MBW Calibration AG was founded in 1962 and is headquartered in Wettingen, Switzerland. As of 2025, the company is 63 years old. MBW specializes in developing and manufacturing high-precision chilled mirror dew point hygrometers and humidity generators, serving industries such as calibration laboratories, compressed air systems, fuel cells, and battery manufacturing. In December 2020, MBW Calibration AG was acquired by Process Insights, joining a portfolio of premium brands in process instrumentation.

Most notably, MBW instruments provide the calibration traceability for many laboratories such as humidity instrument manufacturers and National Metrology Institutes.

MBW dew point mirrors continue to be chosen as transfer standards for inter-laboratory comparisons both regionally and internationally. With recent requirements for higher performance humidity measurement in the meteorological industry, MBW are increasingly the preferred supplier for low uncertainty measurement and calibration systems to National Meteorological and Hydrological Service organizations.

MBW is the leading provider of SF₆ gas quality analyzers based uniquely on chilled mirror technology that provides years of high precision and high stability measurements without frequent sensor replacement. 

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