4x20ml, Storage + pH 4 + 7 + 10 Buffer Calibration/Solution/Fluid/Probe/Tester water quality pen Whats Included:

Whats Included:

Optimized formulation: Concentrated potassium chloride solution designed specifically for polarographic DO sensors

ZeroWater's TDS meters are shipped with every 5-stage water filter pitcher so you can test the quality of your water and check the TDS levels in your area

low-maintenance reference system for consistent

1413 µS/cm (included)

4x20ml, Storage + pH 4 + 7 + 10 Buffer Calibration/Solution/Fluid/Probe/Tester water quality pen Whats Included:Design Features Sachet packaging means that you get fresh solution every time Each sachet sealed against light and air Ideal for infrequent or field use Simply open the sachet, insert the tester or electrode and gently stir pH buffers certified to 0. 01 pH accuracy Each sachet contains 20 mL of solution Included 1 x pH 4. 01 calibration buffer solution sachets (20 mL) 1 x pH 7. 01 calibration buffer solution sachets (20 mL) 1 x pH 10. 01 calibration