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Hanna Instruments

Hanna HI713 Phosphate Checker

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Hanna Phosphate Checker HI713

The HANNA HI 713 CheckerHC bridges the gap between simple chemical test kits and professional instrumentation. Chemical test kits are not very accurate and only give only a few resolution points while professional instrumentation can cost hundreds of dollars and can be time consuming to calibrate and maintain. The HANNA HI 713 CheckerHC is accurate and affordable.

PDF Hanna Phosphate Checker HI713

  • Easier to use and more accurate than chemical test kits

    Ascorbic acid method
    ±0.04 ppm ±4% of reading accuracy
    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

    Weighing a mere 64 g (2.25 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

  • For marine and freshwater use
  • Ideal for:

    Aquaculture, natural, waste, drinking waters and agriculture


Orthophosphates are found in natural and wastewaters. They are commonly added to drinking water as a corrosion inhibitor. The instantaneous analysis of orthophosphate by colorimetric determination provides rapid results using a standard analysis technique.

The HANNA HI 713 Checker®HC bridges the gap between simple chemical test kits and professional instrumentation. Chemical test kits are not very accurate and only give only a few resolution points while professional instrumentation can cost hundreds of dollars and can be time consuming to calibrate and maintain. The HANNA HI 713 Checker®HC is accurate and affordable.

The HI 713 Checker®HC portable handheld colorimeter features a resolution of 0.01 ppm (250 points) and ±0.04 ppm (mg/L) ±4% of reading accuracy. The HI 713 Checker®HC uses an adaptation of Standard Method 4500-P E, Ascorbic Acid method.

The HI 713 Checker®HC is extremely simple to use. First, zero the instrument with your water sample. Next, add the reagents. Last, place the vial into the Checker®HC, press the button and read the results. It’s that easy.

Product Information:
HI 713 Checker®HC is supplied with sample cuvettes with caps (2), powder reagents for phosphate (6), battery and instructions.

Range   0.00 to 2.50 ppm (mg/L)
Resolution   0.01 ppm (mg/L)
Accuracy @ 25°C   ±0.04 ppm (mg/L) ±4% of reading
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 two minutes of non-use and ten 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, 20th edition, Ascorbic Acid method
Product code: 2495
Item No. TE-HI713

14 Reviews

  • 5
    Wished I’d bought one a long time ago

    Posted by Michael on Mar 21st 2022

    Hi, I’m thoroughly pleased with this product. My first photometer tester . It was amazingly simple and incredibly accurate. Planning on purchasing more. Thank you so much

  • 5
    must have

    Posted by sal on Sep 3rd 2018

    pricey but worth it, accurate and easy to use, love this little tool, have had it for 8 years now, same battery???? yep

  • 5
    Quality product

    Posted by Sergey on Jan 9th 2018

    an excellent product, greatly facilitates the life of the aquarist, you no longer have to try to determine the color visually. But 736 shows three times more accurately.

  • 5
    Loving the ease of use.

    Posted by Russell on Dec 29th 2017

    Just wondering why all testers are not this easy to use.

  • 5
    Quality product

    Posted by David on Dec 28th 2017

    This instrument makes all other household checkers a thing of the past. If you want accuracy at a reasonable price, hanna products are the way to go.

  • 4
    Digital output is good but using the tester is not easy as the steps are confusing and hard to read.

    Posted by Brianalone on Sep 30th 2017

    I like not having to compare colors but I still don't even know if I am performing these Hanna tests correctly. The print was so small I had to download a copy from their website just so I could read it. And to me the steps are confusing, sometimes you hold the button down and sometimes you press it but if you hold it down too long it turns off and you have to start over. I think it would be much better if you just press the button once for each progressive step.

  • 4
    Good product

    Posted by Tom on Dec 13th 2015

    The reagent is a real pain and hopefully Hanna comes with a liquid reagent instead of powder. Overall a good product.

  • 5
    Good product - easy to use

    Posted by Andre on Oct 17th 2015

    I am glad I have this Phosphate checker. It is easy to use and accurate. Takes about 5 minutes and your done. Good investment if you have a reef tank.

  • 5
    Great Product, Easy to Use and Accurate

    Posted by Jeff on Sep 1st 2015

    Love this meter. It is accurate and worth the money, no more guessing color charts. And best of all, it works with both fresh and salt water aquariums! A must have product.

  • 4
    Finally a easy way to read phosphate levels in your reef tank.

    Posted by brad on Mar 25th 2015

    I purchased this unit to help gain control of phosphate levels in my Biocube 29. Until this point I had only used API kits. The Hanna unit was a huge difference by giving you a number instead of a unreadable shade of green. The instructions were clear and easy to understand. My only complaints would be is that it uses powder reagents versus liquid and the unit shuts off after three minutes of inactivity. I can easily overlook a couple shortcomings to gain accuracy of my phosphate levels.

  • 5
    Accurate and best price

    Posted by Tim on Mar 14th 2015

    I am so happy I ordered this checker if for nothing else peace of mind. My phosphate level was in check and I verified it with this test. Only downside is only 6 test provided. But I only plan on testing a couple days after water change.

  • 5
    easy use

    Posted by Jeremy on Feb 28th 2015

    Very nice no color chart to read display is large easy to read

  • 3
    Hanna Phosphate Checker

    Posted by Mark on Jan 24th 2015

    I bought this because I was unsure if the chemical test were right. After the first test my phosphates were much higher than thought. Now I can take action to get my phosphates under control. I would have given this 5 stars but it came with only 6 tests, where other checkers have 25 test that you can do. Why this is only 6?

  • 0
    Good product - very accurate

    Posted by Mitch on Jul 10th 2014

    I have used this Phosphate meter for 2 years. I like it. It gives an accurate reading and is an important tool to have if you have a reef tank. My only suggestion is that Hanna makes the regent a liquid instead of a powder. Not the end of the world but would be an improvement. For less than $50, this is a very good buy.