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

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
Reference UNI 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

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 - 2 ppm
(Ø 16 mm) 0.02 - 5 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
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

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 16 mm) 5 ppm
Wavelength 525 nm
Demineralized water Not required
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

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,24 VDC
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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