| Package Includes | 300 Meter with IP54 Sets, Electrode Clip Wrist Strap and 4 AAA Batteries (Electrode not included)
 | 300 Meter, ST320 3-in-1 Plastic Gel pH Electrode and pH Buffer Powder Sachet
 | ST300-B, ST320 3-in-1 Plastic Gel pH Electrode, pH Buffer Powder Sachet (4.01, 7.00, 10.01), Portable Bag
 | Starter 300C Meter, Conductivity Standards 1413µs/cm and 12.88mS/cm (20 ml bottles), IP54 Sets, Electrode Clip, Wrist Strap, 4 AAA Batteries (Electrode not included) | 300C Meter, with STCON3 4-Pole Conductivity Electrode (70 µs/cm-200 ms/cm, 2 Small Bottles of Standard Conductivity Solution - 1413 µS/cm and 12.88 ms/cm, IP54 Sets, Electrode Clip, Wrist Strap, 4 AAA Batteries | ST300C-B Package, STCON3 4-Pole Conductivity Electrode (70 µs/cm-200 mS/cm), Portable Bag | 300D Meter with IP54 Sets, Electrode Clip, Wrist Strap and 4 AAA Batteries (Electrode not included) | 300D Meter with STDO11 Galvanic DO Electrode, and STTEMP30 Temperature Electrode | ST300D-B Package with STDO11 Galvanic DO Electrode, STTEMP30 Temperature Electrode, Portable Bag |