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MMTS (meteorology)
A Maximum Minimum Temperature System or MMTS is a temperature recording system that keeps track of the maximum and minimum temperatures that have occurred over some given time period. The earliest, and still perhaps most familiar, form is the Maximum minimum thermometer invented by James Six in 1782. Today a typical MMTS is a thermistor. This may be read locally or can transmit its results electronically. See also * SNOTEL 300px, Data from a SNOTEL site in Elko County, Nevada SNOTEL is an automated system of snowpack and related climate sensors operated by the Natural Resources Conservation Service (NRCS) of the United States Department of Agriculture in the Weste ... References Meteorological instrumentation and equipment Thermometers {{Meteorology-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Maximum Minimum Thermometer
Six's maximum and minimum thermometer is a registering thermometer that can record the maximum and minimum temperatures reached over a period of time, for example 24 hours. It is used to record the extremes of temperature at a location, for instance in meteorology and horticulture. It was invented by the British scientist James Six, in 1780; the same basic design remains in use. It is also commonly known as a maximum–minimum, minimum–maximum, maxima–minima or minima–maxima thermometer, of which it is the earliest practical design. The thermometer indicates the current temperature, and the highest and lowest temperatures since the last reset. Description Six's Maximum and Minimum thermometer consists of a U-shaped glass tube with two separate temperature scales set along each arm of the U. One of these is for recording the maximum temperature encountered and the other for the minimum temperature. The arms of the U-shaped tube terminate in sealed glass bulbs. The b ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
James Six
James Six FRS (1731 – 25 August 1793) was a British scientist born in Canterbury. He is noted for his invention, in 1780, of Six's thermometer, commonly known as the maximum- minimum thermometer. This device is still in common use today and widely sold in garden centres. Life Six was from a family of refugees from the Continent who had settled in England in the reign of Queen Elizabeth I, and who had worked as silk weavers for generations. James Six himself had trained in the family business, but by his time this was in decline because of cheap imported silks from India and Persia. He became interested in natural philosophy, and devoted himself to astronomy and meteorology. In 1782 The Royal Society of London published an account of the thermometer that Six had invented two years earlier. In 1784, Six was elected a member of the American Philosophical Society in Philadelphia. He became a Fellow of the Royal Society in 1792, his election was the result of this and other papers he ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Thermistor
A thermistor is a type of resistor whose resistance is strongly dependent on temperature, more so than in standard resistors. The word thermistor is a portmanteau of ''thermal'' and ''resistor''. Thermistors are divided based on their conduction model. Negative Temperature Coefficient (NTC) thermistors have ''less'' resistance at ''higher'' temperatures, while Positive Temperature Coefficient (PTC) thermistors have ''more'' resistance at ''higher'' temperatures. Hence, a PTC thermistor's resistance is directly proportional to temperature. NTC thermistor are widely used as inrush current limiters, temperature sensors, while PTC thermistors are used as self-resetting overcurrent protectors, and self-regulating heating elements. An operational temperature range of a thermistor is dependent on the probe type and is typically between −100 °C and 300 °C (−148 °F and 572 °F). Types Depending on materials used, thermistors are classified into two types: *With ''NTC'' the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
SNOTEL
300px, Data from a SNOTEL site in Elko County, Nevada SNOTEL is an automated system of snowpack and related climate sensors operated by the Natural Resources Conservation Service (NRCS) of the United States Department of Agriculture in the Western United States. There are over 730 SNOTEL (or snow telemetry) sites in 11 states, including Alaska. The sites are generally located in remote high-mountain watersheds where access is often difficult or restricted. Access for maintenance by the NRCS includes various modes from hiking and skiing to helicopters. All SNOTEL sites measure snow water content, accumulated precipitation, and air temperature. Some sites also measure snow depth, soil moisture and temperature, wind speed, solar radiation, humidity, and atmospheric pressure. These data are used to forecast yearly water supplies, predict floods, and for general climate research. History Installation of SNOTEL began in the mid-1960s. Its use in climate forecasting was not orig ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Meteorological Instrumentation And Equipment
Meteorology is a branch of the atmospheric sciences (which include atmospheric chemistry and physics) with a major focus on weather forecasting. The study of meteorology dates back millennia, though significant progress in meteorology did not begin until the 18th century. The 19th century saw modest progress in the field after weather observation networks were formed across broad regions. Prior attempts at Weather prediction, prediction of weather depended on historical data. It was not until after the elucidation of the laws of physics, and more particularly in the latter half of the 20th century the development of the computer (allowing for the automated solution of a great many modelling equations) that significant breakthroughs in weather forecasting were achieved. An important branch of weather forecasting is marine weather forecasting as it relates to maritime and coastal safety, in which weather effects also include atmospheric interactions with large bodies of water. Li ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
