Mudder 0.01 high PH type pen Pocket Digital Readout Meter Accuracy With ATC, Large backlit LCD Size, 0.00-14.00 PH measurement range, measurement Potable water, water Aquarium Pool ( Yellow) (Tools & Accessories)
It gives an accurate messure the acidity of the tap controlling meter with paper, this is handy for quickly controlling water if have any doubt about the IDF in qualitée