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  2. Indoor–outdoor thermometer - Wikipedia

    en.wikipedia.org/wiki/Indooroutdoor_thermometer

    Indoor-outdoor thermometer. An indooroutdoor thermometer is a thermometer that simultaneously provides a measurement of the indoor and outdoor temperatures. The outdoor part of the thermometer requires some kind of remote temperature sensing device. Conventionally, this was done by extending the bulb of the thermometer to the remote site.

  3. Quartz clock - Wikipedia

    en.wikipedia.org/wiki/Quartz_clock

    In laboratory settings atomic clocks had replaced quartz clocks as the basis for precision measurements of time and frequency, resulting in International Atomic Time. By the 1980s, quartz technology had taken over applications such as kitchen timers , alarm clocks , bank vault time locks , and time fuzes on munitions, from earlier mechanical ...

  4. History of timekeeping devices - Wikipedia

    en.wikipedia.org/wiki/History_of_timekeeping_devices

    As incense burns evenly and without a flame, the clocks were safe for indoor use. [53] To mark different hours, differently scented incenses (made from different recipes) were used. [54] The incense sticks used could be straight or spiralled; the spiralled ones were intended for long periods of use, and often hung from the roofs of homes and ...

  5. Programmable thermostat - Wikipedia

    en.wikipedia.org/wiki/Programmable_thermostat

    Programming the morning temperature to be 21° C at 7:00 a.m., for instance, ensures that the temperature would then be 21 °C, whereas less sophisticated programmable thermostat would simply start working toward 21° at 7:00 a.m. Thus a PID controller sets the time at which the system should be activated in order to reach the desired ...

  6. Temperature measurement - Wikipedia

    en.wikipedia.org/wiki/Temperature_measurement

    Such thermometers are usually calibrated so that one can read the temperature simply by observing the level of the fluid in the thermometer. Another type of thermometer that is not really used much in practice, but is important from a theoretical standpoint, is the gas thermometer .

  7. Radio clock - Wikipedia

    en.wikipedia.org/wiki/Radio_clock

    In the 2000s (decade) radio-based "atomic clocks" became common in retail stores; as of 2010 prices start at around US$15 in many countries. [22] Clocks may have other features such as indoor thermometers and weather station functionality. These use signals transmitted by the appropriate transmitter for the country in which they are to be used.