Our Cobalt Chloride test paper detects the presence of moisture. This test paper is useful in difficult to reach places and recesses. Cobalt chloride test paper is responsive to 50% relative humidity and above, and any direct measure of an aqueous solution.

Cobalt Chloride test paper is also available in 200x250mm sheets (or larger sizes if special-ordered). Larger sheets allow for identification of spray or leak patterns when left in enclosed spaces. Please call for details on special orders as minimum quantities do apply.

Instructions:
Place the test strip or sheet near recesses or areas where there may be cracks/leaks.
If moisture is present, the test paper will turn from blue to a light pink/white colour.
NOTE: Be sure to keep the strips sealed tightly in the vial, as exposure to 55 percent relative humidity or greater is sufficient enough to cause a slow color change. In addition, if the sheets are heated or the surrounding air dries, the paper will change back to its original blue colour.