Quick view Pyxis Turbidity Calibration Set | 50, 100, & 200 NTU MSRP: $284.00 Description: Pyxis Lab® has developed a wide-range of True Turbidity Calibration Standards recognized as NTU (Nephelometric Turbidity Units). These calibration standards are designed to be utilized for calibration of Pyxis Lab® devices that... MSRP: $284.00 Add to Cart The item has been added Add to Wish list Compare