1 Carton 10 Pk of Phydrion Ph Rolls 93 Full Range Insta Chek Ph- 0-13
- Calibrated to test the concentration of Alkyl dimethylbenzyl ammonium Compounds Roccal II, Hyamine 3500.
- Test solution should be room temperature (ideally 65-75 degree farhenheit).
- Test paper should be held in motionless solution for ten seconds.
- Color chart shows matches at increments of 0-100-200-300-400 ppm.