Indigo® test strips measure acids between pH 0 to 7 for only $13.75/100 strips. They are ideal for strong acids with high pKa such as battery acid, HCl, sulfuric acid or even lemon juice & vinegar. They will also test for for very weak acids near neutral ph7.
Typical shelf life of 3 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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Makes life so much simpler. Thank you.
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
Yes, concentrated sulfuric, hydrochloric and nitric acids are pH 0 but when slightly diluted can be pH 1. Those acids, along with citric acid are often diluted for use in acid pickling. Metal finishing or pickling uses an acid bath to treat metal surfaces in order to remove rust or scale. This acid cleaning process is also used in jewelry making to remove the copper oxide layer caused by soldering and annealing.