ハンナ HANNA Kタイプ 温度センサー HI 766HDが別途必要 ( HI 766PD ) ハンナ HANNA
Platinum Ring In-Line Sensor | HI7638,In-line Conductivity Probe - HI7639,Four-ring EC/TDS Probe with Internal Temperature Sensor,Dissolved Oxygen Controller with Extended Range and Analog,Advanced Dissolved Oxygen Benchtop Meter - HI6421