The WDG-IVM analyzer measures oxygen, combustibles and methane in natural gas-fired applications. It is ideal for gas-fired power boilers or for those using natural gas during start-up and shutdown. With this analyzer, you can monitor oxygen and combustibles for maximum fuel efficiency. In addition, the methane detector can be used for purge and lightoff cycles during start-up and shutdown. Available with Series 2000 controller or integrated /IQ electronics.

  • Weatherproof, stainless steel sensor enclosure
  • Zirconium oxide oxygen cell
  • 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
  • Requires handheld or wall-mount IQ Link
  • HART option available
  • UL Listed, CE Compliant

Some applications use the flue gas not only to generate heat, but also to alter the properties of the product exposed to it. Here fuel efficiency is not as important as the oxidizing or reducing properties of the flue gas. This is called heat treatment and is used on many metals, ceramics, glasses and other materials. By adjusting the air/fuel ratio to the burner, the flue gas is controlled to be as oxidizing or reducing as needed. The exact air-to-fuel ratio which gives theoretically perfect combustion is called stoichiometric. Using more air than the stoichiometric amount creates an oxidizing effect; less air than stoichiometric creates a reducing effect. This latter condition is known as substoichiometric (other terms include excess fuel, reducing or Lambda <1) and can be used to alter the physical properties of products or to prevent the formation of NOx. For example, reducing conditions are necessary to make colored glass. In some applications, such as bright annealing, a highly reducing atmosphere is required, but the product would be damaged by carbon-containing gases so a flue gas from fossil fuels cannot be used. In such cases a mixture of nitrogen and hydrogen (or cracked ammonia) is commonly used. It is easier and less expensive to use a flue gas as the furnace atmosphere whenever possible. THERMOX XS Fuel software allows the zirconium oxide cell to follow sub-stoichiometric as well as oxidizing atmospheres.

In the following applications it may sometimes be desirable to run sub-stoichiometrically and to have some way of knowing at all times how oxidizing or reducing the process is:

  • Heat treatment of metals
  • Wire manufacturing
  • Heat treatment of ceramics and porcelains
  • Primary stage of a thermal oxidizer (incinerator)
  • Manufacture of specialty glass, e.g. colored glass
  • Primary stage of a low NOx burner
  • Specifications +

    See the Documentation tab for details regarding specifications on this product.

  • Documents +

  • Certifications +

    Refer to the Product Data Sheets in the Documentation tab to see the applicable certifications for this product.