Phosphate High Range Colorimeter HI717 Hanna Checker - Fresh & Marine Water

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Phosphate High Range Colorimeter HI717 Hanna Checker - Fresh & Marine Water

67% Recommend this to a friend (2 of 3)

SKU: 208617
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Quick Overview

Check for high ranges of Phosphates (orthophosphates) in your fresh and marine water. The Hanna HI717 Checker HC Handheld Colorimeter for Phosphates HR 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 reagents to the sample. Last, place the vial into the Hanna Phosphate High Range Checker, press the button and read the results. Done.

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Product Questions

How do I know which phosphate checker I need low or high range? I have a 125 reef tank

Thank you

Question by: Todd on Aug 12, 2014 4:17:00 PM
Hi Todd,

The low range Hanna Checker has a maximum of 2.50 ppm Phosphate reading which is more than enough for a reef tank. I would only recommend the High range Checker for fish only systems where maintaining very low Phosphate levels is not as big of a concern.

I hope this helps!
Have a great day :)
Answer by: Bulk Reef Supply on Aug 12, 2014 4:17:00 PM

Full Details

HI717 Phosphate HR Colorimeter Manufacturer's Manual

HI717 Phosphate HR Colorimeter LIterature


  • Easier to use and more accurate than chemical test kits
  • Large, easy to read digits
  • Auto shut-off
  • Dedicated to a single parameter
  • Designed to work with HANNA's reagents
  • Uses 10 mL glass cuvettes
  • Small Size, Big Convenience
  • Fits in the palm of your hand


  • Range: 0.0 to 30.0 ppm (mg/L)
  • Resolution:.01 ppm (mg/L)
  • Accuracy: ±1 ppm (mg/L) ±5% of reading at 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 10 seconds after reading
  • 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 the Standard Methods for the Examination of Water and Wastewater, 18th edition, Amino Acid method



3 Items

  • Used about a year now By Aja on 2/27/2016

    Easy to use, cut 2 sides of packet and make a fold to accurately pour contents. Takes a little longer to dissolve. Keep button pressed to initiate 3 minute countdown. Gives you time to do the alkalinity!
  • Great product, little tricky system, but quick once perfected. By Alex on 1/25/2015

    Ok, so hear me out..... This is one of the best saltwater products I've purchased.
    The reason why most DO NOT like it is its packaged powder for changing the color of the sample for testing. The system automatically shut off after 2-3 minutes, so to do it right, you must shake the package and cut open two of the four sides and open it..... So when the solution is ready, you just pour in and shake..... That's it!!!
  • Didn't work when received By JOhn on 12/13/2014

    the test did not work as the instructions said. In fact it was hard to even get the tester to turn on. I have returned the malfunctioning tester. I am waiting for a replacement.