25 Ammonia Test Strips

SKU: 33817-AMM

$17.95USD or lower Each

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These Indigo® test strips semi-quantitatively measure dissolved ammonia (NH3/NH4+) in the 0-100ppm range; only $17.95 for 25 strips. Similar in design to aquarium strips but intended for much higher concentrations found in bioreactors and some industrial applications. See below for Certificate of Analysis & Stability Statements.

If you are looking to test for leaking ammonia refrigerant gas, click on phenolphthalein ammonia gas indicator test papers. Or, if you need a supersenstive detector for gloveboxes, click on ammonia leak detector cloth. For general information on ammonia, click on: Ammonia-Refrigerant, Leak Detector & Disinfectant.


The strip has two pads. One pad is hydrophilic and alkaline to convert dissolved/absorbed ammonia to a gas. The second is hydrophobic to absorb the gaseous ammonia & indicates the concentration based on pH change.

These test strips can show ammonia removal by oxidation from wastewater in bioreactors or to confirm nitrification of ammonia to nitrite by Nitrosomonas sp. & other bacteria.

  • The number of strips (25) per vial is approximate.
  • Shelf life is a guaranteed minimum 3 years but vial is lined with a desiccant and if properly sealed, strips can last 5 years.

Test Strip Documentation

Stability Statement Certificate of Analysis SDS
Indigo Ammonia Test Strips 0-100ppm Stability Statement Indigo Ammonia Test Strips 0-100ppm Certificate of Analysis Indigo Ammonia Test Strips 0-100ppm SDS
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