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Test Strips

QAC - Quat Strips: 50 - 1000 PPM.

Test Strips - QAC - Quat Strips: 50 - 1000 PPM. 


Serim QAC-Quat Test Strips estimate QAC (quaternary ammonium compound) concentrations from 50 - 1,000 ppm with coded color blocks at 50, 100, 200, 400 and 1000 ppm. 

WHAT does this product do?

Serim® Monitor™ for QAC test strips give a semi-quantitative indication that QAC (quaternary ammonium compound) sanitizers are at the appropriate concentration for use in sanitizing food processing equipment and facilities.

WHY should I use this product?

In food processing, the concentration of quaternary ammonium compounds can range from <200-ppm to 5,000-ppm. Recommended concentrations vary depending on the needs, equipment, plant design, and federal (FDA) or state regulations.

Using a QAC concentration that is too low may not thoroughly sanitize surfaces or equipment. Using a concentration that is higher that recommended (<200-ppm) for food contact items without a peruse rinse may leave a toxic residue on these surfaces.

Serim Monitor strips are used to indicate whether the concentration of a solution is adequate for the surface being sanitized.

WHERE do I use this product?

Follow the manufacturer’s directions for dilution of the QAC concentrate for the specific surface being sanitized. Use the Monitor QAC strip to determine if the concentration is at the recommended level.

HOW do I use this product?

Serim Monitor strips are supplied in ready-to-use form. When placed in contact with the sample according to the directions for use (see below), the indicator pad changes color relative to the concentration of the QAC solution. The strips can be used to estimate QAC concentrations from 50-1,000 ppm, with coded color blocks at 50, 100, 200, 400, and 1000-ppm.

Ordering Information

Serim Monitor™ for QAC Strips

·         Product Code 5152 – 1 bottle of 100 strips

Six factors that affect how a sanitizer performs:

·         Concentration – Proper dilution is very important. Read label for complete dilution directions.

·         Contact Time – QAC-based sanitizers carry a positive charge. Bacteria, viruses, and fungi carry a negative charge. When a QAC-based sanitizer is applied to a bacteria-laden surface, the charge distribution of the bacteria cell changes. This results in the disruption of the bacteria cell wall and eventual death of the microbe. The cell walls do not break down immediately – thus necessitating the 10-minute contact time.

·         pH – Most QAC sanitizers work best under alkaline conditions.

·         Temperature – Certain sanitizers work best in cold water (bleach). Most, like QACs, work best in warm water.

·         Soil Load – Heavy soil should be removed before disinfecting.

·         Organism Type – Not all sanitizers work on all types of organisms. Read the product label for a complete list.

Test Method


Test Strip Technique

Immerse the indicator pad into the sample. Remove immediately.


Within 15 seconds, compare the color of the indicator pad to the concentration coded color blocks on the bottle label.

Store bottles of Serim Monitor strips at temperatures between 15°-30° C (59°-86° F).

The expiration date is printed on each bottle.




Designed specifically for the food processing industry

·         Color blocks at levels of importance to the food processing industry

May be used with Acid QAC solutions

·         Reliable results with Acid QAC solutions

Strip results not affected by different formulations of various commercial brand QAC solutions

·         Test strips can be used to estimate QAC concentration on first to fourth generation commercial brand QAC solutions with the exception of Hyamine 1622

Ready-to-use strips, simple procedure

·         No preparation or mixing of reagents

·         No calculation needed

Strip results not affected by common water constituents

·         Confidence that any positive result is due to free chlorine or other oxidants

Quick, semi-quantitative results in 15 seconds

·         Simple, quick, and reliable method

Simple to interpret color blocks

·         Accurate and consistent results minimize variation between readers

·         Color of indicator pad is directly compared to color blocks on bottle label

Consistent color reactions

·         Results not affected by aging during the shelf life of the product

Each bottle clearly labeled with:

·         Lot number

·         Expiration date

·         Traceability of product from manufacturing to final user

·         Leaves no doubt as to the age or integrity of the product

Each bottle contains 100 Quat Test Strips.

Download QAC - Quat Test Strips Product Profile


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