Vaisala, a leading provider of measurement instruments and intelligent solutions, has unveiled its latest product, the DMP370 dew point meter, specifically designed for use in hazardous environments. This innovative device is set to enhance the monitoring of hydrogen, biogas, and industrial gas infrastructures, ensuring continuous dew point measurement in potentially explosive atmospheres.

Introduction of the DMP370

Announced at the Gastech 2026 event in Bangkok, the DMP370 integrates Vaisala’s renowned DRYCAP® dew point technology for the first time in such demanding applications. The device is engineered to provide uninterrupted moisture measurement, compensating for measurement drift, which is crucial in environments where flammable gases or dust may be present.

Growing Demand for Reliable Moisture Measurement

According to the International Energy Agency’s (IEA) Global Hydrogen Review 2026, global demand for hydrogen surpassed 100 million tonnes in 2025. A significant portion of this demand arises from industrial processes where gas quality directly impacts safety, equipment performance, and operational reliability. As the production of hydrogen and biogas, along with other low-carbon gas applications, becomes more prevalent, the need for reliable moisture measurement in both new and existing gas infrastructures is increasingly critical.

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The Importance of Moisture Control

Moisture management is a vital aspect of many gas processes. Excessive moisture can impair the performance of fuel cells, reduce process efficiency, shorten equipment lifespan, and elevate operational risks within gas infrastructures, electrolyser systems, and industrial processing facilities. In many of these environments, only devices certified for use in hazardous locations are permitted.

Addressing Challenges with the DMP370

Traditionally, measuring moisture in hazardous environments has necessitated compromises. Some solutions require additional protective enclosures or limit installation options based on the protection method and application. Other technologies may interrupt measurements during regeneration or heating cycles, resulting in gaps in measurement data. The DMP370 addresses these challenges by combining intrinsic safety with continuous measurement capabilities.

Technical Specifications and Features

The DMP370 is built upon Vaisala’s reliable DRYCAP® dew point technology, incorporating an innovative measurement drift compensation solution. It combines the DMP37X probe with the HMT370EX transmitter into a single intrinsically safe unit. This design ensures that the device’s electrical energy is structurally limited, preventing it from becoming an ignition source in hazardous locations.

Key specifications of the DMP370 include:

• Measurement range: -70 °C to +10 °C Td/f
• External accuracy: ±2 °C Td/f (typical)
• Temperature range: -40 °C to +60 °C
• Pressure range: 0–40 bar (abs)
• Certification: Intrinsically safe (Ex i), suitable for zone 0/20 (ATEX, IECEx) and FM approved for classes I, II, III, division 1, groups A, B, C, D, E, F, and G, T4 (USA and Canada)
• Traceable calibration (certificate included)
• Availability: First deliveries scheduled for Q1 2027

Applications Across Various Industries

The DMP370 supports gas quality measurement and purity monitoring across a range of hazardous industrial environments, including:

• Hydrogen: Monitoring applications for hydrogen production and storage, fuel cells, and electrolyser outputs.
• Natural Gas and Biogas: Biogas upgrading to biomethane, biomethane injection into gas grids, and monitoring of gas infrastructure, including natural gas pipelines.
• Chemical and Industrial Processing: Synthetic fuels, including eSAF, methanol production, pharmaceuticals, electronics manufacturing, and oil and gas.
• Battery Manufacturing: Dry process applications where flammable carbon dust may be present.
• Compressed Air and Nitrogen: Monitoring moisture levels in inerting, purge gas, and hazardous environments.

Conclusion

With the introduction of the DMP370, Vaisala is poised to meet the growing need for reliable and continuous gas quality monitoring in hazardous environments. As hydrogen and renewable gas projects transition from pilot installations to full-scale industrial production, the demand for robust measurement solutions that enhance both process performance and safety in dangerous settings is more critical than ever. Antti Heikkilä, Vaisala’s Industrial Decarbonization Product Line Manager, emphasised the importance of the DMP370 in providing continuous dew point measurement in applications where explosion safety is paramount.