How to Test a Hygrometer. Community Q&A. If you're a cigar aficionado, you need a hygrometer to make sure you're storing your wares at the correct humidity. A hygrometer is an instrument that is used to measure humidity in cigar humidors as well as greenhouses, incubators, museums, and more. To ensure that your hygrometer is functioning properly, it is best to test it prior to use, then calibrate it if necessary.
uk â /ÉªnËfÉË.mÉnt/ us â /ÉªnËfÉËr.mÉnt/. âº someone who gives information to another person or organization: a police/secret informant. Our survey is based on information from over 200 informants. Thesaurus: synonyms and related words.
noun. 1  A person or thing from which something comes into being or is derived or obtained: alternative sources of energy; the source of funding for the project. 2  The point of origin of a stream or river. 3  One, such as a person or document, that supplies information: A reporter is only as reliable as his or her sources.