Phone: (519) 746-4761

Canadian Address:

169 Lexington Court, Unit I

Waterloo, ON, N2J 4R9


US Address:

Niagara Falls, NY 14305

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

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pH Test Strips Litmus Papers

Test science experiments, food, drink and more with Indigo pH litmus papers.

10 different pH/litmus test papers to get the reliable pH level results you need.

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Displaying 1 to 15 (of 15 products) Result Pages:  1 

How accurate are ph test strips?

  • Our pH test strips resolve acidity or alkalinity in steps of 0.5 or 1.0 pH unit.
  • For strips with step of 1.0 pH , the accuracy is +/- 0.4-0.5 pH unit.
  • For strips with step of 0.5 pH, the accuracy is +/- 0.2-0.25 pH unit.

Of course, making accurates measurements can depend in part in choosing the right pH strips

Litmus test papers give qualitative results; i.e. yes or no, acid or alkaline.
pH test strips are semi-quantitive. i.e. they tell you how much but with some uncertainty.
A pH meter is quantitative with some error.
Titration is quantitative and most accurate but is time consuming & can be expensive if done in a certified lab.