Zegaz Instruments manufactures state-of-the-art products for the measurement of hydrocarbon and/or water dew points. Designed for Natural Gas Pipelines, Refineries, Gas Storage, Gas Distribution, Biogas, City Gates, and Gas Power Plants. Their CEIRS™ technology is like no other on the market. Find out why dewpoint measurement is important here.

CEIRS™ Technology

CEIRS™ stands for “Chilled-Mirror Evanescent Infra-Red Spectroscopy” .  While it is still a first-principle chilled-mirror method, it uses infrared spectroscopy to unambiguously determine the onset of condensation at dew point temperatures.  Because of its spectroscopic nature, it can also separate out different dew points in gas mixtures.

In the natural gas context, it can detect both hydrocarbon and water dew points and distinguish them from each other and other potential contaminants.

Older technologies only use light reflection off of a metallic or glass surfaces to determine when dew point is reached.  The analyzers using these older techniques cannot distinguish between water and hydrocarbon dew points and are often subject to interference from other contaminants.

Zegas provides a first-principle chilled mirror measurement that is the standard for such measurement and complies with ASTM D1142, ISO 6327, and ISO/TR 11150.


Portable hydrocarbon and water dew point analyzer

Data Sheet |Video


On-Line Hydrocarbon Dew Point Analyzer

Data Sheet


On-Line Water DewPoint Analyzer

Data Sheet

DewPoint Duo™

On-Line Hydrocarbon and Water Dew Point Analyzer

Data Sheet

Z-TCE-500™ Heated Enclosures

Temperature Controlled Enclosure

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4420 Farm to Market 1960 Rd W Suite 116, Houston, TX 77068