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Waterloo, ON, N2J 4R9


US Address:

Niagara Falls, NY 14305

Canadian/International ship from Waterloo; US orders from Buffalo, NY.

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Chlorine Test Strips, 2000ppm, 100/Pk

Daycare regulations in many jurisdictions require tests for both sanitizing & disinfecting solutions; these 0-2000ppm chlorine strips can measure both.

Read our blog Nasty Norovirus a useful read & why doing dilutions correctly is important.

SKU: 33815-2000
Chlorine Test Strips; Childcare, 0-2000ppm, ~100 strips/pack

PRICE BREAKS - The more you buy, the more you save.
Quantity1+2+ 3+ 10+ 
Price for each$19.00USD$18.50USD$18.00USD$17.50USD
Your savings- 2.63%5.26%7.89%

Quantity :

The color chart has ranges for sanitization (50-200ppm) & disinfection (500-800ppm). 800ppm is considered the maximum level for child safety in the event of ingestion. 

You can use our 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 but in this instance the video shows an 8.25% solution diluted to produce 650ppm (the midway point of 500-800ppm for disinfection as shown on the color chart).

You may also want to look at the following 2 pdf files from the State of California for "Sanitize Safely & Effectively" & "What is Safe & Effective Use of Bleach"

Note(1): If vial is properly stoppered, strips have a 2 year shelf life.

Note(2): These strips measure free (available) chlorine

Note(3): The number of strips per pack or vial is approximate.

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).

  1. Choose a container large enough to hold the final amount of diluted bleach you want to make.
  2. Measure & pour into the container the amount of 5% (initial) chlorine bleach you need.
  3. Fill the container with water to the level of the Final Volume.
  4. For concentrations other than 5%, use our Dilution Calculator to determine what you need.
  5. If you are unfamiliar with millilitres (mL), you can use this Metric to American volume converter.
  6. If you don't have the exact measuring tool, round up not down. i.e. for 47.5ml use a 1/4 cup.

Amount of 5% Chlorine Bleach to Make Final Volume
50 (ppm)
ml Bleach
200 (ppm)
ml Bleach
500 (ppm)
ml Bleach
800 (ppm)
ml Bleach
Volume (ml)
0.25 1 2.5 4 250ml
1 4 10 16 1000ml
4 16 40 64 4000ml
0.23 0.9 2.25 3.6 225ml (US cup)
0.95 3.8 9.5 15.2 950ml (US Quart)
3.8 15.2 38 60.8 3.8L (US Gal.)

  1. Note: If vial is properly stoppered, strips have a 2 year shelf life.
  2. Note: These strips measure free (available) chlorine
  3. Note: The number of strips per pack or vial is approximate.

You can view the structure of the chemical indicator for this strip by clicking on: 3,3’,5,5’ – tetramethylbenzidine.

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