Vaisala has launched the DMP370 Intrinsically Safe Dew Point Instrument for hazardous locations. The new instrument extends Vaisala's proven DRYCAP® dew point technology into hazardous locations. The DMP370 enables continuous, drift-compensated moisture measurement in hydrogen production, renewable and natural gas infrastructure, chemical processing and other industrial applications where combustible gases or dust may be present.
As hydrogen and biomethane production and other decarbonized gas applications expand, reliable moisture measurement is becoming increasingly important across both new and existing gas infrastructure. Moisture plays a critical role in many gas processes. Excess moisture can compromise fuel cell performance, reduce process efficiency, shorten equipment lifetime, and increase operational risks in gas infrastructure, electrolyzers, and industrial processing facilities. In many of these environments, only equipment certified for hazardous locations may be used.
Overcoming compromises
Measuring moisture in hazardous locations has traditionally involved trade-offs. Some solutions require additional protective enclosures or introduce installation constraints, depending on the protection concept and application. Other technologies periodically interrupt measurements during regeneration or heating cycles, creating gaps in monitoring data. The new DMP370 addresses these challenges by combining intrinsic safety with uninterrupted measurement. The solution is enabled by Vaisala's proven DRYCAP® dew point technology and an innovative drift-compensation solution.
The DMP370 combines Vaisala’s DMP37X probe and HMT370EX transmitter into a single intrinsically safe solution. Intrinsic safety limits the instrument's electrical energy by design, preventing it from becoming an ignition source in explosive atmospheres. The DMP370 measures continuously, combining fast response with long-term stability, providing operators with uninterrupted gas-quality data without measurement gaps. The instrument’s measurement range is -70°C ... +10°C Td/f with a typical accuracy of ±2°C Td/f. Delivery to customers start in Q1 2027.
