For control of the turbidimeter calibration stability.
Gelex Secondary Turbidity Standard Set is required to check turbidimeter calibration stability. The standard cannot be used to calibrate a turbidimeter. Five sealed vials are included in the set. NTU concentration of each vial is in the range of 0-2 NTU, 0-20 NTU, 0-200 NTU, 200-4000 NTU and 4000-10000 NTU. Gelex Secondary Turbidity Standard Kit is compatible with 2100N, 2100N IS, 2100AN and 2100AN IS turbidimeters.
| Brand | Hach |
| Parameter | Turbidity |
| Concentration | 0-2 NTU, 0-20 NTU, 0-200 NTU, 200-4000 NTU, 4000-10000 NTU |
| Instrument | 2100N, 2100N IS, 2100AN, 2100AN IS |
| Quantity | Set of 6/pk |
