Compact Handheld Turbidity Meter | Sper Scientific – Sper Scientific Direct
Portable Turbidimeter Turbidity Meter Kit Turbidity Tester with Vials Range 0~1100 NTU/FNU 0~275 EBC 0~9999 ASBC: Amazon.com: Industrial & Scientific
Bante TB100 Portable Turbidity Meter | Turbidimeter Kit | 2 to 5 Points Calibration, Selectable Turbidity Units - NTU/FNU/EBC/ASBC, 100 Sets of Data Storage, USB Interface: Amazon.com: Industrial & Scientific
TN400 Portable Turbidity Meter Digital Portable Turbidity Meter 0 1000 Ntu|Instrument Parts & Accessories| - AliExpress
Oakton OPTM-90 Portable Turbidity Meter, 1000 NTU; 1/Ea from Cole-Parmer