DPD No. 1 Powder Pillows for Free Chlorine

Overview

DPD No. 1 powder pillows measure free chlorine, the fraction of the residual still available to disinfect. The reagent gives a pink colour whose depth the instrument converts to a reading, which makes this the everyday check on potable water plants, reticulation systems, pools and cooling circuits.

Key features

• Reads free chlorine, the disinfecting fraction, rather than total chlorine
• 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. 1 powder pillows specifications

Applications

Potable water disinfection and SANS 241 monitoring, reticulation and reservoir sampling, swimming pools and spas, cooling towers, and food and beverage plants.

Why buy DPD No. 1 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. 1 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

What is the difference between free and total chlorine?
Free chlorine is what is still available to disinfect. Total chlorine adds the combined fraction that has already reacted with ammonia and organics, and the gap between the two is the combined chlorine.

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.