Use Indigo brand 0-1000ppm chlorine test strips, when you have to meet strict government regulations for food preparation & handling on cruise ships or seniors' homes. Only $15.95 per 100 strips, discounts for 10+.
Use our free Chlorine Bleach Dilution Calculator to take out the guesswork.
You can use our bleach dilution calculator to correctly calculate the amount of bleach & water needed to prepare the ppm levels indicated above. This calculator will allow for any concentration of chlorine bleach to be used to prepare a sanitizing/disinfecting solution. Watch the video:
In the case of cruise ships, food borne illnesses could spread rapidly because of the relatively crowded conditions and overwhelm on board health care facilities. These high level, 1000ppm (0.1%) chlorine test strips will determine in seconds whether your chlorine bleach solutions are at the higher strengths required.
Simply dip a strip into the bleach solution, ensuring that the small indicator pad is fully immersed for a few moments. Withdraw the strip and compare to the color chart on the pack for immediate, accurate readings.
The following table shows how much bleach is needed to make up different concentrations of disinfectant based on an initial concentration of 5% (most store bought bleach sold in North America is rated at 5.25% but loses strength with time).
|Amount of 5% Chlorine Bleach to Make Final Volume|
|~1.25 (1/4tsp)||~2.5 (1/2tsp)||~5 (1tsp)||~25 (1 fl. oz.)|
|5||10||20||100ml (US Quart)|
|190||380||760||3.8L (US Gal.)|
You can view the structure of the chemical indicator for this strip by clicking on: 3,3’,5,5’ – tetramethylbenzidine.
Here is a brief note from the Center for Disease Control on how to reduce the risk of getting a norovirus based illness on cruise ships, in nursing homes, daycare of schools.