Shaving Razors

SKU: 33815-1000

$15.95USD or lower Each

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[5]   7 Reviews    | Write a Review

Buy Indigo® brand 0-1000ppm chlorine test strips to meet government sanitizing regulations for intermediate level, semi-critical sanitizing, only $15.95 /100 strips;

Buy more & save with our 3 year shelf life. Indigo® 1000ppm free (available) chlorine test strips are easy to use. Just dip & compare to the color chart & you'll know in seconds if you're meeting the strictest safety standards.

Full documentation including Certificate of Analysis, Stability & SDS are available below. Be prepared for any health & safety audit or inspection.


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.

Related information or images
Immediate results with readings at 50, 100, 250, 500, 1000 ppm for free (available: HOCl & OCl-) chlorine bleach concentration. The detection limit of this strip is 25 ppm.
  • Indigo™ test strips have a guaranteed minimum 3 year shelf life but are stored in desiccant lined vials so actual shelf life can be 5+ years.
  • For technical explanation, read: Sanitizer Test Strip Expiration; Good Today, Dead Tomorrow?
  • These strips measure free (available) chlorine
  • The number of strips (100) per vial is approximate.

Test Strip Documentation

Stability Statement Certificate of Analysis SDS Calibration Fluid CoA
Indigo Chlorine 1000ppm Test Strip Stability Statement Indigo Chlorine 1000ppm Test Strip Certificate of Analysis Indigo Chlorine 1000ppm Test Strip SDS Calibration Fluid Certificate of Analysis


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 Sanitizer 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.


Amount of 5% Chlorine Bleach to Make Final Volume
250 (ppm)
ml Bleach
500 (ppm)
ml Bleach
1000 (ppm)
ml Bleach
Volume (mL)
1.25 2.5 5 250 (~1 cup)
2.5 5 10 500 (~2 cups)
5 10 20 1000 (~US Quart)
19 38 76 3.8L (US Gal.)

Indigo® brand chlorine test strips are Made in USA & tested for accuracy using NIST compliant standards.

Reviews (7)

Good prices and range of products. Great customer service and glad to support a Canadian business


Great quality strips, price, and fast delivery!

— Laurie
Ordered a few different testing strips. I was very happy with the quality, shipping and customer service. The price was also great and the detailed descriptions on the products made the ordering process super fast which I truly appreciate. Will be ordering again.

Have passed on the name of the company to others looking for the same product. Great customer service and price

— Jessica
— Indigo:

Passing along our name is the highest level of endorsement. Much appreciated.

Great company to work with. They emailed straight away to let me know when it was going to be delivered and any delays. Good pricing and in stock. Will use them again.
— Julie

After searching online for 1000 ppm test strips, I found these at Indigo Instruments, and they were exactly what I needed, plus very reasonably priced! In an era where it is hard to find good customer service, I was pleasantly surprised when Chris answered all my questions, and made sure the product I ordered was what I was looking for! He was super helpful and knowledgeable. We received the product quickly and would not hesitate to order from Indigo again. Thanks, Indigo!

— Nancy
— Indigo:

Glad we could help. Perhaps our greatest strength is that eveyone handling customer inquiries has a science degree. 

Indigo Instruments was great to work with. My package arrived in a timely matter and they contacted me following my delivery to make sure everything made it okay. I am very please with my service from this company.
— Taiya
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