Reddit reviews Industrial Test Systems WaterWorks 480023 Free Chlorine Test Strip, 5 Second Test Time, 0-25ppm Range (Pack of 50)

✔DETECTION LEVELS: Free Chlorine 0, 0. 25, 0. 5, 1. 0, 2. 0, 3. 0, 4. 0, 5. 0, 6. 0, 7. 0, 8. 0, 9. 0, 11, 15, 20, 25 ppm✔EASY TO USE: Single dip and read test strip procedure and optimized color chart make the product ideal for technical and non technical users alike for detection of Free Chlorine in water✔COMPLETE KIT: Bottle of 50 test strips with verified color chart bottle label for easy color matching✔ACCURATE AND RELIABLE: Components are tested by Quality Control personnel at each step and are rejected if they are outside of specifications. Standards are prepared using calibrated equipment, and concentrations are confirmed by recognized reference methods✔HIGHEST QUALITY: ITS, manufactures test strip products in their USA facility in an environment that allows for reproducibility, accuracy, and traceability based on Good Manufacturing Practices