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💧 Stay ahead in water quality—because precision is power.
Hach DPD Free Chlorine Reagent Powder Pillows offer EPA-certified, ultra-precise chlorine testing within a 0.02-2.00 mg/L range. Packaged in a convenient 100-count set, these pre-measured reagents are designed for seamless use with Hach colorimeters, making them ideal for professional drinking water and wastewater analysis across diverse water sources.






| Customer Reviews | 4.8 out of 5 stars 267 Reviews |
P**P
They worked great
Good buy, great company i had missing products and they sent me replacement pouches
L**W
Good Price
I have to use these every day to check the chlorine for our neighborhood water system. It’s a much better price than buying them through our well contractor.
A**R
simple and easy to open packets
The packets are what we need to tell the chlorine levels in our drinking water with in our community well
O**Y
Appear to be genuine Hach test pillows.
These have worked fine and have had no issues with them.
J**S
HACH
GREAT
R**.
Good source of Hach Products.
Hach dpd free chlorine testing pillow are well packaged and easy to use. Have long use periods before expiration but be sure to check the expiration date when you first get the package. Manufactured by Hach but sold by many people.
D**E
Good price and quick delivery
This is the third time I have ordered this product. From order to delivery, everything goes well with no problems.
B**A
It works
Thanks to this I can accurately test the Free Chlorine levels in my water samples with the DR 900.
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