CPM223PR0110-S410N self cleaning 삽입깊이12.7mm pH측정기 CPM223PR0110-S410N self cleaning 삽입깊이12.7mm pH측정기 CPM223PR0110-S410N self cleaning 삽입깊이12.7mm pH측정기 CPM223PR0110-S410N self cleaning 삽입깊이12.7mm pH측정기 CPM223PR0110-S410N self cleaning 삽입깊이12.7mm pH측정기 CPM223PR0110-S410N self cleaning 삽입깊이12.7mm pH측정기