Acid/Alkaline Strips pH 4.5-10

SKU: 33811-4510

$11.50USD or lower Each

Save More When You Buy More!
Quantity1+2+ 3+ 10+ 100+ 
Price for each$11.50USD$11.27USD$11.04USD$10.35USD$9.20USD
Your savings - 2%4%10%20%
[5]   4 Reviews    | Write a Review

Indigo™ pH 4.5-10 test strips are ideal for accurate measurement of most foods & drinks as well as urine & saliva. Only $11.50/100 strips. 

Typical shelf life of 5 years or more if kept sealed even after opening. The 1 strip for all your health concerns.


pH 4.5-10 triple pad test strips are good for enhanced pH verification. Use them for saliva, urine and science fair demonstrations where resolution is needed for a narrow range than the 1-14 range. This can be very handy when testing different foods and drinks which occur mostly in this range.

The 3 test pads give 0.5 pH resolution and with practice, one can estimate 0.25 pH intervals. See some of the examples below.

The pads on an unused strip are calibrated at ~pH 5.75. Changes can be subtle & appear different under fluorescent, incandescent or sunlight. So, experiments done in the kitchen might appear a bit different when repeated in a school gymnasium.



Test Strip Documentation

Stability Statement Certificate of Analysis
Reviews (4)
I have been using Indigo Instruments test strips around 10 years now. Before I found them I think I have tested maybe 15-20 different test equipment and have found that Indigo test strips are way superior to any and all the other test strips I have tried. Usually fast delivery I am in California and I have them 3-4 days in the mailbox.
— Swede
Better sensitivity (0.5 units) than typical pH paper. Provides accurate results without the need for electronic pH tools in difficult environments for electronics. And NO calibration needed.
— Doug
I discovered this company accidentally many years ago when I was seriously ill with no diagnosis. I used the pH strips to double check the medicinal test strips I had bought in order to diagnose myself. At first I bought only a bag of test strips; now they all come in a plastic box. The quality is very good; the tests are reliable; the strips last for over a year. The company ships immediately, and the product arrives to Norway in just a few days. I once sent an enquiry about the pH in drinking water (low due to acid rain), and I had an email discussion with a professional who works with the company. All in all, I consider Indigo a serious and professional website, and the pH tests of high quality.
— Efficiency and reliability at affordable costs
This PH scale is extraordinary. Very precise. Indigo's customer service is excellent. Very accommodating, attentive and prompt in their advice. Always a pleasure to order Indigo Instruments.
— LEMIEUX, Geneviève
Review This Product Now!