Thermal conductivity, specific heat and relative density of various gases can be measured based on a micro-thermal CMOS sensor, in combination with a critical nozzle and a switching valve. The device determines amongst others the superior calorific value, methane number and Wobbe Index from these values.

• Combustion-free measurement
• No carrier or auxiliary gas required
• No recalibration required
• Suitable for combustion gases with superior calorific value from 28 to 50 MJ/m³
• Accuracy (Hs,n) < ± 1 MJ/m³
• Measuring cycle time: approx. 30 seconds
• Output signal: Modbus-RTU
• Intrinsically safe, applicable in Ex zone 1
• Optionally on mounting plate or in plastic case