Hanna Instruments

Phosphate Low Range Colorimeter HI713 Hanna Checker - Fresh & Marine Water

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Why does BRS recommend this?

The Hanna Phosphate Checker is an awesome little tool that will give you accurate easy to read results.  If you have bad eyes or have a hard time with color change test kits, the digital readout on the Hanna checkers is super easy to read.  The biggest key with Hanna checkers is keeping the vials nice and clean for consistent results.

Three simple steps to results. The Hanna Phosphate Checker bridges the gap between simple chemical test kits and professional instrumentation. Accurate, affordable and easy to use. First, zero the instrument with your water sample. Next, add the reagent. Last, place the vial into the Hanna Phosphate Checker, press the button and read the results. Done.

Adaptation of Standard Method 4500-P E Accuracy 4% ±0.04 ppm (mg/L) of reading 0.04 ppm (mg/L) resolution (250 points) Large, easy to read digits Auto shut-off.


Dedicated to a single parameter

Designed to work with HANNA's powder reagents Uses 10 mL glass cuvettes. 


Small Size, Big Convenience

Weighing a mere 65 g (2.3 oz.), the Checker®HC easily fits into the palm of your hand or pocket.Use for quick and accurate on the spot analysis. Single button operation: Zero and Measure Operated by a single AAA battery. 

  • Range: 0.00 to 2.50 ppm (mg/L)
  • Resolution: 0.01 ppm (mg/L)
  • Precision: ±0.04 ppm (mg/L) ±4% of reading @ 25°C
  • Light Source: LED @ 525 nm
  • Light Detector: Silicon photocell
  • Environment: 0 to 50°C (32 to 122°F); RH max 95% non-condensing
  • Battery Type: (1) 1.5V AAA
  • Auto-off: After 2 minutes of non-use and after read
  • Dimensions: 81.5 x 61 x 37.5 mm (3.2 x 2.4 x 1.5")
  • Weight: 64 g (2.25 oz.)
  • Method: Adaptation of Standard Method 4500-P E.


What's Included

1x HI713 Low Range Phosphate Checker

6x HI713 Reagent Packets


Replacement Reagents - HI713-25 Phosphate Checker Reagent Refill


Which is better to test for, Phosphate or Phosphorus? Want to find out - Click Here

More Information
UPC 5035318001444
Manuals Operating Instructions
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Product Questions

I see on here that some users suggest buying the hi736 instead. Which one will work best to determine your overall PO4?
Question by: Justin on Jun 3, 2016, 9:26 AM
Great question!
We personally use the Phosphate low range in house as it is accurate enough and we do not need to convert the reading from Phosphorous to Phosphate. While the Ultra Low range will give extra decimal placed to your answer We find this is not the most important. Feel free to let us know if you have any further questions!
Answer by: Connor on Jun 8, 2016, 3:01 PM
Since the Hi713 and reagents are the same for both fresh water and marine, is it safe to assume variations of salinity will have no bearing on the results?
Question by: William Neiman on May 2, 2016, 2:01 AM
Great question! That is a safe assumption to make, salinity should not effect the reading with this checker.
Answer by: Carter on May 4, 2016, 1:57 PM
Does this meter require periodic calibration with some kind of calibration solution?
Question by: Eric on Jun 19, 2014, 8:50 PM
Hi Eric,
One of the first steps every time you test is to zero out the meter, then you add reagent and test the actual sample. This is done every test but It does not require any sort of extra calibration procedure on top of that.
Answer by: Bulk Reef Supply on Jun 19, 2014, 8:50 PM
how many test does this kit provide. Thanks.
Question by: Mark on Nov 30, 2013, 6:00 AM
Hey Mark,
The phosphate checker itself comes with enough reagent for 5 tests. Reagent refills are sold in packs of 25 and can be found right here:
Answer by: Bulk Reef Supply on Nov 30, 2013, 6:00 AM