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High Accuracy pH Test Paper

Make accurate, reliable pH measurements of urine, saliva, juice, and more in just seconds.

• ~50 test strips per pack
• easy to read color chart
• white backing for good contrast comparison
• stiff plastic; good for dipping into tubes

1. 2+ year shelf life if kept sealed & out of direct sunlight
2. No known interfering substances but deeply colored solutions can cause inaccurate readings
3. Dip strip for several seconds for reaction to take place
4. Compare strip to color chart
5. (Papers are non-bleeding so can be dipped for several minutes)

pH: Acid & Base Indicator

The 1-14 range pH acid and base indicator strips are great for general science fair experiments as an economical "all-in-one strip. You can test many liquids and it is especially useful if you are not sure where to start. This triple pad version gives 3 reference points for extra assurance. If you are doing specific experiments such those involving water, narrow range strips are better.

pH 5.5-8.0 test strips measure just above and below pH 7.0 (neutral) and are great for people interested in urine and saliva since they measure in 0.5 pH steps. The pH 5-9 strips, only measure in 1 pH step which is more than enough if you are testing alkaline and ionized water and just want to be sure these products are not past their shelf life.

Note: If you are mainly interested in food, be sure to visit the US government FDA site for the pH of many different foods.

Click on images for specs.; on "Each" for quantity discounts.
pH 1-14	pH 5-9	pH 5.5-8
Science Fair Experiments Acid-Base pH Factors 1-14	Alkaline/Ionized Water Acid-Base Test Strips	Body Health: Urine, Saliva Acid-Base pH Levels

pH Acid Indicator Only

pH acid indicators are used for determining the pH level of common materials such as vinegar, lemon juice, battery acid and even yeast infections.

Click on images for specs.; on "Each" for quantity discounts.
pH 0-2.5	pH 3-6	pH 4-7
Lemon Vinegar Strong Acid pH Level Test	Yeast Infection Tomato Juice Acid pH Factor Testing Paper	Water, Urine Saliva, Milk Mildly Acidic pH Indicators

pH Basic Indicator Papers Only

pH basic papers measure the pH level of alkaline solutions such as lye, milk of magnesia and ammonia.

Click on images for specs.; on "Each" for quantity discounts.
pH 7-10	pH 10-13
"Hard" Water Baking Soda pH Test Paper	Bleach Milk of Magnesia pH Testing Paper

Here is a pretty extensive list of: naturally occurring pH indicators that include plants, household chemicals & more. A great idea for science fair & just general interest.

Click here for more information on the pH scale and some examples of different materials.

Advanced users might be interested in a computer based pH calculator.