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The HI 713 Checker HC Handheld Photometer for Phosphate is a portable tester for measuring orthophosphates in natural, waste, and drinking waters.
The HI 713 bridges the gap between less accurate chemical test kits, and expensive professional test instrumentation. The HI 713 features a resolution of 0.01 ppm (250 points) and 4% + or - 0.04 accuracy of reading. To use, zero the instrument with your water sample, then add the reagent. Place the vial into the checker, press the button and read the results within seconds.
The HI 713 operates in temperatures from 0 to 50 degrees C (32 to 122 degrees F)/RH max 95% with a range of 0.00 to 2.50 ppm (mg/L) with precision + or - 0.04 ppm (mg/L) + or - 4% of reading at 25 degrees C. The device operates on one 1.5V AAA battery, with an auto-off function that shuts off the device after two minutes of non-use. Dimensions are 81.5 x 61 x 37.5 mm (3.2 x 2.4 x 1.5”) and weight is 64 g (2.25 oz.).
Orthophosphates are present in water from the natural weathering of mineral deposits, agricultural runoff, untreated sewage, fertilizers and, as an addition to drinking water, to inhibit corrosion. Phosphate photometers are used by researchers, manufacturers, and individuals to measure phosphate levels in the environment, and in the home.
Hanna Instruments manufactures a wide variety of analytical instrumentation, including pH meters, multi-parameter meters, electrodes, chemical reagents, and buffer solutions. Founded in 1978, Hanna is headquartered in Woonsocket, RI, with subsidiaries in 32 countries. Hanna Instruments holds many firsts in the field of analytical instrumentation, including a pH electrode with a built-in temperature sensor, an electronic pocket-sized pH tester, and a replaceable electrode pH pocket tester. To ensure the quality of its products, Hanna is a vertically integrated manufacturer and does not subcontract any part of its manufacturing.
What’s in the Box?
- Sample cuvettes with caps (2)
- Powder reagents for phosphate (6)
- Battery
- Instructions
james
Reviewed in the United States on February 24, 2025
works fine
james
Reviewed in the United States on February 24, 2025
works fine
Samuel Snider
Reviewed in the United States on July 11, 2022
I have been in this hobby for 12 years and have a SPS dominant tank and he compared this with other kits and all were pretty close to each other except this one. It was reading. 04 and all other 4 test were reading between 1.1 and 1.2, so just to say SAVE your $$$$MONEY$$$$
Samuel Snider
Reviewed in the United States on July 11, 2022
I have been in this hobby for 12 years and have a SPS dominant tank and he compared this with other kits and all were pretty close to each other except this one. It was reading. 04 and all other 4 test were reading between 1.1 and 1.2, so just to say SAVE your $$$$MONEY$$$$
juanrbc
Reviewed in the United States on August 17, 2021
I bought this product to get accurate measurements of phosphate in my planted fresh water aquarium. High phosphate in a fresh water aquarium can lead to algae growth. I love this checker as it displays the results in actual numbers instead of a color chart that most other kits use.
juanrbc
Reviewed in the United States on August 17, 2021
I bought this product to get accurate measurements of phosphate in my planted fresh water aquarium. High phosphate in a fresh water aquarium can lead to algae growth. I love this checker as it displays the results in actual numbers instead of a color chart that most other kits use.
Tam
Reviewed in the United Kingdom on October 14, 2017
Fantastic accurate results, quick and easy to use.
Tam
Reviewed in the United Kingdom on October 14, 2017
Fantastic accurate results, quick and easy to use.
samstuart
Reviewed in the United Kingdom on May 11, 2016
Over priced
samstuart
Reviewed in the United Kingdom on May 11, 2016
Over priced
AJ
Reviewed in the United States on January 6, 2015
I picked up this unit as i was sick of trying to read 10 shades of light blue for other tests i have purchased. Comes in a nice box with everything you need to test (though i wish more than 6 came with the unit). Always a slight learning curve but i find it much easier than other tests. Few things to note from use and online reading:-use the same vial for blank and testing (if the glass gets stained slightly or dirty, it will zero the unit improperly)-wipe off the vial prior to blanking and reading-have the packet ready to add so that as soon as blanking is done, you can mix in the powder. After two minutes the unit shuts off so best to ready.I can't comment on how accurate this unit is vs other tests or repeatable as i have not tested this. I can only say i really just go for relative numbers on my saltwater tank, not down to the second digit.Only negative would be getting the powder in is a bit of pain but not the end of the world.
AJ
Reviewed in the United States on January 6, 2015
I picked up this unit as i was sick of trying to read 10 shades of light blue for other tests i have purchased. Comes in a nice box with everything you need to test (though i wish more than 6 came with the unit). Always a slight learning curve but i find it much easier than other tests. Few things to note from use and online reading:-use the same vial for blank and testing (if the glass gets stained slightly or dirty, it will zero the unit improperly)-wipe off the vial prior to blanking and reading-have the packet ready to add so that as soon as blanking is done, you can mix in the powder. After two minutes the unit shuts off so best to ready.I can't comment on how accurate this unit is vs other tests or repeatable as i have not tested this. I can only say i really just go for relative numbers on my saltwater tank, not down to the second digit.Only negative would be getting the powder in is a bit of pain but not the end of the world.
