The Hanna Instruments HI774 Checker HC – Marine Phosphate ULR is a handheld colorimeter designed to provide accurate and easy measurement of ultra-low phosphate levels in marine aquariums. Phosphates, while essential for coral growth, can lead to algae blooms and inhibit calcification if present in excess. This checker offers a precise alternative to traditional test kits, delivering digital readings in parts per million (ppm) without the need for conversions.
Measurement Range: 0.00 to 0.90 ppm
Resolution: 0.01 ppm
Accuracy: ±0.02 ppm ±5% of reading
Light Source: LED @ 525 nm
Light Detector: Silicon photocell
Method: Adaptation of the Ascorbic Acid method
Environment: 0 to 50°C (32 to 122°F); RH max 95% non-condensing
Battery: 1.5V AAA (included)
Auto-Off: After 7 minutes of non-use and 2 minutes after reading
Dimensions: 86 x 61 x 37.5 mm (3.4 x 2.4 x 1.5”)
Weight: 64 g (2.25 oz.)