Hanna HI774 Marine Phosphate Ultra Low Range Checker® HC – 0.90 ppmThe Hanna HI774 Checker HC is an elite, pocket sized digital colorimeter designed exclusively for measuring Ultra Low Range (ULR) Phosphate in saltwater environments. Utilizing the Ascorbic Acid method, it delivers microscopic precision from 0. 00 to 0. 90 ppm (mg L) with a 0. 01 ppm resolution. It completely replaces subjective chemical drop kits, acting as the absolute standard diagnostic tool for high end marine reef aquarists maintaining Ultra Low

Because it is purely pneumatic (driven exclusively by compressed air)

050W of input power for high-speed

Fitting and installation

Deep electrical wall channels

the HI83300 features a dedicated Digital pH Electrode Input

6mm (18TPI) blade

Engineered for durability and serviceability

Housed in an IP67 waterproof casing and utilizing a polarographic DO probe

Compact & Rugged: Designed to be carried in a pocket directly to the aquarium sump or industrial pump room

TDS Calibration: Automatic

ranging from 100 ppm up to 100%

1 FTU (Formazin Turbidity Unit) is equivalent to 1 NTU (Nephelometric Turbidity Unit)