Quat Sanitizer Test Strips

100, 400, 1500, 10000ppm: organic farms, restaurants, foot baths. Get accurate results in <10 seconds; why wait a minute?

Quaternary Ammonium Compounds (Quats or QACs )

Quaternary ammonium compounds are the most chemically complex sanitizers. Their name derives from the central nitrogen that is bound to four organic groups. Quats bind with microbial cell walls and interfere with their metabolism. They are also shown to be effective against lice eggs and other invertebrates when used in higher concentrations.

Whatever your quaternary ammonium sanitizer concentration needs are, Indigo quat test strips have the range you need.

  • 10 to 100ppm for residual testing-organic food certificaiton
  • 0 to 400ppm general use in restaurants
  • 0-1500ppm high level disinfection in health facilitiies
  • 0-10000ppm very high level disinfection-foot baths 
  • easy to read color chart
  • strips have white backing for good contrast comparison
  • strips are stiff plastic; good for dipping into tubes
  • Measures accurately from 5-45C (50-110F).

Note: All test strips Made in USA & are Q/A'd against NIST standards.

Displaying 1 to 4 (of 4 products)
Restaurant Quat 400 ppm

Restaurant Quat 400 ppm

SKU: 33819-400
$7.95USD or lower Each
High Level Quat 1500 ppm

High Level Quat 1500 ppm

SKU: 33819-1500
$11.95USD or lower Each
Very High Level Quat 10K ppm

Very High Level Quat 10K ppm

SKU: 33819-10K
$15.95USD or lower Each
Residual Quat 10-100 ppm

Residual Quat 10-100 ppm

SKU: 33819-100
$11.95USD or lower Each
More Information

Quaternary ammonium chloride solutions come in many varieties. Ours are calibrated for Oasis 146 but can be considered multi quat sanitizer test strips since results for other formulations such as the ones below will still be accurate.

Quaternary Ammonium Compounds List

benzalkonium chloride
benzethonium chloride
methylbenzethonium chloride
cetalkonium chloride
cetylpyridinium chloride
dofanium chloride
tetraethylammonium bromide
didecyldimethylammonium chloride

Quats they have their advantages & disadvantages:

  1. Work best in the pH range of 8-11
  2. Loses potency in hard water (see hard water test strips)
  3. Color charts start to deviate at 45C (110F) & above.


See Technical Tab for correct interpretations.

If you have an interest in chemistry, try our 3D Molecular Model Builder. It should be able to render all the above compounds. Note though the chlorides will appear dissociated from the main structure.


Temperature and QAC strips reading relationship

Temperature vs ppm results for Hyamine 1622 (Fluka) warmed up from 35 to 60oC (95-140F).

T (oC) QAC strips readings at: 0; 50; 100; 200; 400 ppm
35     Readings ok for 0-400ppm
40     Readings ok for 0-400ppm
45     0, 50, 100 ppm readings ok; 200 & 400 ppm read~ 1/2 color square higher
50     50, 100 ppm read~ 1/2 color square higher; 200, 400 ppm read 1 color square higher
55     Readings 1 color square higher across whole range
60     Readings 1 color square higher across whole range

Follow the directions on the label. All our quat strips are "quick response". In other words, dip the strip & compare to the color chart immediately. If you wait, the color will develop further & give a false high reading.