eXact® Strip DPD-3 Combined Chlorine offers a safe and convenient delivery system for your DPD testing. Must be used in conjunction with eXact® Strip DPD-1 Free Chlorine for Combined/Total Chlorine testing. There are no more tablets to crush, powders to spill, or dispensers that release irritating dust. All reagents, as identified in the AWWA Handbook (4500-Cl G.), are delivered from the eXact® Strip pads. Can be used with most 10 ml DPD Combined/Total Chlorine photometer systems.