Since the existing cage was also of the same type, it operates normally after replacement.
As we are using it for hot spring pumping tanks outdoors, screws and washers of the connecting terminal of the existing cage were rusted causing malfunction. After exchanging, I tried painting caulking agent carefully, so I will see a state. I wish I had become waterproof type.
Omron made 4P for inventory but because the existing electrode holder was made by Panasonic, I purchased it considering the case where the lower threaded part can not be removed. Although the screw part was removable this time, it also damaged the part where the pylen was burned in the hexagonal part of the old article as well. I changed it to Omron made for the future.