COD Digestion Tube
Product Code : EL-TT-10178
Quick answer: A COD Digestion Tube is a thick-walled borosilicate glass tube used in Chemical Oxygen Demand (COD) digestion — heating a water sample with reagents in a COD digester block to measure organic pollutant load. Lab Glassware Manufacturer supplies these tubes in two sizes, 26 x 205mm and 39 x 205mm, to match common digester block formats.
COD Digestion Tube — Specification
| Parameter | Specification |
|---|---|
| Material | Thick-walled borosilicate glass, mechanically resistant |
| Application | COD (Chemical Oxygen Demand) disintegration / digestion |
| Size 1 (O.D. x Length) | 26 x 205 mm |
| Size 2 (O.D. x Length) | 39 x 205 mm |
Why Wall Thickness Matters for COD Digestion
COD digestion heats a sample with strong oxidizing reagents at high temperature in a digester block, so the tube needs to withstand both thermal stress and chemical attack repeatedly across test runs. A thick-walled borosilicate construction is specified for this reason. Confirm which of the two O.D. sizes matches the digester block in use, since COD tubes are made to a specific block's well diameter and are not universally interchangeable.
Frequently Asked Questions
What is a COD Digestion Tube used for?
It is used in Chemical Oxygen Demand (COD) digestion, where a water sample is heated with reagents in a digester block to measure organic pollutant load — a standard water and wastewater quality test.
What material is this tube made from?
It is made from thick-walled borosilicate glass, mechanically resistant to withstand repeated heating and chemical exposure during digestion.
What sizes are available?
Two sizes are available: 26 x 205mm and 39 x 205mm (O.D. x length). Confirm which matches your digester block before ordering.
Related Products
Other specialised test tube formats from Lab Glassware Manufacturer: Reusable Test Tube, Distilling Receiver, and the full Test Tube range under Laboratory Test Tubes.
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Last updated: September 2026.