Continuous Dissolved Chrome (Cr) Analyzer
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Continuous Dissolved Chrome (Cr) Analyzer | SEIBOLD

Chromium (Cr) is found naturally in the Earth’s crust and is commonly consumed through food. In industries, it is used as an additive in alloys and materials for its strength, hardness, and resistance to various factors. For drinking water, a maximum concentration of 0.05 mg/L is recommended. While Chromium III is essential for health, hexavalent chromium is more toxic.


Chromium (Cr) can come from the following sources:

  • Natural sources: Chromium (Cr) is widely present in the Earth’s crust, generally existing in the form of Chromium +2 or +6. Food is typically the main source of consumption.
  • Industries: Chromium (Cr) is rarely found alone. As an additive, it is added as an alloy or material with the following properties: strength, hardness, permanence, hygiene, color, and resistance to temperature, wear, and corrosion.
  • Drinking water: A maximum concentration of about 0.05 mg/L is recommended.

Chromium III is an essential nutrient for most animals and humans, although hexavalent chromium appears to be more toxic than trivalent chromium.

Measurement method: It is based on measuring metal ions in wastewater and their reaction to reactive dyes with spectrometric measurement. The changes in the intensity of visible light through a cuvette containing samples formed of complex metals are measured to obtain a proportional concentration of metals.

Technical characteristics:

  • Measurement range: 0.005 - 1.000 mg/L in standard version (other measurement ranges can be offered on request)
  • Accuracy: +/- 3% on the full scale
  • Resolution: 0.005 mg/L
  • Automatic calibration and cleaning
  • Spectrometric method with LED detector
  • Equipped with a color LCD screen
  • Measurement interval: continuous, discontinuous (programmable, remote triggering)
  • Measurable sample volume: 75 - 200 mL
  • Volume of reagent and Sigma Aldrich buffer: 3 mL
  • Maintenance interval: 3 months
  • Working temperature range: 5 - 40°C
  • Working humidity range: 0 - 85% RH
  • Output: 4 - 20 mA
  • Powered by 220 V
  • External dimensions: 70 x 50 x 35 cm and weight: 35 kg
  • Housing made either of stainless steel (for drinking water applications) or plastic (for other industrial applications)


  • Robust design
  • Minimal maintenance
  • Easy handling
  • High precision
  • Suitable for critical applications
  • Automatic cleaning and calibration

Typical applications:

Measurement in drinking water, river monitoring, semiconductor industry, and electroplating