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User Guide For Free Chlorine
Sensor with Analog output A420-
FCL
A420-FCL-01
JUN-2021
This document is applied for the following products
1. Introduction
Free Chlorine Sensor with Analog output A420-FCL
The Chlorine Electrode is an amperometric (or polarographic) electrode (or "probe") used for continuous measurement
of chlorine in drinking water, swimming pools, spas, industrial applications, or dirty/colored samples where colorimetric
methods are inadequate. A 3-electrode system is employed for ensuring good linearity between the output and the
chlorine concentration (up to 50 ppm). The bound membrane sensor cap provides good stability and durability for this
product. In addition, our proprietary Internal Filled Gel (IFG) significantly reduces the electrode measurement's pH
dependence.
In principle, the chlorine electrode measures the total chlorine of the water sample via the measurement mechanism
described below. However, free chlorine measurement is also feasible when the chloramine concentration is negligible
or constant and calibrated for free chlorine.
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