Gas Quality Measuring Device GQS 400

For determination of superior calorific value, standard density and Wobbe index

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
Operating pressure
5.0 to 6.0 bar(a)
Gas consumption
Electrical connection
Power supply 10.5 to 36 VDC
Power requirement

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