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1-1

IM 12F5A1-01E

1. OVERVIEW

In recent years, measuring and monitoring the concentration of free available chlorine in water

distribution has become increasingly important for obtaining safe drinking water.

The FC400G free available chlorine analyzer (non-reagent type) is a process-use free available

chlorine analyzer utilizing a rotating electrode polarographic method for measurement.

Commercialized with minimum maintenance as a primary theme, the FC400G can continuously

measure the free available chlorine concentration without reagent use.

When you attempt to measure free available chlorine and the test solution contains combined

chlorine, there's an error which depends on the concentration of the combined chlorine. To reduce the

error in this sort of situation, we recommend that you use the combined chlorine insensitive version

of the Model FC400G that has been developed for this purpose. Compared with the standard Model

FC400G,theelectrodes,thebeads,andtheappliedvoltagearedi󰀨erent,buttheunitisotherwisethe

sameasthestandardModelFC400Gasregardsmeasurementprinciples,installation,specications

and performance.

Figure 1.1 shows the appearance of the FC400G free available chlorine analyzer.

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Figure1.1 FC400GFreeAvailableChlorineAnalyzer.

YOKOGAWA FC400G User Manual

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