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A hygrometer is an instrument which measures the humidity of air or some other gas: that is, how much of it is water vapor. [1] Humidity measurement instruments usually rely on measurements of some other quantities such as temperature, pressure, mass, and mechanical or electrical changes in a substance as moisture is absorbed.
Moisture meters are measuring instruments used to measure the percentage of water in a given substance, as physical properties are strongly affected by moisture content and high moisture content for a period of time may progressively degrade a material. Meters exist for various substances, including wood, building materials, concrete, and soil.
A humidistat or hygrostat is an electronic device analogous to a thermostat but which responds to relative humidity, not temperature. A typical humidistat is usually included with portable humidifiers or dehumidifiers. It can also be included with combined air cleaner or humidifier units to control a home's humidity level or any other indoor ...
In December 2009, FLIR Systems sold Extech Data Systems, a division of Extech which made portable printers. [1] [3] In November 2011, the company relocated to Nashua, New Hampshire. [4] In May 2012, the Extech HDV640W High Definition Wireless Articulating Videoscope received the 2011 Breakthrough Product of the Year award from Processing ...
48% Humidity. 30.23 in Pressure. 2 UV Index. 5:17PM Sunset. 2 mph F 3 km/h C Wind. 7 ... This Rural North Dakota Home Came With A 40-Year Weather Legacy. Now, Someone Else Is Carrying It On.
Measuring instruments in fiction: Captain Nemo and Professor Aronnax contemplating thermometers, barometers, clocks, etc. in Jules Verne's 1869-1870 science fiction novel Twenty Thousand Leagues Under the Seas Fun measuring instruments: a Love Meter and strength tester machine at a Framingham, Massachusetts rest stop.
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1859 E. Smith developed a portable spirometer, which he used to measure gas metabolism. 1866 Henry Hyde Salter (1823-1871) added a kymograph to the spirometer in order to record time while obtaining air volumes. 1879 Gad J. published a paper entitled "Pneumatograph" that described a machine that allowed the recording of lung volume changes.
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