---
title: How do I stabilize my photosynthesis measurements?
description: How do I stabilize my photosynthesis measurements?
---

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1. [CID Knowledge Base](https://knowledgebase.cid-inc.com/?hsLang=en)
2. [Photosynthesis Analysis CI-340](https://knowledgebase.cid-inc.com/photosynthesis-analysis-ci-340?hsLang=en)
3. [CI-340 Handheld Photosynthesis System](https://knowledgebase.cid-inc.com/photosynthesis-analysis-ci-340?hsLang=en#ci-340-handheld-photosynthesis-system)

# How do I stabilize my photosynthesis measurements?

If you are experiencing unstable measurements from the CI-340, the most common cause is an unstable CO2 in source. Make sure you are using the filter and tubing on the intake of the instrument to get the intake away from human respiration or other varying sources of CO2. Alternatively, use a buffer system for your CO2 intake. See “How Do I Make a Buffer Tank System?” FAQ for more information on this process.

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