الوصف

This digital pen style pH meter is an ideal instrument for aquarium, fishing industry, swimming pool, school laboratory, food & beverage etc,it is excellent meter, very accurate and durable.This is an economic type ph meter with high precision, digital readout, large LCD display screen, high sensitivity. Very convenient to test ph value for lab and industry and other aspects, because of the small size and light weight.
Pocket-sized PH Meter,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.