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.

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

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.

Great product, but those geniuses at Amazon covered the color comparison chart with their inventory sticker which was difficult to remove and left a sticky residue that makes the color chart difficult to read or trust