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Measures carbon dioxide concentration in the grow room. To test, break the ends off one of the glass test tubs and insert it into the end of the syringe. Pull back the syringe to draw air through the tube. The tubes have a reagent inside that changes colors. The color change can be measured with the marks on the outside of the test tube that correspond to the concentration of carbon dioxide in the air. The tubes can be used once. The kit comes with two test tubes. Extra tubes sold separately.
Item Number: 241154
Universal Product Code: 711320200505