Two types of chlorine ...

Two types of chlorine sensors are available. One is designed for flow cell installation, and the other is for submersion applications. Free chlorine monitoring should always be done using a flow cell system. Good control of sample flow and pressure is important for accurate measurement. The standard constant-head flow cell should be used for most applications. A sealed flow cell and a low-volume flow cell are also available for special applications. Submersible combined chlorine sensors can sometimes be used for measuring total chlorine in wastewater effluent.