--- title: What size auger bit should I use when installing root tubes for use with the CI-600/602? description: What size auger bit should I use when installing root tubes? --- [Skip to content](https://knowledgebase.cid-inc.com/what-size-auger-bit-should-i-use-when-installing-root-tubes#main-content) English Show submenu for translations [![CID green](https://knowledgebase.cid-inc.com/hs-fs/hubfs/CID%20green.png?width=350&height=77&name=CID%20green.png)](https://knowledgebase.cid-inc.com/?hsLang=en) Open main navigation Close main navigation - English Show submenu for translations - [Submit a Support Ticket](https://cid-inc.com/plant-science-tools/leaf-area-measurement/ci-110-plant-canopy-imager/support/#SubmitaTicket) [Submit a Support Ticket](https://cid-inc.com/plant-science-tools/leaf-area-measurement/ci-110-plant-canopy-imager/support/#SubmitaTicket) How can we help you? - There are no suggestions because the search field is empty. 1. [CID Knowledge Base](https://knowledgebase.cid-inc.com/?hsLang=en) 2. [Root Analysis](https://knowledgebase.cid-inc.com/root-analysis?hsLang=en) # What size auger bit should I use when installing root tubes for use with the CI-600/602? **For the CI-600** **In-Situ Root Imager,** we recommend a 3” (inch) diameter auger bit with two extension pieces for drilling holes to accommodate the 2.75” outer diameter of the CI-600 tubes. **For the CI-602** **Narrow Gauge Root Imager**, a 2.5" auger bit with two extension pieces is recommended for the 2.25" outer diameter of the 105 cm length CI-602 tubes. When using the earthquake auger, brace the auger to steady the bit and to ensure that the angle of the holes for each tube placement is consistent.The hole created by the auger should be just larger than the tube to minimize the airspace around the tube exterior. With excess space, created by an unsteady auger bit, air pockets can occur between the tube and the soil, which will be visible in the root image and may lead to excess condensation on the exterior of the root tube. It is best to limit the space between tube exterior and soil wall to 8mm, or 0.3". - [Root Analysis](https://knowledgebase.cid-inc.com/root-analysis?hsLang=en#main-content) - [CI-602 Narrow Gauge Root Imager](https://knowledgebase.cid-inc.com/root-analysis?hsLang=en#ci-602-narrow-gauge-root-imager) - [CI-600 In-Situ Root Imager](https://knowledgebase.cid-inc.com/root-analysis?hsLang=en#ci-600-in-situ-root-imager) - [Canopy Analysis CI-110P](https://knowledgebase.cid-inc.com/canopy-analysis-ci-110p?hsLang=en#main-content) - [CI-110 Plant Canopy Imager](https://knowledgebase.cid-inc.com/canopy-analysis-ci-110p?hsLang=en#ci-110-plant-canopy-imager) - [Photosynthesis Analysis CI-340](https://knowledgebase.cid-inc.com/photosynthesis-analysis-ci-340?hsLang=en#main-content) - [CI-340 Handheld Photosynthesis System](https://knowledgebase.cid-inc.com/photosynthesis-analysis-ci-340?hsLang=en#ci-340-handheld-photosynthesis-system) - [Leaf Analysis CI-202/203/710s](https://knowledgebase.cid-inc.com/leaf-analysis-ci-202-203-710s?hsLang=en#main-content) - [CI-710s SpectraVue Leaf Spectrometer](https://knowledgebase.cid-inc.com/leaf-analysis-ci-202-203-710s?hsLang=en#ci-710s-spectravue-leaf-spectrometer) - [CI-203 Handheld Laser Leaf Area Meter](https://knowledgebase.cid-inc.com/leaf-analysis-ci-202-203-710s?hsLang=en#ci-203-handheld-laser-leaf-area-meter) - [CI-202 Portable Laser Leaf Area Meter](https://knowledgebase.cid-inc.com/leaf-analysis-ci-202-203-710s?hsLang=en#ci-202-portable-laser-leaf-area-meter) - [Software](https://knowledgebase.cid-inc.com/software?hsLang=en#main-content) - [Rootsnap!](https://knowledgebase.cid-inc.com/software?hsLang=en#rootsnap) [![felix logo 8-15-2019 transparent-1](https://knowledgebase.cid-inc.com/hs-fs/hubfs/felix%20logo%208-15-2019%20transparent-1.png?width=150&height=92&name=felix%20logo%208-15-2019%20transparent-1.png "felix logo 8-15-2019 transparent-1")](https://knowledgebase.cid-inc.com/?hsLang=en) 123 Waverly Pl., Boston, MA 02135 [mailto:sales@cid-inc.com](mailto:sales@cid-inc.com) Copyright © 2024, CID Bio-Science