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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.
Incubators are essential for much experimental work in cell biology, microbiology and molecular biology and are used to culture both bacterial and eukaryotic cells. An incubator is made up of a chamber with a regulated temperature. Some incubators also regulate humidity, gas composition, or ventilation within that chamber.
A simple plastic air tight container can be used for the purpose of incubation. In lid small tiny holes are made for ventilation. equal amount of perlite and distilled water is mixed to make it moist. When pressed it should not drain water from it. put a humidity and temperature meter. a humidity of 80-90% is required.
Absolute humidity is expressed as either mass of water vapor per volume of moist air (in grams per cubic meter) [3] or as mass of water vapor per mass of dry air (usually in grams per kilogram). [4] Relative humidity , often expressed as a percentage, indicates a present state of absolute humidity relative to a maximum humidity given the same ...
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.
An incubator is a device simulating avian incubation by keeping eggs warm at a particular temperature range and in the correct humidity with a turning mechanism to hatch them. The common names of the incubator in other terms include breeding / hatching machines or hatchers , setters , and egg breeding / equipment .
He invented a mercury thermostat to regulate the temperature of a chicken incubator. [6] This is one of the first recorded feedback-controlled devices. Modern thermostatic control was developed in the 1830s by Andrew Ure (1778–1857), a Scottish chemist. The textile mills of the time needed a constant and steady temperature to operate ...
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.
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