Alpha | CMH-P2 | Portable Chilled Mirror Hygrometer
The accuracy of a laboratory standard hygrometer in a compact, transportable package. Equipped with a thermo-electric chiller for precise control of the chilled mirror temperature, this hygrometer is ideal for accurate measurement of trace moisture in gases.
The CMH-P2 Portable Chilled Mirror Hygrometer is a trusted choice for calibration engineers and manufacturing personnel, offering the Primary Standard Measurement Technique in a portable, self-contained unit. Perfect for troubleshooting, continuous monitoring, and convenient spot-check measurements, this hygrometer helps eliminate downtime, reduce maintenance costs and improve quality control.
Featuring a drift-free, highly durable chilled mirror sensor with minimal maintenance requirements, certified to National & International Humidity Standards, the CMH-P2 provides all the standard features of the CMH-RPC model in a portable form. With quick dry down, fast response and long battery life, accurate data can be collected for an entire shift or spot check measurements conducted over several days without needing to recharge the battery. The Automatic Balance Control function standardises and automatically corrects for contaminants, to ensure reliable measurements.
Other Products and Services from Alpha Moisture Systems
DS1500 Display
A sophisticated, panel mount, single-channel display, designed to enhance continuous trace moisture measurement in various gases and dry compressed air systems — when used with a compatible dewpoint transmitter.
The DS1500 incorporates RS485 and MODBUS (RTU) capabilities to facilitate remote interrogation and comprehensive communication with the AMT, AMT-Ex and PDT dewpoint transmitters, for continuous trace moisture measurement across a range of applications.
Factory configured to user specifications, the DS1500 can display measurements in °C dewpoint, °F dewpoint, ppm(V), ppb(V), g/m³, or lb/MMSCF on a large, six-digit, red LED display, providing clear and immediate data readouts. It offers Process Variable (PV) retransmission in 0-20 or 4-20 mA and is user-configurable to input pressure for pressure dewpoint conversion — offering a solution that is as versatile as it is reliable.
AMT-Ex Dewpoint Transmitter
A robust solution for continuous moisture measurement in process gases and compressed air, featuring ultra-high capacitance aluminium oxide sensing technology. Certified intrinsically safe to ATEX and IECEx standards for use in hazardous areas.
Our AMT-Ex Dewpoint Transmitter is a compact 3-wire, 4-20 mA, loop-powered transmitter that offers continuous online moisture measurement across various dewpoint ranges from -110 °C to +20 °C — accurate to ±2 °C (±3.6 °F) dewpoint.
Its advanced RISC microprocessor circuitry provides high resolution and sophisticated self-diagnostics. Equipped with a unique AutoCal span correction feature, the AMT-Ex Dewpoint Transmitter facilitates field calibrations and span checks, ensuring optimal accuracy between laboratory calibrations. The rugged stainless steel construction provides protection to IP66 / NEMA 4X, with the transmitter’s electrical connections made via a secure industrial connector.
Dewpoint Calibration Services
Maximise precision and reliability with our comprehensive dewpoint calibration services, designed to ensure the accuracy of your moisture measurement instruments.
Alpha Moisture Systems
Network House, 5 Lister Hill, Leeds, West Yorkshire, LS18 5AZ, United Kingdom
Alpha Moisture Systems has led trace moisture measurement for over 30 years, offering precision solutions like dewpoint hygrometers, transmitters, and sample systems. We deliver world-class products, bespoke engineering, and expert support. Contact us to discuss your needs.