Hydrion Single Roll QC-1001 Quat Check Test Paper w/ Dispenser/ColorChart Range 0-1000ppm

This is the only item we can find that meets our needs. Does the job, so we'll continue to purchase as required.

Great product!

We use these test strips to test the efficacy of disinfectant cleaning products we use for medical accounts. They do what they are intened to do--test!

I have 3 bottles of strips of a different brand and they worked fine.I tried them side by side with this one and these didn't register at all.I double, triple checked that we were using the compatible chemicals and were within the range this is capable of detecting.The expiration was not for some time.Not sure why they didn't work.Was able to return for a refund.