The HI736 Checker® HC (Handheld Colorimeter) provides a simple, accurate and cost-effective way to measure phosphorus in marine systems including reef tanks.
Phosphorus is an important parameter to measure in aquaculture and aquariums; levels that are too high can lead to extensive algae growth, depleted dissolved oxygen levels, and ultimately can be fatal to many types of fish and aquatic life. Designed as a more accurate alternative to chemical test kits, the HI736 provides quick, accurate results in a few easy steps
Sepcifications:
Range : 0 to 200 ppb 
Resolution : 1 ppb
Accuracy @ 25°C : ±5 ppb ±5% of reading @25°C
Light Source : LED @ 525nm
Light Detector : silicon photocell
Battery Type : (1) 1.5V AAA
Auto-off : after 10 minutes of non-use
Environment : 0 to 50°C ; RH max 95% non-condensingDimensions : 86.0 x 61.0 x 37.5 mm
Weight : 64 g
Calibration Set : HI736-11 NOT INCLUDED
​​​​​​​Warranty : 1 year
What's included :
​​​​​​​1x HI736 Checker®HC
2x sample cuvettes with caps1x
HI736-25 reagent (6 tests)
1x batteries
1x instructions, and quick start guide.