Is it this model (LPV445.97.00110) is for testing free chlorine ?

Yes this instrument can measure free and total chlorine, you would just need to get the corresponding reagent.

Can you tell me the reagent I need to purchase for testing free chlorine?

For free chlorine analysis you will need Hach item 2105569.

Is it necessary to use the Claros program, or can I just read the chlorine results individually without it?

sure you can read directly on meter display. Claros is just an optional added value. currently unit comes with Bluetoo and 90 days free Claros program access

What range does this dr300 free/total chlorine meter have?

This model has a low-range covering 0.02 - 2.00 mg/L Cl2 and a high-range from 0.1 - 8.0 mg/L.

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💧 Stay ahead of water quality with precision and durability in your pocket!

REGULATORY READY - EPA-compliant testing with Hach-approved reagents keeps your results credible and audit-proof.
COMPACT POWERHOUSE - Lightweight, portable design with a rugged carry case—perfect for on-the-go professionals demanding reliability.
BUILT FOR THE FIELD - IP67 waterproof rating means it thrives in rain, dirt, and drops—your ultimate outdoor testing companion.
EFFORTLESS OPERATION - Intuitive interface paired with a large backlit screen ensures accurate readings anytime, anywhere.
PRECISION YOU CAN TRUST - Measures Free & Total Chlorine with lab-grade accuracy for flawless water quality insights.

The HACHDR300 Pocket Colorimeter delivers precise Free and Total Chlorine measurements across low and high ranges, featuring a rugged IP67 waterproof design and a large backlit display for easy use in any environment. EPA-compliant and portable, it’s the trusted choice for professionals requiring reliable, field-ready water quality testing.