The REGAL Model CRA 5000 Chlorine Residual Analyzer by Regal Gas Chlorinators
is designed to continuously measure the level(s) of free and/or total
chlorine in the disinfection process of water and wastewater. The CRA
5000 may be used exclusively to monitor chlorine residual levels or it
may be integrated with the REGAL Model 7009/7010 SMARTVALVE™ for
compound loop (feedback) chlorination and/or feed forward
dechlorination.