Feature

●Mark the surface of paper, wood, concrete, etc. with a pencil, and compare the color to the pH measurement
●It is also possible to measure small samples. You can measure the pH by hanging the sample, drawing a line above it with a pencil, or drawing a line with a pencil. Please use on clean and inert surfaces such as glass
●Wet surface with distilled water or non-ionic water and mark with pencil. Wait for 15 seconds and compare the color to measure the pH
●Specifications: pH Measurement Range: pH0-13 Size: 0.4 x 4.5 inches (10 x 115 mm)

Description