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Phosphorus ultra low range Checker HC® colorimeter: Range 0 to 200 ppb

60.50  + PVM

The HI736 Checker® HC (to measure phosphorus in marine systems including reef tanks. Range 0 -200 ppb.

SKU: HI736 Category: Tag:

Available on backorder - This item may take 2-3 weeks to deliver.

The Hanna Phosphorus Ultra Low Range (0 to 200 ppb) Checker® bridges the gap between simple chemical test kits and professional instrumentation. Chemical test kits have limited accuracy and resolution since they rely upon the human eye to discern differences in color. Professional instrumentation incorporates a light source such as an LED or tungsten lamp with a filter and a light sensing detector to precisely determine ion concentration. Professional instrumentation offers greater resolution and accuracy but can cost hundreds of dollars. The Hanna Phosphorus Ultra Low Range Checker® uses a fixed wavelength LED and silicon photo detector to provide the accuracy of professional instrumentation at the affordable price of a chemical test kit.

checker compact and portable meter

Compact, Portable Design

checker built-in timer

Built-in Timer

checker one-button operation

One-Button Operation



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 four easy steps:

How to use Hanna Checker Handheld Colorimeter

Features at-a-glance:

  • Easier to use and more accurate than chemical test kits
  • Dedicated to a single parameter
  • Small size, big convenience
  • Ideal for: Aquariums, Environmental, Aquaculture, Water Quality



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Phosphorous Range 0 to 200 ppb (ug/ml)
Phosphorous Resolution 1 ppb (ug/ml)
Phosphorous Accuracy ±5 ppb ±5% of reading
Phosphorous Method adaptation of the Standard Methods for the Examination of Water and Wastewater, 20th edition, Ascorbic-Acid method.
Photometer/Colorimeter Light Source LED @ 525 nm
Photometer/Colorimeter Light Detector silicon photocell
Battery Type/Life (1) 1.5V AAA
Automatic Shut-Off after three minutes of non-use and two minutes after reading
Environment 0 to 50°C (32 to 122°F); RH max 95% non-condensing
Weight 64 g (2.25 oz.)
Dimensions 86.0mm x 61mm x 37.5mm (3.4″ x 2.4″ x 1.5”)
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.

Additional information

Weight 0.34 kg

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