5920040 pHydrion 9800 Plastic pH Indicator Strips, 0.0 to 14.0, flip top Vial Packaging

Wonderful quality and accurate reads! The value for the price is great as well. Easy to read with accurate color and PH read!

So far these are the easiest and most accurate strips I've used for urine and saliva ph testing. Tried two other brands.

Did not work. I tested several different substances with different pH levels (including distilled water which should always register 7.0), and the test strips never changed color.

Saw the scale on the outside of the bottle and could figure it out without even using them.So I didn't use them yet.

Now I can make several tests I need for science projects.

The color scale is easy to read.

I used these strips with the high school chemistry class I teach. They measured pH accurately for solutions I made of pH 0-3 and 11-14 (using HCl and NaOH), but tended to read right around pH 6-7 for anything else. Unfortunately, this made them unusable, as student results were wildly off.

Faulty product, strips always read yellow & beige no matter how much PH level is , not only it cost me $54 of wasted PH up additives but I had to drain and refill the pool due to its reading errors Avoid it