Hygrometer
A hygrometer is an instrument used to measure the amount of water vapor in air, in soil, or in confined spaces. Humidity measurement instruments usually rely on measurements of some other quantities such as temperature, pressure, mass, a mechanical or electrical change in a substance as moisture is absorbed. By calibration and calculation, these measured quantities can lead to a measurement of humidity. Modern electronic devices use temperature of condensation (called the dew point), or changes in electrical capacitance or resistance to measure humidity differences. A crude hygrometer was invented by Leonardo da Vinci in 1480. Major leaps came forward during the 1600s; Francesco Folli invented a more practical version of the device, while Robert Hooke improved a number of meteorological devices including the hygrometer. A more modern version was created by Swiss polymath Johann Heinrich Lambert in 1755. Later, in the year 1783, Swiss physicist and Geologist Horace Bénédict de Saussure invented the first hygrometer using human hair to measure humidity.
The Selected Suppliers You Might Like
Shenzhen iSmart Electronic Co., Ltd.
SHENZHEN ISMART ELECTRONIC CO., LIMITED is a leading manufacturer, wholesaler and exporter of sensor module, power supply module, LCD module, thermometer hygrometer, humidity temperature controller, relay module, 3d printer parts. With rich experiences to make a variety production line, ISMART has been extremely knowledgeable in this area and prominent in domestic and international market sinch 2009. With 2,000 square meter factory, over 80 workers, and strong R&D department. Factory production line experienced workforce along with well-organized management personnel have worked together and implemented a strict quality control standard. It has keep our company successfully growing and thriving. We dedicate ourselves to teaming up with all our clients for achieving trustworthy partnership relations by providing the high valued sensor module, power supply module, LCD module, thermometer hygrometer, humidity temperature controller, relay module, 3d printer parts.
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WE BELIEVE THAT "THE QUALITY IS THE SOUL OF AN ENTERPRISE"
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Please contact Jessie Zhong (Marketing Director -008613620975435)
Shenzhen Cheerman Technology Co., Ltd.
In June 2012, Shenzhen Cheerman Technology Co., Ltd was built for OEM manufacturing.
In July 2014, CHEERMAN ELECTRONICS (U.S.A.)Inc was built in U.S.A.
As a manufacturer of infrared thermometer ,digital thermometer and hygrometer ,Cheerman is specializing in their designing, researching and producing professionally .It has been into production for total 32 molds with more than eighty models from -50 to 1600 Celsius degree (8-14um wavelength) and 1600 to 3000 Celsius degree (0.9 to 1.7um wavelength), including pen type, mini type, gun type,hand type, pocket type, fixed type and small device matching transmitter type, etc. The different temperature ranges can meet the requirements from different customers for industrial test, food test, etc to be an expert on infrared thermometer and digital thermometer .
Now its products have 2 patents of utlity model,20 patents of appearance, nine trademarks and have been approved with CE, RoHs, FCC, FDA, and also China Metrology Certificate (abbr.: CMC)
Now it is exporting its infrared thermometers and digital thermometers worldwide as a largest production base in the world!
Ningbo Colorlife Plastic Co., Ltd.
Colorlife Plastic Co.,Ltd is a company specializing in different kinds of thermometer,weather station,rain gauge,timer and gifts(festival gifts and promotional gifts). We have our own factory and strong sourcing capability. We have designers and can make the products according to customers' designs.
We mainly sell our products to professional customers in Europe and the USA. We have done this business for more than 15 years.
"Competitive price, good quality and nice safe package" is our advantage.Hope both of us have a colorful future.