Chlorides

Cl-

Applications

  • Boiler feed
  • Cooling water
  • Drinking water
  • Industrial waste water
  • Surface water
Chlorides

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)

The determination ranges of the chloride analyzer vary from 0.2 to 5000 mg/L Cl- using the (optional) internal dilution module. Single reagent configuration for easy operation and low running costs.

Method

The colorimeter uses an adaptation of the mercury thiocyanate method to measure chloride. Chloride reacts with mercury thiocyanate and iron based reagents to produce an orange-brown ferric thiocyanate complex. The absorbance intensity is proportional to the chloride concentration in the sample and is measured at 470 nm.

Features

Measured parameter Cl-

Range

(Ø 26 mm) 0.2 - 50 ppm
(Ø 16 mm) 0.5 - 100 ppm
(with dilution) 20 - 5000 ppm

Reproducibility*

* if two values take whichever is greater.
(Ø 26 mm) ± 0.3 ppm / ± 5% (0-20 ppm), ± 0.5 ppm / ± 5% (20-50 ppm)
(Ø 16 mm) ± 1 ppm / ± 5%
Limit of detection 0.2 ppm
Wavelength 470 nm
Demineralized water Not required
Number of reagents 1
Min. analysis time 7 minutes
Default analysis time 20 minutes

Reagent consumption**

** per month, at the default analysis frequency.
(Ø 26 mm) 4 L
(Ø 16 mm) 2 L

Reagents and standards

The colorimeter uses an adaptation of the mercury thiocyanate method to measure chloride. Chloride reacts with mercury thiocyanate and iron based reagents to produce an orange-brown ferric thiocyanate complex. The absorbance intensity is proportional to the chloride concentration in the sample and is measured at 470 nm. This method is optimezed for low range chlorides analysis, 0 - 500 ppb.

Features

Measured parameter Cl-

Range

(Ø 26 mm) 500 ppb
Wavelength 470 nm
Demineralized water Not required
Number of reagents 1

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
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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