DPD No. 3 Powder Pillows for Total Chlorine

Overview

DPD No. 3 powder pillows complete the chlorine picture. Used after a free chlorine reagent on the same sample, they develop the colour for total chlorine, and the difference between the two readings is the combined chlorine that points to ammonia in the water.

Key features

• Gives total chlorine, and combined chlorine by difference from the free reading
• Pre-measured sachets, so nothing has to be weighed out on the bench
• Sealed individually, which keeps the reagent dry and the dose consistent
• Supplied in packs of 50 and 100 powder pillows, each with its own item code

DPD No. 3 powder pillows specifications

Applications

Potable water and SANS 241 compliance monitoring, wastewater effluent disinfection, cooling water carrying ammonia, and pools tracking chloramines.

Why buy DPD No. 3 powder pillows from Hadron Group

Hadron Group supplies water treatment chemicals, dosing equipment and analytical products throughout South Africa and the SADC region. We hold DPD No. 3 powder pillows in stock, we can supply the matching photometer, cuvettes and spares, and our technical team will help you settle on the right test set for your plant. Browse the full reagent range or ask us for a quote.

Frequently asked questions

Why does combined chlorine matter?
Combined chlorine is chlorine bound to ammonia and organics. It disinfects poorly and carries the familiar chlorine smell, so a rising figure usually means a higher dose is due.

Why use powder pillows instead of tablets?
A pillow is a pre-measured dose in a sealed sachet, so there is nothing to weigh out and no part-used tablet strip. Where a method is only offered in powder form, the pillow is what the instrument expects.

How should powder pillows be stored?
Keep them cool and dry in their sealed sachets, work through the oldest box first, and open a pillow only at the moment you dose the sample.