Hanna Instruments Free Chlorine Test Kit Replacement Reagents 50 Tests (0.0–2.5 mg/L) (HI3831F-050)

Hanna Instruments Free Chlorine Test Kit Replacement Reagents 50 Tests (0.0–2.5 mg/L)

The HI3831F-050 is a set of genuine Hanna Instruments replacement reagents designed for the HI3831F Free Chlorine Test Kit. Each set contains enough pre-measured reagent solution for approximately 50 colorimetric tests, covering a free chlorine range of 0.0 to 2.5 mg/L (ppm). Ideal for pool owners, spa operators, and water treatment technicians who need reliable, repeatable free chlorine readings.

How it works

These reagents use the DPD (N,N-diethyl-p-phenylenediamine) colorimetric method: when added to a water sample, the DPD reagent reacts instantly with free chlorine to form a pink-to-red coloured complex. The deeper the colour, the higher the chlorine concentration. The reading is then compared against the HI3831F colour comparator cube for a fast, accurate visual result — no electronic instruments required.

Compatibility

The HI3831F-050 replacement reagents are exclusively compatible with the Hanna Instruments HI3831F Free Chlorine Test Kit. They allow you to refresh an existing kit without purchasing a new one, making them a cost-effective choice for ongoing pool and water quality monitoring. Each bottle is clearly labelled with its lot number and expiration date for full traceability.

Why genuine reagents matter

Genuine Hanna Instruments reagents are manufactured in Hanna’s own facilities to strict quality standards, ensuring consistent colour development and accurate results test after test. Using off-brand or expired reagents can lead to false readings and unsafe chlorine levels in your pool or spa water — always choose genuine HI3831F-050 replacement reagents for peace of mind.