Which method is not recommended for measuring sanitizer concentration?

Visual comparison is not recommended for measuring sanitizer concentration because it relies on subjective judgment rather than objective measurements. This method can lead to inconsistencies and inaccuracies, as different individuals may perceive colors differently or may not have the same level of experience. Accurate sanitizer concentration is crucial for ensuring effective disinfection and safety in food handling environments.

In contrast, colorimetric test strips and electronic conductivity meters provide precise and reliable measurements. Colorimetric test strips use chemical reactions that produce a color change based on the concentration of sanitizer, allowing for a more objective assessment. Electronic conductivity meters measure the electrical conductivity of a sanitizer solution, which correlates with its concentration, offering a clear and quantifiable result. Since accuracy is paramount in food safety practices, relying on visual comparison can jeopardize health standards.