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HI7609829‑11: Chloride ion selective electrode is a combination solid state sensor used for the detection
of free chloride ions in freshwater samples. The sensor utilizes a silver chloride pellet housed in a PEI
head and a silver/silver chloride double junction gel filled reference electrode. The outer body of the
sensor is the thermoplastic PEI. This sensor is used in place of the pH sensor in the probe.
The measurement of chloride, Cl¯ is a useful tool in the measurement of surface water contaminants
such as tracing the source of roadway run off or studying naturally occurring chloride levels in natural
waters. HI7609829‑11 is an ion selective sensor that responds to the free chloride ion. Chloride ion
is the ionized form of chlorine.
HI7609829‑11 is specified for 0.6 to 200.0 ppm (mg/L) Cl¯. The sensor responds in a Nernstian
manner (like a pH sensor) and produces a voltage that the meter converts to a concentration value.
APPENDIX C - ISE INFORMATION
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