Indigo® test strips measure acids between pH0 to 7 strips for only $11.50/100 strips. They are ideal for strong acids with high pKa such as battery acid, HCl, sulfuric acid or even lemon juice as well as very weak acids near neutral ph7.
Typical shelf life of 5 years or more if kept sealed even after opening. The 1 strip for all your acid measuring & testing needs.
These strips are triple pad for enhanced reading accuracy. Compare all 3 pads to the color chart. The closest match of all three is the correct value. Only one or two of the 3 pads will change for any given acid level.
Test Strip Documentation
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I'm very pleased with products I ordered. Delivery was surprisingly fast. Customer service was great and my questions were answered quickly and thoroughly.
Glad we could help. For anyone curious about using triple pad pH strips, this explains further: How Do You Use a pH Test Strip?Â