Residual chlorine monitorThe Q46H residual chlorine monitor from Analytical Technology uses a polarographic membrane sensor to measure chlorine directly, without chemical reagents. Automatic pH compensation may be added for the most accurate free chlorine measurement. Monitors are available with one of three digital communications protocols (Modbus/Profibus/Ethernet) or three 4-20 mA outputs for chlorine, pH and temperature. Units are available pre-wired and pre-plumbed with optional sample flow controls. 800/959-0299; www.analyticaltechnology.com.
Process monitoring and controls systemThe BNR IntelliPro process monitoring and controls system from Aqua-Aerobic Systems has automatic adjustment capabilities for biological nutrient removal (BNR), and chemical addition. The system provides a link