Brandon
Reviewed in the United States on July 20, 2014
This is the only Hanna tested out of the three I've tried that seems to be consistent. I've tried the Calcium and the Alk test. Both which I did not care for and stopped using. The phosphate test is simple to use. I was not happy at all with the amount of tests it came included with. The calcium tested came with a lot I don't remember how many but the Phosphate came with I believe 6. Overall it's a decent test but for the price I would go with another brand.
Brandon
Reviewed in the United States on July 20, 2014
This is the only Hanna tested out of the three I've tried that seems to be consistent. I've tried the Calcium and the Alk test. Both which I did not care for and stopped using. The phosphate test is simple to use. I was not happy at all with the amount of tests it came included with. The calcium tested came with a lot I don't remember how many but the Phosphate came with I believe 6. Overall it's a decent test but for the price I would go with another brand.
lacey nicole huyett
Reviewed in the United States on March 24, 2014
i have a reef aquarium. I use the best test kit that available. the red sea test kit. its so hard to get an accurate reading when you're trying to match colors. when the color for 0 is so close to the color for 0.08. so I tried this as my first digital tester. I love it. worth the money and makes testing as accurate as possible.
lacey nicole huyett
Reviewed in the United States on March 24, 2014
i have a reef aquarium. I use the best test kit that available. the red sea test kit. its so hard to get an accurate reading when you're trying to match colors. when the color for 0 is so close to the color for 0.08. so I tried this as my first digital tester. I love it. worth the money and makes testing as accurate as possible.
Hayley Moralez
Reviewed in the United States on May 29, 2013
I have been impressed with the accuracy of this meter. I had used the API test kits for some time and there were some issues with the readings when I compared them to my local LFS. So I paid the extra cash for this device and have been impressed. It's a quick and simple process. My only complaint is that I wish the replacement packets were cheaper or you received more. Otherwise this is a good buy for the committed hobbyist.
Hayley Moralez
Reviewed in the United States on May 29, 2013
I have been impressed with the accuracy of this meter. I had used the API test kits for some time and there were some issues with the readings when I compared them to my local LFS. So I paid the extra cash for this device and have been impressed. It's a quick and simple process. My only complaint is that I wish the replacement packets were cheaper or you received more. Otherwise this is a good buy for the committed hobbyist.
RGillund
Reviewed in the United States on March 2, 2012
I have an sps dominated reef and it is an absolute must to know what phosphate levels are in order to maintain optimal coloration of sps corals. Too high and the corals will turn brown and ugly. Too low and you will most likely see very slow growth, so there is a range that corals should be kept in. I shoot for .02-.03 normally.Saying that, I have tried many different test kits. All of the manual test kits are rather lengthy to use and the process is a big pain. Things need to be timed and measured and counted and you need a calculator etc etc. Those test kits aren't cheap either. If you think of buying and trying two or three test kits you would have paid for this.There are other meters out there. They are called photometers. Most of them are lab tools and are pricey $200+. They work good I have used them before but I don't think the difference between these and one of the lab intended units is worth the price difference.This unit is consistent and easy to use.I didn't give it 5 stars because when I was trying to open the unit to put the battery in, the tab on the unit broke! Before I even got to use it once. I was so disappointed in myself. I wasn't pulling hard but it happened. The unit is still usable, it's just a little more of a pain and not the way it would be had I not broke it. It is possible there was a crack before hand from the factory because I feel like if it really is this flimsy there is a problem (so the 4 stars instead of 5).I can't really ask for an exchange since I think I actually did break it, but like I said maybe it was cracked or something before. I just can't see the unit being that easy to snap.If you have a reef tank do yourself a favor and buy this or any of the Hanna meters but...BE CAREFUL opening it to put the battery in!
RGillund
Reviewed in the United States on March 2, 2012
I have an sps dominated reef and it is an absolute must to know what phosphate levels are in order to maintain optimal coloration of sps corals. Too high and the corals will turn brown and ugly. Too low and you will most likely see very slow growth, so there is a range that corals should be kept in. I shoot for .02-.03 normally.Saying that, I have tried many different test kits. All of the manual test kits are rather lengthy to use and the process is a big pain. Things need to be timed and measured and counted and you need a calculator etc etc. Those test kits aren't cheap either. If you think of buying and trying two or three test kits you would have paid for this.There are other meters out there. They are called photometers. Most of them are lab tools and are pricey $200+. They work good I have used them before but I don't think the difference between these and one of the lab intended units is worth the price difference.This unit is consistent and easy to use.I didn't give it 5 stars because when I was trying to open the unit to put the battery in, the tab on the unit broke! Before I even got to use it once. I was so disappointed in myself. I wasn't pulling hard but it happened. The unit is still usable, it's just a little more of a pain and not the way it would be had I not broke it. It is possible there was a crack before hand from the factory because I feel like if it really is this flimsy there is a problem (so the 4 stars instead of 5).I can't really ask for an exchange since I think I actually did break it, but like I said maybe it was cracked or something before. I just can't see the unit being that easy to snap.If you have a reef tank do yourself a favor and buy this or any of the Hanna meters but...BE CAREFUL opening it to put the battery in!
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