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Product Details:
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| Product Name: | Total Chlorine Sensor | Product Model: | DCP4.0MA |
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| Measurand(s): | Total Chlorine Total Chlorine (= Free Chlorine + Bound Chlorine) | Conductivity: | 10 µS/cm – 200 MS/cm (brine) |
| PH Range: | PH 4 – PH 12, Reduced Dependence On PH-value | Pressure Range: | 0 ~ 3bar(Flow Cell) |
| Temperature Range: | 0 ~ 45 ℃ | Response Time: | T90: Approx. 3 Min. (brine Approx. 5 Min.) |
| Flow Rate: | 15-30 L/h (33 – 66 Cm/s) | ||
| High Light: | Contamination Resistant Three Probe,Medical Wastewater Contamination Resistant Three Probe,Low Conductivity Contamination Resistant Three Probe |
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Contamination Resistant Low Conductivity Three Probe For Sea Water Brine And Medical Wastewater
The DCP4.0MA three-electrode total chlorine sensor uses a membrane-attached method, and its detection principle is based on the selective adsorption of the membrane and the electrochemical response caused by concentration differences. The following are its main principles:
Selective film covering: The working electrode of the sensor is covered with a selective film. This membrane has high selectivity for chloride ions and is usually prepared from specific materials or compounds.
Chloride ion adsorption: When chloride ions in the water sample come into contact with the selective membrane, the chloride ions will be adsorbed to the membrane surface due to the characteristics of the membrane.
Charge change: The adsorption of chloride ions causes a charge change on the membrane surface. This change in charge can be received by the electrodes, producing a corresponding current or potential signal.
Electrochemical measurement: A system of electrodes in a sensor measures changes in electrical current or potential caused by changes in charge. This change is directly proportional to the concentration of chloride ions in the water sample.
Data processing: The sensor processes the measured current or potential signal through the internal circuit and converts it into a digital signal of total chlorine concentration or other related units.
The membrane-attached total chlorine electrode utilizes the adsorption characteristics of the selective membrane to chloride ions in the water sample, and indirectly measures the total chlorine content in the water sample by measuring the current or potential changes caused by the change in charge on the membrane surface. This method has fast response, high sensitivity and good selectivity, and is suitable for various application scenarios of water quality monitoring and control.
DCP4.0MA Total chlorine sensor Three-electrode system, used for drinking water, swimming pool water, service water, process water, sea water and salt water, direct drinking water (conductivity not less than 10μs/cm), medical sewage, pH 4~12, greatly reducing dependence on pH value. Resistant to pollution, low conductivity, almost no maintenance required, optional range 0~2/5/10/20/50ppm
Areas of application: Swimming pool water, drinking water, sea water, brine (15% NaCl) Surfactants (tensides) are partially tolerated.
Scope of supply: CP4 sensor, membrane cap, electrolyte
Specifications
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Item Number |
CP4.0 |
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| indicator |
Total chlorine (= free chlorine + bound chlorine) Reduced dependence on pH |
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| Application |
Swimming pool water, drinking water, sea water, brine (15% NaCl) Surfactants (tensides) are partially tolerated. |
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| Chlorination agents |
inorganic chlorine compounds: NaOCl (=sodium hypochlorite), Ca(OCl)2 , chlorine gas, electrolytically generated chlorine |
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| Measuring system | Membrane covered, amperometric potentiostatic 3-electrode system with electronic inside | |
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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) |
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Information about themeasuring range |
The actual slope of a sensor can vary production-related between 65% and 150% of the nominal slope Note: With a slope > 100% the measuring range is reduced accordingly. (Ex.: 150% slope → 67% of the specified measuring range) |
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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 <2%
at 1.6 mg/l <2%
- Measuring range 20 mg/l:
at 4 mg/l <1%
at 16 mg/l <3%
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Slope drift At repeatability conditions (25 °C, pH 7,2 in drinking water) |
approx. -1% per month | |
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Working temperature |
Measuring water temperature: 0 … +45 °C (no ice crystals in the measuring water) |
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| Ambient temperature: 0 … +55 °C | ||
| Temperature compensation |
Automatically, by an integrated temperature sensor Sudden temperature changes must be avoided |
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Max. allowed working pressure |
Operation without retaining ring: - 0.5 bar - no pressure impulses and/or vibrations |
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Operation with retaining ring in TARAflow FLC: - 3 bar, - no pressure impulses and/or vibrations (see option 2) |
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Flow rate (Incoming flow velocity) |
approx. 15-30 l/h (33 – 66 cm/s) in FLC, small flow rate dependence is given |
