Model WDG-IV Series Analyzers



The THERMOX Model WDG-IV analyzers measure oxygen, combustibles and methane in natural gas-fired applications. They are ideal for gas-fired power boilers or for boilers using natural gas during start-up and shutdown. With these analyzers, you can monitor oxygen and combustibles for maximum fuel efficiency. Available with Series 2000 controller. This analyzer has a close-coupled extractive design for fast response in a wide range of flue gas applications up to 3000°F (1648°C).


  • Weatherproof, stainless steel sensor enclosure
  • Zirconium oxide oxygen cell
  • Catalytic Combustibles detector for 0-2000 ppm
  • Catalytic Methane detector for 0-5%
  • Class I, Div. 2 or Class I, Div. 1 option
  • Two isolated current outputs
  • Four alarms
  • Diagnostics
  • RS-485
  • HART option available
  • UL Listed