M5-SRN Slide Rule Nomograph – English or Metric

The M5-SRN Slide Rule Nomograph is the low tech but proven method for determining the basic isokinetic calculations for Method 5. Find ideal delta, ideal nozzle size, K factor, and more using English or Metric units. Batteries not included since they are never needed. (click on image to enlarge)


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The M5-SRN is a manual slide rule nomograph for determining proper nozzle size and isokinetic sampling rate.