
Calorimeter
CWD HT
The CWD HT is a specialized combustion calorimeter designed for the direct and continuous determination of gas quality in gases with high moisture content. As part of the CWD series – Calorimetry, Wobbe Index and Specific Gravity – it provides reliable measurement of key gas quality parameters, including calorific and heating value, Wobbe index, specific density, and CARI (air requirement).
The CWD HT has been specifically developed for the analysis of moist gases with dew points of up to 60 °C, making it particularly suitable for challenging applications such as wood gasification and other processes involving hot, moisture-rich gases.
To prevent condensation and ensure stable measurement conditions, the right-hand chamber of the system is heated to 65 °C. This temperature-controlled design enables reliable gas analysis even at high moisture levels while maintaining continuous and precise monitoring of the relevant gas quality parameters.
With its specialized thermal design and continuous measurement capability, the CWD HT provides a robust solution for industrial applications where conventional gas analysis systems may be limited by high gas moisture content.
The CWD product series in comparison

CWD BASIC
Reliable measurement of calorific
and heating value as well as Wobbe index

CWD PLUS
Continuous, highly accurate determination of the Wobbe index

CWD DPC
for use in accordance with Class I Division 2, Groups B, C, D, T4

CWD SPC
Reliable, reproducible measured values in real time for optimum monitoring

CWD EXP
Safe shutdown with changing gas composition Gas composition

CWD HT
The new CWD for precise measured values in the high temperature range
Industry applications
These products can be used in the following sectors.

Iron and steel production
Our appliance series have been used in iron and steel production for many decades.

Biogas
Union Instruments products have proven themselves extensively in biogas upgrading plants.

Petrochemicals and refineries
We produce customized and flexible measurement technology solutions for the petrochemical industry and refineries.

Glass and ceramics
Perfectly coordinated appliance technology for glass and ceramic applications that works both safely and economically.

Natural gas
Our INCA multi-gas analyzers provide efficient solutions for processes in natural gas plants.

Generating energy from waste
Our appliance technology makes an important contribution to the functionality of environmentally friendly and energy-saving system concepts.
Service
We clarify administrative and commercial issues for you.
+49 721 680381-30
Support
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Distribution
We prepare quotations for you, clarify questions about invoicing and manage your maintenance contract.
+49 721 680381-20
Downloads
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Brochures, data sheets and application reports – we have all the relevant information for you here.
Industries
Our key application areas at a glance.
We supply a wide range of industrial plants such as steel production, the natural gas industry and biogas producers.
Products
Special products for your industrial application.
Our range includes the INCA, CWD and SIRA product series and the CAM module – combined with top advice and service.