Vaisala DMP370: To Seek Dew Points in Hydrogen, Biomethane and Industrial Gas Infrastructure

It’s called Vaisala DMP370 Intrinsically Safe Dew Point Instrument for hazardous locations and it’s the extension of DRYCAP dew point technology. It’s entirely a technological innovation by Vaisala, a Finnish company that is global leader in measurement instruments and intelligence.

Announced at Gastech 2026 in Bangkok, the world’s largest exhibition and conference for natural gas, LNG, low carbon solutions, and energy innovation, 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.

Fighting Moisture

According to the International Energy Agency’s Global Hydrogen Review 2026, global hydrogen demand surpassed 100 million tonnes already in 2025. Much of this demand comes from industrial processes where gas quality directly affects safety, equipment performance, and operational reliability. 

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.

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.

Vaisala DRYCAP 

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.

“As hydrogen and renewable gas projects move from pilot installations to full-scale industrial operations, the need for reliable, continuous gas-quality monitoring is growing. Operators need measurement solutions that support both process performance and safety in hazardous locations,” said Antti Heikkilä, Product Line Manager of Industrial Decarbonization at Vaisala.

“With the DMP370, we’re bringing Vaisala’s proven DRYCAP measurement technology into hazardous locations, enabling continuous dew point measurement in applications where explosion safety is essential,” he added.

Features

• Product: Vaisala DMP370 Intrinsically Safe Dew Point Instrument
• Configuration: Vaisala’s DMP37X probe + HMT370EX transmitter, certified as a single intrinsically safe unit
• Technology: Vaisala DRYCAP® dew point sensor with an innovative drift-compensation solution
• Measurement range:  -70°C … +10°C Td/f
• Measurement accuracy: ±2°C Td/f (typical)
• Temperature range: -40…+60°C
• Pressure range: 0…40 bar (abs)
• Intrinsically safe (Ex i), for up to Zone 0 / 20 (ATEX, IECEx)
• FM approved for Class I, II, III, Division 1, Groups A, B, C, D, E, F and G, T4 (US and Canada)
• Traceable calibration (certificate included)
• Availability: First deliveries begin Q1 2027
• Markets: Hydrogen, natural gas/biomethane, chemical and industrial processing, battery manufacturing, compressed air and nitrogen.

What Range of Hazardous Industrial Environments is the DMP370 Designed For?

• Hydrogen: hydrogen production, storage, fuel cell, and electrolyzer output monitoring applications.
• Natural gas and biomethane: biogas upgrading into biomethane, grid injection 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 combustible carbon dust may be present.
• Compressed air and nitrogen: inerting, purge gas and hazardous-location moisture monitoring.

What Kind of Company is Vaisala?

Founded in 1936 in the Finnish city of Vantaa, nearby the capital Helsinki, Vaisala is a global leader in measurement instruments and intelligence for climate action. With over 90 years of innovation and expertise, we employ a team of close to 2,500 experts, they manufacture more than 1 milion sensors every year.

Why Moisture Could Be a Problem?

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.