This digital pen style pH meter is an ideal instrument for any aquarium, the fishing industry, swimming pools, school laboratories, food & beverage etc. Please be sure to calibrate with buffer solution before use.

Calibration:

-- Immerse the tester up to the maximum immersion level in the PH 4 or 6.86 buffer solution. (Package Includes 1 pack of PH substance which makes 250 ml buffer solutions, PH 4 or PH 6.86).

-- Allow the reading to stablilize and using the small screwdriver adjust the calibration trimmer to reading 6.9

This digital pen style pH meter is an ideal instrument for any aquarium, the fishing industry, swimming pools, school laboratories, food & beverage etc. Please be sure to calibrate with buffer solution before use.

Calibration:

-- Immerse the tester up to the maximum immersion level in the PH 4 or 6.86 buffer solution. (Package Includes 1 pack of PH substance which makes 250 ml buffer solutions, PH 4 or PH 6.86).

-- Allow the reading to stablilize and using the small screwdriver adjust the calibration trimmer to reading 6.9