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2. Meteorological instrumentation - Wikipedia

   en.wikipedia.org/wiki/Meteorological_instrumentation

   A thermometer measures air temperature, or the kinetic energy of the molecules within air. A barometer measures atmospheric pressure, or the pressure exerted by the weight of the Earth's atmosphere above a particular location. An anemometer measures the wind speed and the

3. List of weather instruments - Wikipedia

   en.wikipedia.org/wiki/List_of_weather_instruments

   Weather stations typically have these following instruments: Thermometer for measuring air and sea surface temperature; Barometer for measuring atmospheric pressure; Hygrometer for measuring humidity; Anemometer for measuring wind speed; Pyranometer for measuring solar radiation; Rain gauge for measuring liquid precipitation over a set period ...

4. Thermometer - Wikipedia

   en.wikipedia.org/wiki/Thermometer

   Many empirical thermometers rely on the constitutive relation between pressure, volume and temperature of their thermometric material. For example, mercury expands when heated. If it is used for its relation between pressure and volume and temperature, a thermometric material must have three properties: (1) Its heating and cooling must be rapid.

5. Thermodynamic instruments - Wikipedia

   en.wikipedia.org/wiki/Thermodynamic_instruments

   Thermometer – a device which measures temperature as described above; Barometer – a device which measures pressure, most notably atmospheric pressure. [3] An ideal gas barometer may be constructed by mechanically connecting an ideal gas to the system being measured, while thermally insulating it.

6. Weather station - Wikipedia

   en.wikipedia.org/wiki/Weather_station

   A weather instrument is any device that measures weather related conditions. Since there are a variety of different weather conditions, there are a variety of different weather instruments. Typical weather stations have the following instruments: Thermometer for measuring air and sea surface temperature; Barometer for measuring atmospheric pressure

7. Mercury-in-glass thermometer - Wikipedia

   en.wikipedia.org/wiki/Mercury-in-glass_thermometer

   To avoid this, some weather services require that all mercury-in-glass thermometers be brought indoors when the temperature falls to −37 °C (−35 °F). To measure lower meteorological temperatures, a thermometer containing a mercury- thallium alloy which does not solidify until the temperature drops to −61.1 °C (−78.0 °F) may be used.