Stablcal Vial for IQ/OQ calibration verification, 10 NTU, for TL23 Series

IQ/OQ requires verification after calibration using a 10 NTU standard. The TL23 turbidimeters are set with the 10 NTU standard as the default for customers who require IQ/OQ. If IQ/OQ is required, the 10 NTU standard must be purchased separately (Hach PN 2659902).