50′ pH Roll – Roll, 0 – 13, 0.5″

Description

• This pH roll accurately measures weakly buffered or dark, turbid solutions
• To start using this roll, simply tear off a small strip of pH paper, dip it into the test solution, then compare the resulting color instantly with the included pH colour chart
• Dispenses like tape
• Reusable hard plastic case
• Ideal for field use