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Chlorine Sensor
CROSS SMART SENSOR
DG7-FC: Free Chlorine Sensor
Reduced pH dependence
The DG7-FC is a panel-mount, ready-to-use Free Chlorine Sensor. It is designed to monitor free chlorine in drinking water, rinse water,
cooling water and any other fresh water samples. The sensor provides two measurement ranges, the standard 0.05~10.00ppm, and
the extended 0.01~5.00ppm for low values. The DG7-FC is compliant with EPA method 334.0 for measuring drinking water
INTRODUCTION
Free Chlorine exists in a pH-dependent solution with a mixed ratio of hypochlorous acid (HOCl) (~100% at pH 5) and OCl- (~100% at pH 10). Free Chlorine is the sum of HOCl and OClin the sample.
The Free Chlorine Sensor measures only the HOCl component whereby the analyzer calculates the balance of the free chlorine components by either a measured or a user defined value and finally gives out the free chlorine number. The utilization of the
pH sensor provides an accurate compensation for samples with pH between 6 and 9.5, which eliminates the expensive sample conditioning system commonly required for controlling the pH of the test solution.
SPECIFICATIONS
| Measuring system | Membrane-covered, amperometric 3-electrode system with integrated electronic |
| Range | (0.05~5.00/10.00)mg/l, ppm |
| Accuracy | 0.005mg/l (0~2.000) mg/l, ppm 0.05mg/l (0~20.00) mg/l, ppm |
| Resolution | 0.001mg/l |
| Repeatability | ±1%FS |
| Operate Temp. | 41 to 149 °F (5 to 65 °C) |
| Temp. Compensation | Automatically, by an integrated temperature sensor |
| Operating Pressure | Max. 0.5 bar, no pressure impulses and/or vibrations |
| Sample Flow Rate | 30L/h |
| pH-range | pH 4 to pH 9, reduced pH dependence |
| Run-in Time | First start-up 2 hours |
| Response Time | T90: <2 min |
| Slope adjustment | At the device, by analytical determination of the chlorine concentration, DPD-1-method |
| Interferences | ClO2: Slope -75 mV/ppm, d. s. 75 % of the ClO2 concentration O3: Slope -80 mV/ppm, d. s. 80 % of the O3 concentration Combined chlorine may increase the measurement value! |
| Power | 24VDC, 40mA |
| Digital Interface | RS485 Modbus RTU |
| Material | Microporous hydrophilic membrane , PVC-U, 316SS |
| Dimensions | Diameter: 1” (25.4 mm). Length: 8.07” (205 mm) |
| Spare parts | Membrane cap: M48.1G Electrolyte: ECS2.1/GEL |
ORDER CODE
| DG7-FC: Free Chlorine Sensor with panel and flow cell | ||
| -H Low range for 2ppm | ||
| -N High range for 20ppm | ||
| -C10 10’ cable | ||
| -C20 20’ cable | ||
| -C30 30’ cable | ||
| Other length contact factory. | ||
| DG7-FC | -N | -C30 |
Terminals
BAC-Series
Single or dual-channels
BA-Multiparameter
Multi-channels up to eight
BAC-EX
Single channel Ex-proof
