PH test pen,PH test pen (professional temperature-replenishing design)  PH value has absolute effect on aquarium ecology. In normal water, there is appropriate oxygen and carbon dioxide. When the free carbon dioxide content in the water is reduced, the aquatic plants, in order to make up for the demand, will promote a kind of biological decalcification in the water. Through this process, the aquatic plants supplement the required carbon dioxide from the carbon of bicarbonate. Under such an abnormal change, the PH value may rise to between 9 and 10, causing serious adverse effects in the aquarium. Therefore, it is necessary to control the PH value in the water to reach a stable carbonate hardness and the optimal effective capacity of CO2, and maintain a certain PH value in the aquarium.

Detailed description:

Model PH - 2011
Measuring range 0.00-14.0PH
Resolution 0.01 pH
fine Plus or minus 0.01 pH
Automatic temperature compensation 0℃-55℃
electricity Source 3×1.5v(ag-13 button battery)
Operating environment 0 ~ 50℃ RH < 95%
The body of the Product 152 x 29 x 15 mm
heavy The amount of 50 g

Suitable for fresh and sea water

PH meter calibration:

1, a pack of 6.86 calibration powder to 250ML of water (distilled water/pure water/ph neutral water is ok, normal temperature), and gently shake. Put the pen down to test the PH value of the solution. If it shows 6.8, the pen is correct.
2. If the display deviates from 6.8, adjust the calibrating potentiometer (the hole on the back) with a small screwdriver until the display value matches the ph value of the standard buffer solution at the ambient temperature. When correcting 4.0, correct the pen to 4.0. Don't leave the pen out of the water while you correct it
Notes:
The pH meter must be recalibrated when:
Having been used (or placed) for a long time after calibration;
Frequent use of electrodes;
The measurement accuracy is high.