COD-Setup,CheckitDirect,COD Vario,Waste,Water,Testing,Equipment

COD-Setup CheckitDirect COD Vario Waste Water Testing Equipment

COD-Setup,CheckitDirect,COD Vario,Waste,Water,Testing,EquipmentWaste water testing equipment for user-friendly, precise measurement of chemical oxygen demand.


  • ST-COD sealed tubes ready for use

  • Suppression of chloride interference up to 1000 mg/l

  • 3 measuring ranges:
    Low range: 0 - 150 mg/l, according to
    ISO 15705:2003-01
    Middle range: 0 - 1500 mg/l, according to
    ISO 15705:2003-01
    High range: 0 - 15000 mg/l

The Waste Water Parameter COD

The chemical oxygen demand, ST-COD value, of water as determined by this dichromate method can be considered as an estimate of the theoretical oxygen demand, i.e. the amount of oxygen consumed in total chemical oxidation of the organic constituents present in the water.

The AQUALYTIC® CheckitDirect COD vario

The AQUALYTIC® CheckitDirect COD vario test setup allows highly sensitive and precise water testing with minimum effort. It measures the ST-COD concentration by photometric detection employing a linear relationship between absorbance and concentration.

After adding the sample to a AQUALYTIC® COD vario tube test (LR, MR according to ISO 15705:2003-01), it is heated in the reactor and then analysed in the CheckitDirect COD vario photometer.

The COD-Setup comprises the CheckitDirect COD vario photometer, 25 tube tests for each of the two lower measuring ranges, a reactor for sample digestion, and a vial stand.

CheckitDirect COD Vario Photometer

With a measuring range from 0 to 15,000 mg/l O2, the AQUALYTIC® CheckitDirect COD vario photometer is suitable for waste water testing.

Two LEDs light sources with long-term stability (?1 = 605 nm; ?2 = 430 nm, according to ISO 15705:2003-01), a waterproof sample chamber, a large digital display, and the user-friendly keypad ensure maximum operating reliability and convenience.

COD Vario Tube Tests

The AQUALYTIC® COD vario tube tests are available for the measuring ranges 0-150 mg/l O2, 0-1500 mg/l O2 and 0-15000 mg/l O2. Their chemical properties and a 16 mm tube diameter is suitable also for use with Hach photometers.