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Sonde HOFI

Hot extractive Stack gas sampling system

Gas sampling system to be connected to heated analyzers( e.g. MIR FT )



  • Municipal waste incinerators
  • Hazardous waste incinerators
  • Combustion plants
  • Petrochemical industries
  • Cement plants
  • Glass plants
  • Paper mills


  • Double filtration stage
  • Heated filter
  • Direct injection of span gas on tip of the probe
  • Automatic back flush for a reduced maintenance
  • Transfer of the sample gas via heated line (180°C)
  • Large selection of sampling probes according to the process conditions (stack diameter, gas temperature and moisture, particulate content)
  • Optional stack gas temperature and flow rate sensors wih no additional flange







  • Coarse filter: 20 µm (according to probe type)
  • Fine filter: 0.5 µm
  • Probe temperature: programmable from 100°c to 250°C
  • HOFI heated filter temperature: 180°C
  • Sample flow rate: 60 to 120 l/h
  • Dimensions: 400x600x200 mm (WxHxD)
  • Weight: 15 kg (IP55 tight box)
  • Power supply: 230 V/50Hz or 110V/50-60Hz
  • Consumption: approx. 400 VA
  • Operating temperature: -20°C to + 40°C
  • Flange: DN100/PN20 (others upon request)