nestelämpömittaria

Nestelämpömittari, or liquid-in-glass thermometer, is a temperature measuring device that uses the principle of thermal expansion of a liquid. The most common type utilizes a glass tube filled with a colored liquid, such as alcohol or mercury, and a sealed bulb at one end. As the temperature rises, the liquid inside the bulb expands and moves up the narrow tube, which is marked with a scale. Conversely, when the temperature falls, the liquid contracts and moves down the tube. The scale allows for direct reading of the temperature. These thermometers are often used in households for measuring ambient room temperature or body temperature. They are also found in scientific laboratories and industrial settings for various applications. The accuracy of a nestelämpömittari depends on the quality of the glass, the precision of the calibration, and the properties of the liquid used. Mercury thermometers, while accurate, are less common now due to health concerns associated with mercury. Alcohol-based thermometers are a safer alternative and are widely available. The simple design and reliable operation have made nestelämpömittari a long-standing tool for temperature measurement.