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Free Chlorine Colorimeter - Checker HC
Get accurate water testing results with the HI701 Free Chlorine Colorimeter. With a digital read out, there is no more struggling to determine colors visually. This free chlorine tester's compact design fits in your pocket or stores easily in your shop.
- Easier to use and more accurate than chemical test kits.
- One-button operation makes getting your free chlorine results simple.
- Great for water quality, environmental testing, and pools & spas.
The HI701 Checker HC (Handheld Colorimeter) is a simple, accurate and cost effective way to measure free chlorine. Free chlorine is the active form of chlorine used for disinfection of drinking water, swimming pools and spas, and vegetable rinse water. Free chlorine in water is also harmful to a reverse osmosis membrane and needs to be monitored for removal from source water prior to being used. Designed as a more accurate alternative to chemical test kits, the HI701 free chlorine meter provides quick, accurate results in a few easy steps.
Features at-a-glance
- For use with freshwater samples
- Dedicated to a single parameter
- Small size, big convenience
- Ideal for: Water Quality, Environmental, Education, Pools and Spas
Customer
2025-08-07 13:08:00
Is very ease of use and instructions are easy to follow. For those who are use to the old style of ppm total chlorine; remember this machine reads the free chlorine. If you have no prior experience with field water purification and testing or you work socking pools it won’t be second nature to you. For the later I know they will agree this is way easier. Also the reagent is a sold at a reasonable price.
Mark Vital
2025-06-27 17:24:01
Works well
Katrina Daniel
2025-06-06 14:36:14
I received the wrong product when I ordered, seller didn't try to contact me or correct the order, I had to return product and order again. I did not order from them again, I went straight to the product manufacturer.
Bass Cadet
2025-06-03 12:29:38
Some instruments are purposely limited to encourage additional purchases. I believe this is one of those instruments. It appears there are several wavelengths and times for different measurements. The wavelengths are determined by the LED color while a resistor in the base of the unit apparently determines the countdown time. In summary, it means a single unit can be used to measure multiple parameters as long as the reagents and reaction times are correct.With two cuvettes, the free chlorine checker can be used for both free and total chlorine as well as other 525nm based tests. I tried this with and tests and think it is an excellent alternative to Taylor test kits. The Taylor kits (K2005 in particular) require matching light shades of pink to determine chlorine levels. Even holding up to light is not always conclusive and the measurement tolerance is roughly ±0.5 PPM.This meter yields an easy to read number. All the difficulties of pouring the reagent and setting the timer are eliminated if the user simply takes two samples, uses one as the control, and then manually times the wait period (1 minute for free chlorine, 2.5 minutes for total chlorine). Just before the time is completed, put in the unreacted sample, let the unit take the baseline measurement, and then insert the reacted sample and let the checker do its magic. I compared the results to the Taylor test kit and obtained relatively similar readings. The Taylor test kit I have is quite old and the reagents are well past expired (thus the reason for buying this checker). I also used this checker with the Taylor reagents and also obtained relatively similar readings. I purchased 100 test packs for both free and total chlorine so I am set for a while. Note that the Hanna reagents require pH less than 8.2. My pH was high and I did not get useable readings until I lowered the pH to below 8.0.This tester may also be used with other 525nm tests. I have a saltwater aquarium and wanted to check the phosphate/phosphorus levels. The measured 0.70 PPM. I don't have any algae problems so this seems reasonable. I recently ordered the HI 713-25 phosphate reagents and will compare the readings. I also have some HI 721-25 iron reagents but have not tested with it yet.If anything, I might recommend the for its 3.50 PPM range. The HI 701 is limited to 2.50 PPM. Both have 0.01 PPM resolution and ±0.03 PPM accuracy.
Dan
2025-04-29 09:36:46
Works fine as a cheap alternate but shouldn't be your daily checker.Mines in for repairs so I bought this one while it's out.
Greg G.
2025-04-20 14:56:20
Compared to the HI 729 Fluoride test, this one is really simple. You zero the device using your sample water before you add the reagent. Once it is zeroed, you add the powdered reagent, swirl it around for 20 seconds, then wait two minutes and thirty seconds for the test result.
don
2025-04-18 14:24:05
Works better than my $700 hach unit that don’t last much more than a year
Columbia
2025-04-10 15:49:53
The Hanna HI 701 is a very nice little colorimeter and it works well. I was a little disappointed with some accessories. The opening to the bottle is so small it needs to be shaken to empty water from it. Also, the reagent package doesn't open very widely so it is tricky to pour the reagent without some of it spiling outside the narrow bottle opening.Overall I am happy with my purchase.
Gisele Goodman
2025-02-26 09:33:42
It's our second tester. We used the other for 3 years 4 times a day. Great investment
Antonio G.
2025-02-05 13:11:51
muy sencillo y práctico
Petra
2025-02-01 16:30:23
Muss Geduld haben damit umzugehen.Hatte noch keine Zeit
Leoni Hallam
2025-01-07 11:32:34
Unfortunately, I didn't test it before the return it date expired, so I'm stuck with a product that cost way too much and doesn't work according to their instructions.. :(
Manuel R
2024-12-08 11:28:42
Envio súper rápido. El medidor funciona a las mil maravillas, es de lo mejor por no decir el mejor y el vendedor y el envÃo de 10!
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