HF Scientific MicroTPW [20000] Field Portable Turbidimeter (White Light),  0 - 1100 NTU. Designed to provide the ease of portability needed in the field with rugged durability, the MicroTPW is a necessity for anyone monitoring turbidity on the go. The shock-resistant carrying case holds everything necessary for field operation while the instrument itself removes easily to go wherever it is needed. With resolution of 0.01 NTU and an extended range to 1,100 NTU, the EPA Accepted White Light MicroTPW is a perfect partner for field use.