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A temperature data logger, also called temperature monitor, is a portable measurement instrument that is capable of autonomously recording temperature over a defined period of time. The digital data can be retrieved, viewed and evaluated after it has been recorded.
The integrated circuit sensor may come in a variety of interfaces — analogue or digital; for digital, these could be Serial Peripheral Interface, SMBus/I 2 C or 1-Wire.. In OpenBSD, many of the I 2 C temperature sensors from the below list have been supported and are accessible through the generalised hardware sensors framework [3] since OpenBSD 3.9 (2006), [4] [5]: §6.1 which has also ...
Also, precipitation measurements are difficult, especially for snow, as the gauge must empty itself between observations. For present weather, all phenomena that do not touch the sensor, such as fog patches, remain unobserved. [1] The change from manual observations to automatic weather stations is a major non-climatic change in the climate ...
They also can only be used over a limited temperature range due to the different expansion rates of the substrate and resistive deposited giving a "strain gauge" effect that can be seen in the resistive temperature coefficient. These elements work with temperatures to 300 °C (572 °F) without further packaging, but can operate up to 600 °C ...
Indoor-outdoor electronic thermometers are a frequent hobbyist project and are sometimes sold as kits. Many indoor-outdoor thermometers on sale are wireless devices requiring no physical connection to the sensor placed outside. In these cases the sensor needs to be battery-powered. [4]
Temperatures are recorded along the optical sensor cable, thus not at points, but as a continuous profile. A high accuracy of temperature determination is achieved over great distances. Typically the DTS systems can locate the temperature to a spatial resolution of 1 m with accuracy to within ±1 °C at a resolution of 0.01 °C.