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Would like info on Combustion Analyzers, gases measured, units, functions

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njwebdevguy
njwebdevguy Member Posts: 33
in Gas Heating
Hello,



Would some of you folks who have Combustion Analyzers be willing to post what gases they measure, what the range of values they measure, and what functions they execute with the info they collect. Also, would it be possible to leave a combustion analyzer in place as a permanent addition to a heating setup.



I'm gathering they have a probe which is inserted inline in the exhaust gas flow, (chimney/flue) etc. Are there any other points at which the analyzer does its analysis? (do they analyze air intake?)



I'm basically wondering whether its possible to build one and how much it would cost.



How are they calibrated? Do you use reference samples?

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  • njwebdevguy
    njwebdevguy Member Posts: 33
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    What's in a Combustion Analyzer? What does it measure?

    Would it be enough to measure O2, CO2, CO, and  (which? all?) of the following..



    "Natural Gas"

    LPG and propane

    butane

    methane

    H2

    Alcohol



    Then what kind of number crunching/display needs to be done?



    Thank you!
  • Tim McElwain
    Tim McElwain Member Posts: 4,621
    edited November 2011
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    If you go online

    to the various websites of the folks who make these you will get all the info you are asking for.



    Bacharach, Testo, Wohler, UEI, E Instruments, TSI are just some of the manufacturers.



    These all use a probe which must be placed in the flue connection  of the appliances. The probes include a thermocouple type sensor inside the probe for measuring flue gas temp. 



    The testers can be set for measuring



    Natural gas (methane)

    Propane (LP)

    Butane

    #2 oil

    #6 oil





    These testers are designed to measure flue gases and analyze them and give readings such as



    O2,



    Flue Temp,

     

    Carbon Monoxide diluted



    Carbon Monoxide air free (actual CO)



    CO2 which is actually not directly measured with a sensor but is a calculated reading done by the meter electronics.



    Efficiency same thing it is a calculated reading



    Draft in inches water column typically



    Some testers also measure nitrous oxide



    There are some very expensive instruments that are also available which are typically used on some commercial and industrial applications.
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