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Hanna Instruments HI701 Handheld Colorimeter Review

3

·

Very good

Revainrating 4 out of 5  
Rating 
4.0
🔬 Substance Analysis Instrumentation, 🔍 Test, Measure & Inspect

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img 1 attached to Hanna Instruments HI701 Handheld Colorimeter
img 2 attached to Hanna Instruments HI701 Handheld Colorimeter

Description of Hanna Instruments HI701 Handheld Colorimeter

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.

Reviews

Global ratings 3
  • 5
    2
  • 4
    0
  • 3
    0
  • 2
    1
  • 1
    0

Type of review

Revainrating 5 out of 5

Simple and effective test

Compared to the HI 729 fluoride test, this one is very simple. Before adding a reagent, zero the instrument with a water sample. After zeroing, add the powdered reagent, shake for 20 seconds, and then wait two minutes and thirty seconds to get the test result.

Pros
  • Colorimeter
Cons
  • Some errors

Revainrating 2 out of 5

Expected results were not obtained

The results I received with this test kit made no sense based on other information I had about our water supply. I then bought a Hach CN-70 chlorine test kit which gave me a reasonable reading. Maybe I did something wrong, but I ran the tests twice and followed the instructions. The test kit is easy to use.

Pros
  • Substance tester
Cons
  • Crumpled packaging

Revainrating 5 out of 5

More flexible than it looks

Some tools are specially limited to encourage purchase. I believe this is one of those tools. It turns out that there are multiple wavelengths and times for different measurements. The wavelength is determined by the color of the LED, and the resistance at the base of the device apparently determines the countdown time. This means that multiple parameters can be measured with a single instrument if the reagents and reaction times are right. With two cuvettes, the free chlorine tester can be…

Pros
  • Industrial & Scientific
Cons
  • You could choose a newer model