Amperometric sensors for total and free chlorine CLT10 sc and CLF10 sc

Description

The CL10sc Series Reagent-Free Chlorine Analyzers provide real-time monitoring of disinfection processes, providing continuous readings of free or total chlorine levels, indicating changing water treatment conditions. The measuring range from 0 to 20 ppm provides process control in a wide range of applications where water disinfection and decontamination takes place.

CL10sc sensors are equipped with a self-diagnostic system to warn of changes in the process or the need to service the device. Diagnostic features include pH and chlorine calibration deviations warning, and a non-contact flow sensor to indicate insufficient sample flow. Measuring free or total chlorine with the CL10sc amperometric analyzer requires no reagents, eliminating the need for routine reagent replanishment and waste management.

The sensor should be installed in an accessible place. It can be installed on a flat vertical surface (such as a wall, panel, stand, etc.). It must provide access for any inspection or maintenance. The sample flow rate must meet the specifications below.

When ordering a sensor, specify the part number

The package includes a CL10sc series sensor, a 1m digital extension cable, a pH sensor depending on the model, and a user manual.

• LXV45A.98.23022 - CLF10sc free chlorine sensor with differential pHD sensor
• LXV45A.98.22022 - CLF10sc free chlorine sensor, combined pH sensor
• LXV45B.98.23022 - Total chlorine sensor CLT10sc with differential pHD sensor
• LXV45B.98.22022 - Total chlorine sensor CLT10sc, combined pH sensor

Various configurations are available, please contact us for more details and sensor selection for your application.

Principle of operation

Amperometry is an electrochemical method that measures the change in current as a result of chemical reactions occurring at the electrodes. The generated current is proportional to the analyte concentration. A typical amperometric sensor consists of two dissimilar electrodes; anode and cathode (i.e. silver / platinum or copper / gold, respectively).

Typically, the electrodes are covered with a membrane cover containing an electrolyte, which provides the best selectivity of the assay. In addition, a small, constant voltage is applied to the electrodes.

In a three-electrode amperometric system, such as used in the CLT10 sc and CLF10 sc analyzers, the anode is substantially split into two parts; reference and auxiliary (or counter) electrode. These systems are always supported by a dedicated electrical circuit that supplies voltage between all electrodes. The three-electrode design usually makes measurements more stable and extends the life of the working and reference electrodes.

Specifications

CL10 sc series chlorine sensor

• Measuring range 0 to 20 ppm
• Lower Detection Limit 30 ppb (0.03 ppm)
• Limit of quantitation 90 ppb (0.09 ppm)
• Resolution 0.001 ppm (1 ppb)
• Accuracy: Free Chlorine: ± 3% of reference at constant pH less than 7.2 (± 0.2); Free chlorine: ± 10% of reference with a stable pH of less than 8.5 (± 0.5); Total chlorine: ± 10% of reference with a stable pH of less than 8.5 (± 0.5); Total chlorine: ± 20% of reference with a stable pH above 8.5.
• Reproducibility 30 ppb (0.03 ppm) or 3%, whichever is greater
• Response time: at stable temperature and pH - total chlorine:
• Sampling time: continuous
• Interference: free chlorine: monochloramine, chlorine dioxide, ozone, and chalk deposits; total chlorine: chlorine dioxide, ozone and chalk deposits.
• Pressure limit: 0.5 bar, no pressure surges and / or vibrations
• Sample flow rate: from 30 to 50 l / h, optimal - 40 l / h.
• Sample pH range 4 to 9 pH
• Sample temperature (with vibration compensation) 5 to 45 ° C
• Temperature compensation: internal temperature compensation in the sensor
• Storage temperature: 0 to 50 ° C dry, no electrolyte; 15 to 25 ° C with electrolyte
• Dimensions: 25mm x 482.6mm
• Measurement method: reagent-free electrochemical three-electrode amperometric system
• Calibration methods: one or two point calibration (zero and slope)
• Material: corrosion resistant, fully submersible (stainless steel, PVC, silicone rubber and polycarbonate)

Panel

• Working temperature 0 - 50 ° С
• Power supply 12 V, 30 mA maximum (powered by sc controller)
• Dimensions 495.3 x 482.6 x 151.2 mm
• Weight approx.5.5 kg (panel and panel components only)
• The controller connects to the universal industrial controller SC 200 (2-channel) and SC 1000 (multi-channel) series
• Waterproof rating IP65 (NEMA 4X)