November 2004

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HP Water Management: Should you install an online hardness analyzer?

Manufacturers have improved the reliability of online hardness analyzers, increasing the feasibility to automate many water treatment units. The most common applications are boiler feedwater quality a..

Huchler, L. A., MarTech Systems, Inc.

Manufacturers have improved the reliability of online hardness analyzers, increasing the feasibility to automate many water treatment units. The most common applications are boiler feedwater quality and cation softener end-of-run length. Proper selection and implementation of online hardness analyzers is critical to maximize return on investment. As shown in Table 1, there are two types of analyzers: ion specific electrode (ISE) and spectrophotometric. Both analyzers use an EDTA-based titration;* however, the detector technology is different.    TABLE 1. Summary of hardness analyzer

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