“ph Controller”=1 ph probe （5m and plastic）+ 1 controller
orp Controller=1 orp probe （5m and plastic）+ 1 controller
4 fluorine electrode=1 ph probe（5m and 4 fluorine）+1 controller
Glass electrode=1 ph probe（5m and 4 glass）+1 controller
ph probe=1 ph probe with 5m plastic
orp probe=1 orp probe with 5m plastic
only Controller=1 controller