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Hanna HI736 Marine Ultra Low Range Phosphorus Checker HC

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Your Price: $59.99
Part Number: HI736
Our ultra-low range phosphorus colorimeter brings you more precise technology from your typical chemical test kit.

Remove the human error from your testing
No need to count drop or titrate your sample
Detects color changes your eye cannot
No calibration required
Get east, quick and consistent results
Accurate and affordable
Cost efficient: Once you purchase the Checker, reagents are sold separately saving money long term


The HI736 Checker® HC (Handheld Colorimeter) is a cost-effective way to measure phosphorus (orthophosphate as phosphorus) in marine systems, including reef tanks. Testing for orthophosphates is standard practice for saltwater aquariums and provides valuable insight into your reef tank’s water chemistry to help ensure long-term coral health. Phosphorus is an important parameter to measure in aquaculture and aquariums; levels that are too high can lead to extensive algae growth and prevent coral calcification and growth. 


Features at-a-glance:

Most popular phosphate meter for reef aquariums.
To convert phosphorus ppb to phosphate ppm multiply the reading by 3.066 then divide by 1,000
Saltwater only, best for SPS dominant aquariums and low nutrient systems
Reads as low as 1ppb phosphorus or 0.003 ppm phosphate (reads in parts per billion phosphorus)
Reads as high as 200ppb phosphorus or 0.613ppm phosphate
Comes with 6 tests, reagent refill for 25 tests: HI736-25 


Range: 0 to 200 ppb
Resolution: 1 ppb
Accuracy @ 25°C/77°F: ±5 ppb ±5% of reading
Light Source: LED @ 525 nm
Light Detector: silicon photocell
Method: adaptation of the Standard Methods for the Examination of Water and Wastewater, 20th edition, Ascorbic-Acid method
Environment: 0 to 50°C (32 to 122°F); RH max 95% non-condensing
Battery Type: (1) 1.5V AAA
Auto-off: after three minutes of non-use and two minutes after reading

Dimensions:81.5mm x 61mm x 37.5mm (3.2" x 2.4" x 1.5”)
Weight: 64 g (2.25 oz.)

Ordering Information
HI736 Checker® is supplied with (2) sample cuvettes with caps, phosphorus ULR reagent starter kit for 6 tests (6 powder reagent packets), battery, instructions and quick start guide.

1 year limited warranty

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