The 2640 CLIRcheck is a portable clearance device for SO2F2. Its main use is to check for residual gases after pest treatment with SO2F2. The device has been tested by the EPA (United States Environmental Protection Agency) and is listed on the label of "Douglas Products" as an approved clearance device. For portable residual gas detection applications, the 2640 CLIRcheck has the highest resolution currently available on the market. An optional accessory package consisting of the carrying case, a protective pouch with shoulder strap, a car charger and a free calibration is available on request.



  • Portable clearance device for SO2F2
  • Concentration range 0.5 - 100 ppm, resolution 0.5 ppm
  • Accuracy 1% of the measured value ± 0.5 ppm
  • Operating time more than 4 hours with one battery charge
  • Hose length up to 50 metres (with 4mm inner diameter)
  • Dimension: 23 x 10 x 22 cm, weight about 4.5 kg
  • Scope of delivery with input particle filter and charging power supply unit
  • Recommended calibration interval 24 months
  • Optional accessory package available (case, protective bag, car charger, free calibration)
  • Other gases/measuring ranges possible on request

Optional "Carefree-Package"

  • first recalibration free of charge (only calibration!)
  • car charger/power supply
  • carrying bag
  • transport case


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