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Dew Point Chilled
Mirror Hygrometers 

Leading Experts in Humidity Measurement & Calibration Systems 

We are an ISO/IEC 17025 accredited SCS calibration laboratory delivering the highest, traceable accuracy in temperature and humidity | SCS Calibration Laboratory.  As an internationally recognized leading manufacturer of high-quality dew point chilled mirror hygrometers used in a variety of humidity calibration, measurement and gas quality applications, our MBW™ instruments provide the calibration traceability for many laboratories such as humidity instrument manufacturers and National Metrology Institutes.  Our chilled dew point mirrors continue to be the transfer standard for inter-laboratory comparisons both regionally and internationally.

Our MBW chilled mirror analyzers have a typical service life of more than 15 years thanks to the use of high-quality materials and Swiss precision engineering. The high-quality platinum resistance thermometer (PRT) element embedded within the mirror ensures excellent long-term measurement stability. Thanks to the precise dew point and temperature measurements as well as the stability and long service life, our chilled mirrors are used by national standards and accredited laboratories worldwide.

Our chilled mirror analyzers typically offer high accuracy, repeatability, and sensitivity, as well as low maintenance requirements and a wide measurement range. They are also suitable for measuring the dew point temperature of various gases, including compressed air, natural gas, and industrial gases, as well as for measuring the frost point temperature of refrigerants and other low-temperature fluids.

Our MBWchilled mirror analyzers offer several benefits:

  • High accuracy: Provide highly accurate and precise measurements of dew point, frost point, and other humidity-related parameters. The chilled mirror technique is considered to be the most accurate method for measuring these parameters, and MBW analyzers use advanced technology to achieve high accuracy and repeatability.
  • Wide measurement range: Capable of measuring a wide range of dew point temperatures, from -100°C to +100°C, making them suitable for a wide range of applications. They can also measure frost point temperatures down to -90°C, making them suitable for low-temperature applications.
  • Fast response time: Provide fast response times, allowing for real-time monitoring and control of humidity levels. They can measure dew point or frost point temperatures in seconds, which is important for applications that require rapid detection of moisture or humidity changes.
  • Low maintenance:  Easy to maintain and have low maintenance requirements. The mirror surface is the only part that requires cleaning, and this can be done quickly and easily using standard cleaning procedures.
  • Robust design: Designed for use in harsh environments and can withstand high levels of moisture, dust, and other contaminants. They are also durable and have a long service life, making them a cost-effective solution for humidity measurement.
  • Versatility: Can be used in a wide range of applications, including industrial processes, meteorology, and laboratory analysis. They can measure humidity levels in various gases, including compressed air, natural gas, and industrial gases.

We are revolutionizing measurement everywhere!

For a complete range of analytical instrumentation, applications, systems, and service options, please contact us.   We will work to match your needs and budget and provide the optimal, and most stable process analysis solution for your application.

Industries that use our chilled mirror analyzers:

  • Power generation
  • Semiconductor manufacturing
  • Petrochemical production
  • Food and beverage production
  • Gas quality control
  • Chemical processing
  • Gas production
  • Medical industry
  • Research and development
  • Pharmaceutical manufacturing


As a Swiss Designated Institute (DI) for hygrometry, we have a responsibility for maintaining and improving the standards for humidity in Switzerland. To achieve this, we continually improve methods of calibration by implementing new techniques to extend our range of capability and improve our published CMC (Calibration and Measurement Capability). We have implemented Primary Realizations for low and high range humidity generation (based on temperature and pressure).  This has resulted in CMCs that compare favorably with the leading National Metrology Institutes worldwide.

Our CMC can be viewed here at the Swiss Accreditation Service (SAS) website.  As an accredited provider, we are regularly audited by external technical and quality assessors who regularly compare calibration with other NMIs or DIs.  

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We offer a complete range of services and technical support to support all the dew point chilled mirror products we manufacture and supply. 


Americas +1 713.947.9591
EMEA +49 69 20436910
China/APAC +86 400 086 0106


An essential part of our role as the Designated Institute for humidity is fundamental research. This activity is driven by the necessity for continual improvement in our knowledge, the reduction in our measurement uncertainties, and specific requirements from our customers and business partners.  Our in-house research laboratory is equipped with humidity and temperature generation equipment that compares with the very best laboratories around the world, so we are able to replicate operational conditions that mirror our customers activity. In combination, we have a comprehensive range of analytical equipment that enable us to thoroughly investigate cause and effect.

As an example, we are able to photograph and video condensation formation on the chilled mirrors in our transfer standard mirrors. This has enabled us to solve issues where interference effects have increased measurement uncertainties in certain scenarios.

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Climatic chambers are in widespread use across many industries. They are used to simulate climatic conditions including temperature, humidity, pressure, vibration and light intensity. Conditions must be controlled and varied according to user or test specifications. Our MBW products can provide the simulation of climatic conditions including temperature, humidity, pressure, vibration and light intensity.  You can find our products in automotive component test chambers, pharmaceutical stability chambers, calibration test chambers, and military electronics testing. Explore our climate validation services.

Climatic chambers are in widespread use across many industries. They are used to simulate climatic conditions including temperature, humidity, pressure, vibration and light intensity. Conditions are controlled or varied according to user or test specifications. Products and samples are placed within the controlled environment according to defined test specifications that require certain conditions to be maintained. Examples include 40 °C / 75 %rh for drug stability and 85 °C / 85 %rh for electronic component testing. Confirmation that the correct environmental conditions have been achieved is a pre-requisite for compliance with the respective standards that apply in each industry.

We are active members in:   (industry groups)


As a Designated Institute, MBW CALIBRATION is an associate of EURAMET and is allowed to participate in issues on:

  • Temperature
  • Humidity and moisture
  • Thermophysical quantities of materials
  • Scales, standards and reference materials


As a Designated Institute, MBW CALIBRATION is an associate of EURAMET and is allowed to participate in issues to share and develop knowledge on ISO/IEC 17025 and on the implementation into the National Metrology Institutes (NMIs).


MBW CALIBRATION chilled mirror analyzers are most commonly used as the transfer standard to maintain traceability.  As a Swiss Designated Institute for Hygrometry (DI), we participate in different activities, working groups, committees etc. related to metrology. 


We perform humidity calibration and MBW is ISO17025 certified.  We are leaders in humidity standards. Our chilled mirror analyzers provide long-term stability to achieve lower uncertainty of calibration (CMC) levels.


MBW Calibration GmbH in Fellbach is a calibration laboratory (D-K-21411-01) for humidity and temperature accredited by the German Accreditation Body (DAkkS) according to DIN EN ISO/IEC 17025. IN EN ISO/IEC 17025, the international standard for laboratory operation and management. As an accredited DAkkS/ DKD calibration laboratory, this certifies our quality and reliability of our test and measurement results.  Our customers can trust our results.


MBW CALIBRATION is an active associate of EURAMET. EURAMET is responsible for the execution of the European Metrology Research Programme (EMRP) whose mission is to develop an internationally competitive measurement infrastructure for Europe. 
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