Digital RS485 Modbus or 4-20mA output Residual Chlorine Sensor

Digital RS485 Modbus or 4-20mA output Residual Chlorine Sensor

New Residual Chlorine Sensor,

it can be directly with RS485 Modbus or 4-20mA output.max pressure is 3bar
indicator
Free chlorine
reduced dependence on pH
Application
e. g. Swimming pool water, drinking water, sea water Surfactants (tensides) are partially tolerated.

Chlorination agents
inorganic chlorine compounds:
NaOCl (=sodium hypochlorite), Ca(OCl)2, chlorine gas, electrolytically generated chlorine
Measuring system
Membrane covered, amperometric potentiostatic 3-electrode system with electronic inside





Electronic
Analog version: - voltage output
- not galvanically isolated electronics
- analog internal data processing
- output signal: analog (analog-out/analog) Digital version: - electronic is completely galvanically isolated
- digital internal data processing
- output signal: analog (analog-out/digital)
or
digital (digital-out/digital) mA-version: - current output analog
- not galvanically isolated electronics
- output signal: analog (analog-out/analog)



Information about the measuring range of sensors with 4-20 mA
Slope of a sensor can vary production-related or application-related between 65% and 150% of the nominal slope

-> Recommendation to determine the suitable measuring range or the suitable sensor:
Concentration to be measured x factor 1.5 = measuring range of the sensor

Example: Concentration to be measured 1.6 ppm x 1.5 = 2.4
-> recommended sensor with a measuring range of 5 ppm
Accuracy
after calibration at repeatability conditions (25°C, pH 7.2 in drinking water) of the upper full scale
- Measuring range 2 mg/l: at 0.4 mg/l <1%
at 1.6 mg/l <1%
- Measuring range 20 mg/l: at 4 mg/l <1%
at 16 mg/l <3%
Slope drift
At repeatability conditions (25 °C, pH 7,2 in drinking water)

approx. -1% per month

Working temperature
Measuring water temperature: 0 … +45 °C
(no ice crystals in the measuring water)

Ambient temperature: 0 … +55 °C
Temperature compensation
Automatically, by an integrated temperature sensor Sudden temperature changes must be avoided

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