S410-GTk Flat type pH전극 삽입깊이12.7mm, PT1000 온도보상타입 S410-GTk Flat type pH전극 삽입깊이12.7mm, PT1000 온도보상타입 S410-GTk Flat type pH전극 삽입깊이12.7mm, PT1000 온도보상타입 S410-GTk Flat type pH전극 삽입깊이12.7mm, PT1000 온도보상타입 S410-GTk Flat type pH전극 삽입깊이12.7mm, PT1000 온도보상타입