pH Test Strips Litmus Papers

Choose from 10 different Indigo® pH & litmus strips, papers & sheets for all your acid & alkaline testing requirements at home or in the lab. Full documentation provided including a Stability Statement, Certificate of Analysis & SDS available on request). Optional next day delivery in any quantity of most items. Buy Indigo® test strips, the brand you can trust for accuracy & technical support. Call us on our toll free line for immediate assistance or e-mail us with your questions. 1 hour response is typical during business hours, M-F, slightly longer on weekends.

Indigo® pH & Litmus Strips

pH, the amount of acid or base in (mostly) aqueous solutions, is important in areas as diverse as health, food & water testing, electroplating and more. Choose specific strips depending on the accuracy you need over a narrow or wide range.

Displaying 1 to 14 (of 14 products)
Acid/Alkaline Strips pH 4.5-10

Acid/Alkaline Strips pH 4.5-10

SKU: 33811-4510
$11.50USD or lower Each
Acid/Base pH1-14 Strips 100/Pk

Acid/Base pH1-14 Strips 100/Pk

SKU: 33811-0114
$11.50USD or lower Each
Acid pH 0-7 Strips 100/Pack

Acid pH 0-7 Strips 100/Pack

SKU: 33811-0070
$11.50USD or lower Each
Alkaline pH 7-14 Strips 100/Pk

Alkaline pH 7-14 Strips 100/Pk

SKU: 33811-0714
$11.50USD or lower Each
50 Sushi/Salsa pH3-6 Strips

50 Sushi/Salsa pH3-6 Strips

SKU: 33812-3060
$5.95USD or lower Each
50 Maple Syrup pH 10-13 Strips

50 Maple Syrup pH 10-13 Strips

SKU: 33812-1013
$5.95USD or lower Each
300 Litmus & 1-14 pH Strips

300 Litmus & 1-14 pH Strips

SKU: 33811-Lit1
$14.95USD or lower Each
300 Litmus & 4.5-10 pH Strips

300 Litmus & 4.5-10 pH Strips

SKU: 33811-Lit2
$14.95USD or lower Each
2 Litmus+2 pH=400 Strips

2 Litmus+2 pH=400 Strips

SKU: 33811-Lit3
$25.95USD or lower Each
100 Blue Litmus Papers

100 Blue Litmus Papers

SKU: 33810-BV
$2.65USD or lower Each
100 Red Litmus Paper Strips

100 Red Litmus Paper Strips

SKU: 33810-RV
$2.65USD or lower Each
Red Litmus 8x10:200x250mm

Red Litmus 8x10:200x250mm

SKU: 33810-R8
$1.50USD or lower Each
Blue Litmus 8x10:200x250mm

Blue Litmus 8x10:200x250mm

SKU: 33810-B8
$1.50USD or lower Each
Universal pH 8x10" Paper

Universal pH 8x10" Paper

SKU: 33813-U8
$2.95USD or lower Each
More Information


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Technical

How accurate are ph test strips?

  • Our pH test strips resolve acidity or alkalinity in steps of 0.5 or 1.0 pH unit.
  • For strips with step of 1.0 pH , the accuracy is +/- 0.4-0.5 pH unit.
  • For strips with step of 0.5 pH, the accuracy is +/- 0.2-0.25 pH unit.


The method you choose for measuring pH pH measurements depends is largely determined by the accuracy you need. The choices below go from least to most.

  • Litmus test papers give qualitative results; i.e. yes or no, acid or alkaline.
  • pH test strips are semi-quantitative. i.e. they tell you how much but with some uncertainty.
  • A pH meter is quantitative with some error.
  • Titration is quantitative and most accurate but is time consuming & can be expensive if done in a certified lab.