Reverse Osmosis Parts Portable PH Test Pen With Printed Plastic Housing

Attention :

The instrument need recalibrate in the following condition .

1 . Long time no use or use very long time after calibration .

2 . The electrode is used Very frequently .

3 . The testing accuracy requirement is very high .

4 . Press the "CAL" button long time in the air carelessly .

PH electrode maintenance :

If the electrode placed long time , and electrode exposed to air ,

then showing values is slow and not stable, because of electrode dry .

You should immerse the electrode into water for few hours .

PH meter works :

PH meter is a potential measurement method to measure the PH value of the solution , so PH meter work , in addition to measuring the PH value of the solution , it can also measure the battery's EMF . PH in Latin , is the abbreviation of Pondus hydrogenii , is the activity of hydrogen ions in the material , PH value is the hydrogen ion concentration logarithmic negative .
PH meter's main measurement component glass electrode and reference electrode , glass electrode is sensitive to PH , while the reference electrode potential is stable . The PH meter of these two electrodes together into the same solution , to form a galvanic cell , and the potential of the original battery , is the glass electrode and reference electrode potential algebra .

PH potential of the reference electrode is stable , then the temperature remains stable , the solution and the electrode composed of the original battery potential changes only with the glass electrode potential , and the glass electrode potential depends on the measured solution PH Value , so by measuring the potential changes , we can get PH PH value of the solution .

PH meter structure :

PH meter structure , including composite electrode and galvanometer , composite electrode is what we call the reference electrode and reference electrode , in general , PH indicator electrode are glass electrodes . The function of the glass electrode is sensitive to hydrogen ions in the solution , and the potential difference is reflected by the change of the hydrogen ion . The role of the reference electrode is to provide a constant potential as a deviation from the reference potential .

PH meter components , the galvanometer is used to measure the overall potential , it can be great resistance in the circuit to capture a small potential changes , and the changes shown by the meter out . In order to facilitate reading , PH meter has a display function , that is , the output current meter into PH readings .