Hardness Analyzer for Drinking and Process Water

Aug. 8, 2019
The Liquiline System CA80HA from Endress+Hauser helps optimize the control of water softening processes such as ion exchange or reverse osmosis, ensures quality of products influenced by water hardness, and analyzes feedwater used in boilers.

The colorimetric analyzer uses the phthalein purple method, ensuring direct comparability to lab results. It measures calcium carbonate (CaCO3) over a range of 0 to 80 mg/l with accuracy of ±0.5 mg/l. The analyzer has up to two measuring channels and up to four digital inputs for optional Memosens sensors such as pH, ORP, conductivity, oxygen, chlorine, turbidity, etc. With optional sensors it can measure and calculate pH from two conductivity values according to VGB Standard 405 for boiler feedwater; measure the difference between two measured values from different sources to monitor membranes; calculate differential conductivity to monitor the efficiency of ion exchangers; calculate degassed conductivity for process controls in power plants; and calculate rH from the measured values of a pH and an ORP sensor. Outputs from the unit can be used to directly control water processes as the process variables in a control loop, be assigned as a measured variable to a limit contactor, trigger cleaning, be sent to a control system for further analysis, and/or be displayed on the local graphic readout. The local graphic display has 240 x 160-pixel resolution, a red display background for alarms and user-definable measuring menus.

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Endress+Hauser, Inc.