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Hanna Instruments HI701 Checker HC Handheld Colorimeter for Free Chlorine

4.1 out of 5 stars 181 ratings
$57.00
FREE Returns
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Purchase options and add-ons

Brand Hanna Instruments
Recommended Uses For Product Water Quality, Environmental Testing, Pools & Spas
Unit Count 1.0 Count
Manufacturer Hanna Instruments
UPC 611517433696

About this item

  • More accurate than chemical test kits, less expensive than professional testing
  • Single button operation for ease of use
  • Uses EPA approved diethyl-p-phenylenediamine (DPD) method, for uses have these requirements
  • Large LCD screen for readability
  • Auto shut-off to extend battery life
› See more product details

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Hanna Instruments HI701 Checker HC Handheld Colorimeter for Free Chlorine
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Product details

  • Is Discontinued By Manufacturer ‏ : ‎ No
  • Product Dimensions ‏ : ‎ 50 x 50 x 50 inches; 10.58 ounces
  • Item model number ‏ : ‎ HI-701
  • Batteries ‏ : ‎ 2 A batteries required.
  • Date First Available ‏ : ‎ December 3, 2009
  • Manufacturer ‏ : ‎ Hanna Instruments
  • ASIN ‏ : ‎ B003IKNJMA
  • Customer Reviews:
    4.1 out of 5 stars 181 ratings

Important information

Directions

1. Remove the colorimeter from its packaging, 2. Insert the AAA battery, 3. Prepare a sample by following the recommended sample preparation method, 4. Dip the colorimeter probe into the sample, 5. Press the single button to initiate the test, 6. Wait for the test to complete, and 7. Read the results from the LCD screen.

Product Description

HI701

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.

HI701

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

Range 0.00 to 2.50 ppm
Resolution 0.01 ppm
Accuracy @ 25°C/77°F ±0.03 ppm ±3% of reading
Light Source LED @ 525 nm
Light Detector Silicon photocell
Method Adaptation of USEPA method 330.5, DPD method
Battery Type (1) 1.5V AAA
Auto-off After two minutes of non-use
Environment 0 to 50°C (32 to 122°F); RH max 95% non-condensing
Dimensions 86.0 x 61.0 x 37.5 mm (3.4 x 2.4 x 1.5”)
Weight 64 g (2.3 oz)
Ordering Information HI701 Checker HC is supplied with sample cuvettes with caps (2), free chlorine reagent starter kit (reagents for 6 tests), battery, instructions and quick start guide.
Reagent Set HI701-25 (25 tests)
Calibration Set HI701-11

Product guides and documents

User Manual (PDF)

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Customer reviews

4.1 out of 5 stars
181 global ratings

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Customers say

Customers find the colorimeter works well as a cheap alternative and is simple to use. They appreciate its accuracy, with one customer noting ±0.03 PPM precision, and consider it reasonably priced.

AI-generated from the text of customer reviews

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15 customers mention "Functionality"13 positive2 negative

Customers find that the test strip works well, with one mentioning it serves as a good alternative to more expensive options.

"Works well" Read more

"The Hanna HI 701 is a very nice little colorimeter and it works well. I was a little disappointed with some accessories...." Read more

"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." Read more

"Works well, does the job and the price was right compared to 550...." Read more

8 customers mention "Ease of use"6 positive2 negative

Customers find the test strip simple to use.

"Is very ease of use and instructions are easy to follow...." Read more

"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...." Read more

"- Cumbersome to use : you have to mess around with little pouches with small amounts of powder, hard to get into bottle without spilling. -..." Read more

"...The test kit is easy to use." Read more

3 customers mention "Accuracy"3 positive0 negative

Customers are satisfied with the test strip's accuracy, with one customer noting its ±0.03 PPM precision.

"...Both have 0.01 PPM resolution and ±0.03 PPM accuracy." Read more

"Good meter minor issues..." Read more

"Decent meter...." Read more

3 customers mention "Value for money"3 positive0 negative

Customers find the colorimeter to be reasonably priced, with one mentioning it's a non-expensive way to get accurate measurements.

"...Also the reagent is a sold at a reasonable price." Read more

"Works well, does the job and the price was right compared to 550...." Read more

"Simple to use, and a non expensive way to have accurate measures!..." Read more

Top reviews from the United States

  • Amazon Customer
    5.0 out of 5 stars Great little machine
    Reviewed in the United States on April 3, 2022
    Verified Purchase
    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.
    3 people found this helpful
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  • Mark Vital
    5.0 out of 5 stars Perfect choice
    Reviewed in the United States on August 9, 2024
    Verified Purchase
    Works well
    Helpful
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  • Katrina Daniel
    1.0 out of 5 stars Wrong Product sent
    Reviewed in the United States on August 22, 2024
    Verified Purchase
    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.
    One person found this helpful
    Helpful
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  • Bass Cadet
    5.0 out of 5 stars More flexible than it appears
    Reviewed in the United States on February 16, 2014
    Verified Purchase
    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 free chlorine and total chlorine 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 HI 736-25 phosphorus reagents) 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 Hanna Instruments HI 711 Total Chlorine checker 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.
    40 people found this helpful
    Helpful
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  • Columbia
    4.0 out of 5 stars Good meter minor issues
    Reviewed in the United States on November 14, 2011
    Verified Purchase
    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.
    8 people found this helpful
    Helpful
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  • Dan
    3.0 out of 5 stars Decent meter.
    Reviewed in the United States on January 23, 2016
    Verified Purchase
    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.
    Helpful
     Report
  • Greg G.
    5.0 out of 5 stars Simple, effective test
    Reviewed in the United States on August 25, 2013
    Verified Purchase
    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.
    7 people found this helpful
    Helpful
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  • don
    5.0 out of 5 stars Works fine
    Reviewed in the United States on July 24, 2023
    Verified Purchase
    Works better than my $700 hach unit that don’t last much more than a year
    Helpful
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Top reviews from other countries

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  • Petra
    2.0 out of 5 stars Wasserfest für Brunnenwasser
    Reviewed in Germany on February 28, 2023
    Verified Purchase
    Muss Geduld haben damit umzugehen.Hatte noch keine Zeit
    Report
  • Gisele Goodman
    5.0 out of 5 stars Chlorine tester
    Reviewed in Canada on June 1, 2023
    Verified Purchase
    It's our second tester. We used the other for 3 years 4 times a day. Great investment
    Report
  • Antonio G.
    5.0 out of 5 stars todo correcto
    Reviewed in Spain on September 6, 2024
    Verified Purchase
    muy sencillo y práctico
    Report
  • Leoni Hallam
    1.0 out of 5 stars Didn't work for me!
    Reviewed in Canada on July 12, 2023
    Verified Purchase
    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.. :(
    Report
  • Manuel R
    5.0 out of 5 stars Excelente
    Reviewed in Spain on September 22, 2023
    Verified Purchase
    Envio súper rápido. El medidor funciona a las mil maravillas, es de lo mejor por no decir el mejor y el vendedor y el envío de 10!
    Report