In 1783, Swiss physicist and geologist, Horace Bénédict de Saussure, built the
first hygrometer using a human hair to measure humidity. In 1818, the German
inventor, Ernst Ferdinand August, coined the term psychrometer meaning
“cold measurer.” It’s a hygrometric instrument based on the principle that
dry air promotes evaporation, while wet air hinders it. Both methods are still
being used today to measure humidity. Along the way as technology advanced,
methods such as chilled mirror combined with electronic sensors greatly
advanced the accuracy and precision of humidity measurement.
From wall-mount thermohygrometers to multi-probe handheld instruments,
InnoCal offers humidity calibrations for virtually any brand or style of meter.
Our highly-trained technicians provide NIST-traceable accredited humidity
calibrations using Condensation Chilled Mirror Hygrometer technology in
a dedicated environmental chamber.
Testing range from 5 to 90% RH at uncertainties as low as
(K=2) ±0.59% RH
Testing at three points: 30, 60, and 80% RH with one temperature point
at ambient (22 to 25°C)
For customers who may not require the stringent testing afforded to
NIST-traceable calibrations, we also offer a Certificate of Accuracy.
This certificate does not include any test data—but states the instrument
conforms to the manufacturer’s published specifications and is not
NIST traceable.
ISO 17025 Accredited certificates are available for many measurement parameters. Call our experts or view our Scope of Accreditation for more information.
For more information or to schedule service please call 1-866-INNOCAL (1-866-466-6225)
InnoCal 625 East Bunker ct. M/S 14, Vernon Hills, IL 60061-1844 1-866-INNOCAL
Fax: 1-847-247-2984
Email: info@InnoCalSolutions.com
