The Hydrion Insta-Chek Mechanical pH Pencil measures the pH of any surface to the nearest full pH value. The Hydrion pH pencil can be used to test irregular or uneven surfaces and is also effective on porous material an impervious solids. It offers clear bright single colour matches at every 1.0 interval from pH 0.0 to 13.0.
The pH pencil comes with its own colour pH matching chart.
The pH Pencil is use to detect acid or alkali residues and may be used to measure the pH of any of the following, paper, timber, concrete, cement, plasterboard, pre-painted surfaces, painted surfaces, textiles, skins and ceramics.
To measure the surface pH, just wet the surface with distilled water. Stroke the surface with the pencil. Wait approxiamtely 30 seconds and compare the resulting colour change with the colour chart.
No printing option include.