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CMH-RPC | Precision Chilled Mirror Dewpoint Hygrometer
Featuring 3-stage chilled mirror technology and integral cooling, the CMH-RPC delivers precise and continuous moisture measurements up to -95 °C frost/dew point, translating to 37 ppb(V), making it an indispensable tool for high-accuracy applications.
The CMH-RPC offers unmatched accuracy for critical applications in laboratories and research facilities and as a reference standard for calibrating other moisture measurement instruments, delivered ready for immediate bench-top installation.
Our Model CMH Chilled Mirror Hygrometer accurately measures the dewpoint of a gas by cooling a mirrored surface, over which the gas flows until a layer of dew forms on the surface.
The Chilled Mirror Dew Point Hygrometer utilises a 3-stage cooler combined with an integral refrigeration unit to measure the dewpoint in gases from below -95 °C to 20 °C (-139 °F to 68 °F) dewpoint with an accuracy of ±0.2 °C dewpoint.
This primary measurement principle makes the CMH-RPC the ideal instrument for laboratory, scientific, and research applications and a reference instrument for checking and dewpoint calibration of dewpoint meters, dewpoint transmitters, dew meters and dewpoint analysers.
The optional pressure transducer allows for displayed pressure measurements, enhancing the instrument’s utility and application range.
- Highly customised solutions
- Trusted by industry leaders
- Distributors worldwide
- Over 30 years experience
Precision and reliability for advanced applications
Key features
- High accuracy of ±0.2 °C (±0.36 °F) dewpoint, suitable for laboratory, scientific research and reference applications.
- Backlit LCD that displays readings in °C or °F dewpoint and ppm(V), offering clarity and flexibility in data presentation.
- Sample pressure of 0 to 20 bar (0 to 300 psia) maximum.
- Analogue output at 0-5 VDC, 4-20 mA, 0-10 VDC, or 0-20 mA.
- Optional temperature and pressure sensors to expand measurement capabilities and provide comprehensive environmental monitoring.
- RS232 serial communications for straightforward integration with data logging and monitoring systems, as well as printers.
- Two programmable alarm relays for implementing threshold-based actions or alerts, improving process control.
- Automatic Balance Control (ABC) for fast and straightforward measurement and control, simplifying operation and ensuring optimal performance.
- Supplied with a calibration certificate traceable to National and International Humidity standards, guaranteeing precision and compliance.
Technical Data
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Frequently Asked QuestionsIf you have a question that’s not answered below, please contact us
The CMH-RPC should be installed in safe areas as it is not certified for hazardous locations.