Whirl-Pak® Coli-Test Bag

SKU: E-WPB-CT Categories: , ,


Ideal for testing water samples with colour-changing reagents for Total Coliforms and E.Coli. Convenient and sterilised, ready for immediate use, this bag can be used in place of the expensive bottle currently used.

The Coli-Test bag has been accepted by the EPA and is listed in the EPA Manual for the Certification of Laboratories Analyzing Drinking Water Section, 5th edition, January 2005.


  • The bag is made of a special barrier film suitable for use with enzyme-based methods that result in a chromogen and / or a fluorogen release when Total Coliforms and E. coli are present
  • The special film prevents color change from permeating through the bag, contaminating another sample and creating a false positive and making contact with a person’s skin if they are not wearing gloves
  • Bags are sterile and contain 10 mg of active sodium thiosulfate to neutralize chlorine
  • They have 100 ml fill lines and are completely self-standing
  • If the sample is not chlorinated, this bag can still be used; the sodium thiosulfate will not affect the sample, it is nontoxic, non-nutritive and only neutralise chlorine if present.
  • A free color comparator is included in every box
  • The Coli-Test bag will save money three ways: less expensive than the bottle, lower freight charges, and reduced disposal costs


100 ml capacity – 7.5 x 18.5 cm.

Box of 100

NOTE: The colour-changing reagent is not included.

Additional information

Weight 0.00 kg