NEW! Now our Chlorine Dioxide check is also available in High Range. Check your Chlorine Dioxide levels with Confidence using our WaterWorks™ Chlorine Dioxide Check High Range. Make sure your Chlorine Dioxide levels are where you want them to be. Contains 50 tests.

With our patented indicator there will be no bleach out of colour even at high concentrations.

- Simple method and no dilution necessary
- Get results in 32 seconds
- No instrument required
- Safe and non-hazardous

Range 0, 10, 25, 50, 100, 250, 500, 750, 1000, 2500 ppm (mg/L)

Made in USA

Ideal for checking your sanitizer level!