2660149 Stablcal Stabilised Formazine Turbidity Standard 20 NTU, 500 mL

Stablcal Turbidity Standard (p/n 2659749) is required for fast and error-free turbidimeter calibration. The solution has the volume of 500 mL with NTU concentration of 20 NTU. Stablcal Stabilised Formazine Turbidity Standard is manufactured to be used with TL23, TU52, 2100Q, 2100N and 2100AN series turbidity meter.

Procedure for infrequently used StablCal Turbidity Standards

This process is applicable to standards that have been in use for more than a week or to recently received standards.

For bulk solution standards: Invert the standard repeatedly for 2-3 minutes breaking up the condensed suspension into the original particle size. After 5 minutes, invert 2-3 times before adding the standard into the clean sample cell. Rinse the sample cell with the bulk standard. Then clear the sample cell of any optical deviations. Add the standard to the sample cell, close the sample cell and the bulk solution.

For bulk solution and sample cell standards: In addition to the aforementioned procedure, invert the sample cell 2-3 times and let the sample settle down for 2-3 minutes. The sample cell is now prepaired for the measurement.

Storage conditions

It is required to store the standard between 5 °C and 25 °C. It is important to protect the solution from light rays. It is not recommended to transfer the standard to another container for storage.