Hangzhou Zetian Technology Co., Ltd.

Model MDet-5000 Cr/Total Cr - Integration Heavy Metal Water Quality Online Analyzer



In measurement of hexavalent chromium, in acid medium, hexavalent chromium of sample react withdiphenylcarbazide whichgenerate purple compound.Compound color depth is proportional to the content of hexavalent chromium in the samples.When measuring total chromium, first mix sample with potassium permanganate, dispel under the situation of airtight high temperature and high pressure, then trivalent chromiumof the sample is oxidized to hexavalent chromium.Spectrophotometric method is used to measure the absorbance value of reaction product (hexavalent chromium),and obtain the content of the hexavalent chromium and total chromium in the samples.

  • Full spectrum (200-800nm) measurement techniques, can simultaneously measure ammonia nitrogen and COD(UV method)
  • Photoelectric measurement method,sample accurately,low injection error
  • Unique hybrid technology of bubble agitation ensures thorough mixing of samples and reagents
  • With automatic leakage alarm and self-diagnostic function, safety in use, efficient analysis

  • Method: diphenylcarbazidespectrophotometry (Cr6+),potassiumpermanganate oxidation-diphenylcarbazide  spectrophotometry method(TCr)
  • Uncertainty: ±3%
  • Range: 0~1/2/5mg/L (total chromium, hexavalent chromium),0~0.5mg/L(hexavalent chromium)
  • Interval: continuous, 1, 2, 3...24 hours a day, or triggered via a serial port
  • Reproducibility: ±3%
  • Reagent Consumption: A single set of reagents can measure 250 samples
  • Analog Output: 4-20mA output (expandable to 2-channel), the maximum load 500Ω
  • Analog Input: 4-20mA input (expandable to 2-channel), compatible with 0-5V input
  • Relay Output: 4 ,can be flex-ibly configured
  • Communication Interface: RS485 / RS232 / USB interface (Optional)
  • Maintenance: <1 hour/ month
  • Working Temperature: 5℃~40℃
  • Power: 200W(220VAC, 50Hz), without considering pumps

Apply to hexavalent chromium (chromium) monitoringof industrial sewage treatment plant and industrial process (such as electroplating, metallurgy, printing and dyeing industry) ,etc.

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