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Hanna Checker for Chlorine Breakthrough


bob115

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As the title says, is it worth getting the total chlorine Hannah checker for measuring chlorine breakthrough? Compared to the LaMotte test strips it offers similar cost per test, much greater resolution, and increased accuracy. Obviously upfront cost is much greater, its more involved to use, and its more junk to have lying around.

 

In my specific use case, my city's water is reported to have between .2ppm and .4ppm, so the lowest graduation on the test strips is already what I get coming from the tap. Though I suppose seeing any color change at all is enough indication that its probably time to switch carbon blocks, but that can get a little finicky with lighting and such.

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  • 2 weeks later...

I use the Hanna free chlorine tester in my water operations business for potable drinking water testing and have been pretty happy with it. The few things I will tell you is buy the calibration kit for it and check the calibration often and keep your glassware spotless. Even a little out of calibration when you are trying to test down in tenths of a ppm can be quite dramatic.

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  • 2 weeks later...

...and keep your glassware spotless. Even a little out of calibration when you are trying to test down in tenths of a ppm can be quite dramatic.

 

 

+1

 

Glassware – the use of actual lab equipment – is probably the #1 biggest difference between these Checkers and the kits most folks are used to. And the source of most of the complaints. The do require attention to some different details than someone might be used to.

 

Spotless is no exaggeration. I even recommend folks buy Hanna's cleaner cloths (or something like them) if they are available....price is reasonable, you can dedicate one just for this purpose and no other, and they are MUCH better than about any other solution.

 

(That eliminates any doubt, but any good lint-free cloth will work if you know what you're picking – natural fiber or these microfiber options.)

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Typically the more tedious the method, the more accurate. So you will have to be mindful of scratches and fingerprints and floaters in the solution interfering with the light detection, but I like the more reliable and accurate result.

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