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Test Strips

Chlorine Strips: 0 - 300 PPM.

Test Strips - Chlorine Strips: 0 - 300 PPM. 


Chlorine test strips by Serim are Mid Range Chlorine Test Strips, measuring free chlorine concentrations of 0 - 300 ppm with color block increments at 0, 25, 50, 100, 200, and >300 ppm.  Use Chlorine Test Strips to test a wide variety of solutions containing chlorine.

Chlorine test strips give a semi-quantitative indication that chlorine-based sanitizers have the appropriate concentration of free chlorine required for sanitizing food and food processing equipment.

These test strips are designed to be ready-to-use with easy-to-interpret boxes directly on the chlorine test strip. For more information on chlorine test strips, see the PDF below.

Each bottle contains 100 Chlorine Test Strips.

WHAT does this product do?
Serim® Monitor™ for Chlorine Potency strips measure free chlorine.  The test gives a semi-quantitative indication that chlorine-based sanitizers have the appropriate concentration of free chlorine required for use in sanitizing food and food processing equipment.

 WHY should I use this product?

In food processing, the concentration of chlorine can range from 10-ppm to 5000-ppm depending on the type of food being processed (meat, poultry, seafood, dairy, fruits, vegetables, eggs, etc…), the processing stage and federal (USDA, EPA, FDA) or state regulations.

Using a free chlorine concentration that is too low may not thoroughly disinfect equipment. However, using an unnecessarily high concentration of chlorine may apply unnecessary, undesirable, potentially unhealthy, or unlawful levels of disinfectant to water systems. In addition, the free chlorine concentration in soaking tanks and foot baths is depleted by organic matter during use and needs to be monitored continually. “The goal is to develop cleaning/sanitizing methods that effectively rid the product, plant, and equipment of soil and microorganisms for the least expenditure and effort” without overusing chlorine.

Serim Monitor strips allow testing at various points-of-use in the food manufacturing industry and yield quick answers as to whether the free chlorine concentration at a particular processing stage is present at an adequate concentration.

 WHERE do I use this product?

Review the applicable regulations or manufacturer’s equipment instructions to determine the appropriate sampling point.  Periodic samples may be required to determine that the chlorine potency remains at the desired level.

 HOW to 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 free chlorine.  The strips yield a semi-quantitative method estimation of the free chlorine concentration with color block increments at 0, 25, 50, 100, 200, and ≥300-ppm.

 Ordering Information

Serim Monitor™ for Chlorine Potency Stips

·         Product Code 5148 – 1 bottle of 100 strips

Test Method


Test Strip Technique

Immerse the indicator pad into the sample. Remove immediately & firmly shake to remove excess sample.


Between 15 and 30 seconds after removing strip from sample, compare the color of the indicator pad to the color blocks on the bottle label. Match color at center of pad to the color block. Disregard color around outer edge of indicator pad.

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, unlike generic chlorine tests; i.e., swimming pool tests

Ready-to-use strips, simple procedure

·         No preparation or mixing of reagents

·         No calculations or “drop counting” needed

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

Color of indicator pad is stable at high chlorine concentrations

·         Indicator pad does not bleach out if free chlorine is >300-ppm

Strip results not affected by common water constituents

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

Consistent color reactions

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

Each bottle clearly labeled with:

·         Lot number

·         Unopened expiration date

·         Opened bottle use-life

·         Traceability of product from manufacturing to final user

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

Download Mid Range Chlorine Strips Product Profile


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