Humidity/Vapor Detection

  • Chlorophenol Red (CPR) test paper is useful in differentiating between a solution with an acidic pH and one with a more neutral pH. The unreacted paper is yellow/orange in color. At neutral pH (about 6.7) the paper will turn a reddish color. At higher pH values, the paper will turn more violet. Given that the paper starts out yellow/orange and turns red at roughly the pH of water, it is useful in finding water leaks.
  • The Ammonia Leak Detection Cloth is used for the detection of leaks in sealed incubators, such as those used for infectious disease studies and in the treatment of premature birth. Industrial uses for detection of ammonia gas include sealed containers and filtration systems.  The cloth is sensitive to vapors from a 1% solution of Ammonia. The Ammonia Leak Detection Cloth is reversible. As long as the cloth reverts back to the original goldenrod yellow color, it will continue to change when exposed to ammonia vapors. However, we aren’t certain of how many times it can be reused (it is somewhat dependent on the use). Eventually, it will not revert back to its original color and can no longer be reused. It works best if exposed to vapors. If the cloth gets wet, it will not be reusable.
  • Our Cobalt Chloride cloth detects the presence of moisture to determine if you have wetness or dampness problems. The Cobalt Chloride Cloth can be cut into smaller pieces or draped over equipment. It is a fast and easy way to identify leaks in larger spaces, such as roofs, between walls, inside car doors or under ceramic tiles. The larger cloth allows for identification of spray or leak patterns when left in enclosed spaces. The Cobalt chloride cloth is responsive to 50% relative humidity and above, and any direct measure of an aqueous solution.
  • 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 8” x 10” (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.
  • The Humidity test strip contains 4 test pads with a blue indicator, which is discolored to a pinkish color according to relative moisture in the air. The process is reversible (i.e. the pads revert back to their original blue color). The test strip responds to the relative atmospheric humidity in the range of 20% - 80%, in the steps of 20 – 40 – 60 – 80%.
  • The Phenolphthalein test paper is sensitive to Ammonia Vapors, and thus is used to detect Ammonia leaks, for example, in refrigerators or air conditioners. Phenolphthalein detects Ammonia in solution from 3 – 5ppm. The test strip will turn a pinkish color if Ammonia is detected.

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