HQD HQ440D Water Quality Laboratory Biochemical Oxygen Demand (BOD) and pH Meter Package-LBOD101 Sensor and PHC301 ElectrodeMeter package includes HQ440D Laboratory Multi Meter-Universal electrode Stand with electrode holder-PHC301 Standard Refillable pH Electrode with 1 m cable-pH Buffer Kit 4 01/7 00/10 01 (500 mL)-pH electrode storage solution (500 mL)-LBOD101 Luminescent/Optical Dissolved Oxygen (LDO) electrode for BOD Measurement with 1 m cable-Disposable 300 mL BOD Bottle (100 pcs)-BOD Bottle Stoppers (25 pcs)-BOD Bottle cap (6 pcs)-4 Alkaline 1 5V AA batteries-Power Supply Adapter-Power Cord-USB cable for data transfer-and Operating Documentation