pH-Fix 2.0-9.0 Indicator Sticks 6x85mm (100 pcs)

These pH indicator sticks are ideal for determining pH in the range of pH 2 to pH 9. The rigid plastic sticks measure 85 mm (length) x 6 mm (width) and feature four separate pH test zones to cover the intended pH range. Each test zone has been infused with a non-bleeding pH indicator compound that has been optimized to prevent contamination of the solution and to allow measurement of highly alkaline or weak buffer solutions. When testing pH, the strips cause a permanent color change, even if left in place, e.g., when testing low ionic strength solutions. An immediate result is obtained by comparing the color of the four test zones with the included pH color chart. The pH color chart exactly matches both the color and the position of the pads on the strips. The results are easy to interpret and can be reliably determined, as the pH gradations are in 0.5 increments. The pH indicator sticks are suitable for many applications, both in the laboratory and in the field. They have an advantage over other pH measurement methods in that they do not require additional equipment compared to liquid test kits and digital meters. This makes them more portable, durable, and easily replaceable. The pH indicator sticks are supplied in packs of 100 disposable sticks. They can be stored unopened for 2 years without sunlight.