Designed with polarographic technology, the FC80 Free Chlorine Sensor from Electro-Chemical Devices eliminates the need for expensive reagents, while providing highly accurate free-chlorine measurement performance for various industrial water treatment processes. The sensor is compliant with US EPA Method 334.0 for measuring drinking water. It also supports a wide variety of industrial process and plant applications, including rinse, cooling or other fresh-water sampling tasks. The sensor includes digital communication capabilities and features amperometric sensing and operates over a wide temperature range from 0-50°C (32-122°F). Response time is T90 in two minutes. The only maintenance required is the replacement of its economical electrolyte solution at intervals of up to 12 months. http://www.ecdi.com, [email protected]