Sertun Sanitizer Indicator Towel features patent-pending Color Check Technology that verifies proper quaternary ammonia (Quat) sanitizer levels on hard surfaces. The disposable towel measures 13.5 by 18 inches and changes color from yellow to blue when sufficient Quat is present in the sanitizer bucket and the towel. As Quat is deployed, the towel color shifts from blue back to yellow, indicating low sanitizer levels. Recharging the towel in the sanitizer restores the blue color. This yellow and white checker towel provides a visual indicator to ensure effective sanitizing in foodservice environments, available in a case of 150.