---
title: What is the recommended sampling duration when using Micro-5 cassettes?
description: What is the recommended sampling duration when using Micro-5 cassettes?
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# What is the recommended sampling duration when using Micro-5 cassettes?

| The sampling time is dependent on the density of particulate in the environment. It is important not to overload the sample, otherwise it will be impossible to accurately count the types of spores, pollen or other particulates that are present. The following list represents typical sample times to attain a sharply defined trace with good dispersion of the spores:  Sampling Duration  • Outdoor / Indoor Clean Environments = 8-10 minutes  • Indoor (Normal Activity) = 5 minutes  • Indoor (Heavy Particulates) = 1-3 minutes  • Inner wall cavity using the Micro5 only  (with optional InnerWall Adapter, Product ID 8715901) = 1-2 minutes |
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