Chlorine

Cl2

Applications

  • Drinking water
  • Municipal wastewater
  • Industrial wastewater discharge limit monitoring or process optimization
  • Food and beverage
  • Power and semiconductors
  • Reverse osmosis (RO) process
Chlorine

Description

The 3S colorimeter is a compact analytical instrumentation for online analysis and process monitoring. The colorimeter is based on a color-developing chemical reaction carried out inside the analyzer's glass cell. The sample, coming from an external reservoir or process stream is autonomously grabbed by the instrument and mixed with the appropriate reagents to make the reaction happen. The analyzer uses an LED light source and a photodiode to photometrically measure the developed color intensity (absorbance). The absorbance is proportional to the concentration of the target chemical species (analite).

Features:

  • Low reagents consumption and analytical reliability thanks to our custom designed miniature peristaltic pumps
  • Dual compartment design to guarantee a complete separation between the electronics and the hydraulic section
  • Color touchscreen to show the last measured value clearly, and to set all the options and settings via an user friendly interface
  • Datalogger function with data history in graphical form and USB download
  • Automatic calibration, validation and cleaning to reduce down time and operator intervention, their frequency can be freely set by the user
  • Fully integrable in industrial automation via the analog outputs (2 x 4-20 mA channels), digital output (2 relays + ModbusRTU) and digital input (voltage free contact)

Chlorine is measured using the DPD colorimetric method (US EPA 4500-CI G and ISO 7393-2 accepted method). The determination ranges of the analyzer vary from trace μg/L to 200 mg/L Cl2 using the (optional) internal dilution module.

Method

Chlorine-containing samples are reacted with N,N-diethyl-p-phenylenediamine sulfate in the presence of a suitable buffer. The indicator and buffer are added and react with chlorine to produce a pink color. This compound is measured at 525 nanometers.

Features

Measured parameter Cl2

Range

(Ø 26 mm) 2000 ppb
(Ø 16 mm) 5000 ppb
(with dilution) 200 ppm

Reproducibility*

* if two values take whichever is greater.
(Ø 26 mm) ± 0.01 ppm / ± 3% (0-1 ppm), ± 0.02 ppb / ± 3% (1-2ppm)
(Ø 16 mm) ± 0.05 ppm / ± 3%
Limit of detection 0.01 ppm
Wavelength 525 nm
Demineralized water Not required
Interferences Peroxides, bromine, iodine, ozone.
Reference ISO 7393-2:2018
Number of reagents 2
Min. analysis time 6 minutes
Default analysis time 15 minutes

Reagent consumption**

** per month, at the default analysis frequency.
(Ø 26 mm) 2 L
(Ø 16 mm) 1 L

Reagents and standards

Safety Datasheet

Chlorine-containing samples are reacted with N, N-diethyl-p-phenylenediamine sulfate in the presence of a suitable buffer. The indicator and buffer are added and react with chlorine to produce a pink color. This compound is measured at 525 nanometers. In total chlorine and monochloramine measurements, potassium iodide is added.

Features

Measured parameter Cl2

Range

(Ø 26 mm) 0.01 - 1 ppm
(Ø 16 mm) 0.02 - 2 ppm
(with dilution) 0.8 - 200 ppm

Reproducibility*

* if two values take whichever is greater.
(Ø 26 mm) ± 0.01 ppm / ± 3% (0-1 ppm), ± 0.02 ppb / ± 3% (1-2ppm)
(Ø 16 mm) ± 0.05 ppm / ± 3%
Limit of detection 0.01 ppm
Wavelength 525 nm
Demineralized water Not required
Interferences Peroxides, bromine, iodine, ozone.
Reference ISO 7393-2:2018
Number of reagents 2
Min. analysis time 6 minutes
Default analysis time 15 minutes

Reagent consumption**

** per month, at the default analysis frequency.
(Ø 26 mm) 2 L
(Ø 16 mm) 1 L

Reagents and standards

Safety Datasheet

Chlorine-containing samples are reacted with N, N-diethyl-p-phenylenediamine sulfate in the presence of a suitable buffer. The indicator and buffer are added and react with chlorine to produce a pink color. This compound is measured at 525 nanometers. In total chlorine measurements, potassium iodide is added.

Features

Measured parameter Cl2

Range

(Ø 26 mm) 0.01 - 1 ppm
(Ø 16 mm) 0.02 - 2 ppm
(with dilution) 0.8 - 200 ppm

Reproducibility*

* if two values take whichever is greater.
(Ø 26 mm) ± 0.01 ppm / ± 3% (0-1 ppm), ± 0.02 ppb / ± 3% (1-2ppm)
(Ø 16 mm) ± 0.05 ppm / ± 3%
Limit of detection 0.01 ppm
Wavelength 525 nm
Demineralized water Not required
Interferences Peroxides, bromine, iodine, ozone.
Reference ISO 7393-2:2018
Number of reagents 3
Min. analysis time 6 minutes
Default analysis time 15 minutes

Reagent consumption**

** per month, at the default analysis frequency.
(Ø 26 mm) 2 L
(Ø 16 mm) 1 L

Reagents and standards

Safety Datasheet

Technical Specifications

Model 3S-CL
Sampling Mode Batch, with freely settable frequency.
Sample Pressure: Atmospheric
Temperature: 5 ‐ 45°C (41 ‐ 113°F)
Flow Rate: 80 to 500 mL/min
Connection: 6 mm (¼-in.)
Drain Pressure-free drain
Connection: 12 mm (½-in.)
Input Streams 2
Material Epoxy-coated stainless steel AISI 304
Dimensions (H x W x D) 604 x 380 x 210 mm (23.6 x 14.8 x 8.2 in)
Weight 20 kg (44 lbs)
Power Supply Input Voltage: 115 VAC,230 VAC
Power consumption: max. 80 W
Output signals 2 x 4-20 mA analog outputs
Modbus via RS485,Ethernet
Alarms 2 SPDT programmable voltage-free relays
Digital Input None, Online, Start Extra, Skip Idle, Emergency Stop
Ambient Temperature 5 - 45 °C (41 - 113 °F)
Ambient Humidity 10 - 90 % RH (non-condensing)
Protection Grade IP54 (indoor only, outdoor use possible with external cabinet, not included)

Documentation

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