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UEi Test Instruments C85 EOS - Reviews?

GregBl Member Posts: 16
Considering buying a UEi Test Instruments C85 EOS combustion analyzer for #2 heating oil. Please let me know if you have any experience with this analyzer. Thank you!


  • STEVEusaPA
    STEVEusaPA Member Posts: 6,128
    Not your best choice. No NOX filter. I have the C155, now used as back up, and currently use the Bacharach Insight Plus.
  • GregBl
    GregBl Member Posts: 16
    Thanks for the input.
  • ced48
    ced48 Member Posts: 469
    You can add a NOX filter for $40, or less-
  • GregBl
    GregBl Member Posts: 16
    ced48 - thanks for the feedback. I ended up going with Fieldpiece equipment (SOX3, SCM4 and SDMN5). However, they don't recommend using the CO for direct flue measurements. From what I've read, the missing NOx filter is probably the reason. I'm going to call them to discuss. BTW - where can I get a NOx filter for $40 or less (I've only found them for $50 and up)?