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| pH-range |
pH 4 – pH 12, reduced dependence on pH-value (see diagram last page of the data sheet “Slope of CP4 versus pH”) |
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| Conductivity | 10 µS/cm – 200 mS/cm (brine) | ||
| Run-in time | First start-up approx. 2 h | ||
| Response time | T90 : approx. 3 min. (brine approx. 5 min.) | ||
| Zero point adjustment | Not necessary | ||
| calibration |
At the device, by analytical determination, DPD-4-Method (DPD- 1 + DPD-3) |
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Cross sensitivities/ interferences |
ClO2 : factor 1 O3: factor 1.3 Corrosion inhibitors can lead to measuring errors. Stabilisers for water hardness can lead to measuring errors. |
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| Absence of the disinfectant | Max .24 h | ||
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Connection |
mV version: 5-pole M12, plug-on flange Modbus version: 5-pole M12, plug-on flange 4-20 mA version: 2-pole terminal or 5-pole M12, plug-on flange |
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| max. length of sensor cable (depending on internal signal processing) | analog | < 30 m | |
| digital |
> 30 m are permissible Maximum cable length depends on application |
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| Protection type |
5-pole M12 plug-on flange: IP68 2-pole terminal with mA-hood: IP65 |
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| material | Microporous hydrophilic Membrane, PVC-U, PEEK, stainless steel 1.4571 | ||
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Size |
diameter: Length: mV version approx.. 205 mm (digital signal processing) Modbus version approx. 205 mm 4-20 mA version approx. 220 mm (2-pole-terminal) approx. 190 mm (5-pole-M12) |
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| Transport | +5 … +50 °C (Sensor, electrolyte, membrane cap) |
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storage |
Sensor: dry and without electrolyte no limit at +5 … +40 °C |
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Electrolyte: in original bottle protected from sunlight at +5 … +35 °C min. 1 year or until the specified EXP-Date |
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Membrane cap: in original packing no limit at +5 … +40 °C (used membrane caps can not be stored) |
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maintenance |
Regularly control of the measuring signal, min. once a week The following specifications depend on the water quality: Change of the membrane cap: once a year Change of the electrolyte: once a year |
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EMC tested RoHS compliant |
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Option 1: Membrane cap M48.4S
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especially for applications in sea water or brine
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Option 2: Retaining ring |
- When operating with pressures >0.5 bar in TARAflow FLC - Dimensions retaining ring 29 x 23.4 x 2.5 mm, slitted, PETP - Different positions for groove selectable (on request)
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Spare parts
| Type | Membrane cap | Electrolyte | Emery | O-ring |
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All CP4.0 |
M48.4E Art. No. 11051-E |
ECP1.4/GEL, 100 ml Art. No. 11006.1 |
S1 Art. No. 11908 |
14 x 1.8 NBR Art. No. 11806 |
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For sea water or brine applications: M48.4S Art. No. 11051-S |
CP4.0 (digital output, digital internal signal processing)
- The power supply is galvanically isolated inside of the sensor.
- The output signal is galvanically isolated too, that means potential-free.
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Measuring range in ppm |
Resolution in ppm |
Output Output resistance |
Power supply | Connection |
| CP4.0H-M0c | 0.005… 2.000 | 0.001 |
Modbus RTU There are no terminating resistors in the sensor. |
9-30 VDC approx. 20-56 mA |
5-pole M12 plug-on flange Function of wires: PIN1: reserved PIN2: +U PIN3: power GND PIN4: RS485B PIN5: RS485A |
| CP4.0N-M0c | 0.05… 20.00 | 0.01 | |||
| CP4.0H-M4c * | 0,005… 2,000 | 0.001 |
(Subject to technical changes!)
CP4.0 4-20 mA (analog output, analog internal signal processing)
A potential-free electrical connection is necessary as the sensor electronic is not equipped with a galvanical isolation.
Electrical connection: 2 pole terminal clamp
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Measuring range
in ppm |
Resolution
in ppm |
Output Output resistance |
Nominal slope (at pH 7.2)
in mA/ppm |
Power supply |
Connection |
| CP4.0MA0.5 | 0.005…0.500 | 0.001 |
4…20 mA uncalibrated |
32.0 |
12…30 VDC RL 50Ω…RL 900Ω |
2-pole terminal (2 x 1 mm²)
Recommended: Round cable 4 mm 2 x 0.34 mm² |
| CP4.0MA2 | 0.005…2.000 | 0.001 | 8.0 | |||
| CP4.0MA5 | 0.05…5.00 | 0.01 | 3.2 | |||
| CP4.0MA10 | 0.05…10.00 | 0.01 | 1.6 | |||
| CP4.0MA20 | 0.05…20.00 | 0.01 | 0.8 |
(Subject to technical changes!)
Electrical connection: 5 pole M12 plug-on flange
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Measuring range
in ppm |
Resolution
in ppm |
Output Output resistance |
Nominal slope (at pH 7.2)
in mA/ppm |
Power supply |
Connection |
| CP4.0MA0.5-M12 | 0.005 …0.500 | 0.001 |
4…20 mA uncalibrated |
32.0 |
12…30 VDC RL 50Ω…RL 900Ω |
5-pole M12 plug- on flange Function of wires: PIN1: n. c. PIN2: +U PIN3: -U PIN4: n c. PIN5: n. c. |
| CP4.0MA2-M12 | 0.005…2.000 | 0.001 | 8.0 | |||
| CP4.0MA5-M12 | 0.05…5.00 | 0.01 | 3.2 | |||
| CP4.0MA10-M12 | 0.05…10.00 | 0.01 | 1.6 | |||
| CP4.0MA20-M12 | 0.05…20.00 | 0.01 | 0.8 |
(Subject to technical changes!)
Contact Person: Yuki Fu
Tel: +8615716217387
