8.6.22.9.21- 10.12.22-11.22. 4-20 mA output with MODBUS RTU and Alarm Relays Flexible configurations for all applications. Your satisfaction is important to me. Electro chemical devices transmitter t80 cl2 sensor total chlorine analyzer video will open in a new window. Use with ECD Digital Intelligent Sensors that are factory calibrated sensors and store data.