Ph meter

Ph meter are store in fresh KCl 3M. Have to be dip in water for about 2 Hours before use

Change KCl and clean every 3 month ;

June -September

Sept- December

Jan - April (Easter)

Easter - June

Update : addd 4.0 buffer make KCl last longer (about 5 month) 

• Make 300ml of 4.0 M KCl (59.46g to 300ml of Distilled water)

• Make 300ml 4.0 Ph Buffer (3 X  4.0 buffer Tab for 300ml Distilled water)

• mix up solution and use for Ph meter storage solution