example, that if a thermometer is exposed to the sun, it will be warmer than the air, and this temperature difference will depend entirely on its color and its breakdown, so that a temperature measured under these conditions is entirely fanciful in relation to air temperature. (That's why meteorologists measure temperature in ventilated shelter.)

Temperature measurement can be based on the expansion of the body (solid, liquid or gaseous), or any other physical property (electrical variations in the case of the thermocouple, the color of light emission for high temperatures, etc..) Depending the temperature. This general principle is implemented in many different ways as needed (to measure temperature ranges, type of materials to study, etc.).. The usual liquid thermometers are mercury thermometers and thermometers alcohol.

The thermometers are multiple applications, meteorology, medicine, for control in industrial processes, etc..

Units of measure

There are thermometers gives temperature measurements in the three major systems: Celsius, Kelvin, Fahrenheit. However, it should be noted that the unit of reference is the kelvin, used in the international system.

Source: Wikipedia

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