Determination of the chemical oxygen demand index (ST-COD)
Waterproof*) ST-COD sealed tubes ready for use
Scroll Memory Suppression of chloride interference
Automatic Switch-Off up to 1000 mg/l (LR & MR)
Real-Time-Clock and Date up to 10000 mg/l (HR)3 ranges:
Calibration Mode Low range: 0 – 150 mg/l,
Backlit Display Middle range: 0 – 1500 mg/l,
Storage Function High range: 0 – 15000 mg/l
Suitable for use as a reference instrument
*) as defined in IP 68, 1 hour at 0.1 meter, buoyant
Waste water parameter COD
The chemical oxygen demand, ST-COD value
(ST = small scale sealed tube), 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.

MD 200 COD VARIO Photometer
With a measuring range from 0 to 15,000 mg/l O2, the Lovibond® COD VARIO photometer are suitable for waste water testing.

Two LEDs light sources with long-term stability
(λ1 = 430 nm; λ2 = 610 nm, according to ISO 15705:2002), a waterproof sample chamber, a large digital display, and the user-friendly keypad ensure maximum operating reliability and convenience.

The Lovibond® COD VARIO set-up 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 Lovibond® COD VARIO tube test (LR, MR according to ISO 15705:2002), it is heated in the reactor and then analysed in the photometer.

0 –150 mg/l O2 ±3,5%*) FS
0 –1500 mg/l O2 ±3,5%*) FS
0 –15000 mg/l O2 ±3,5%*) FS

*tolerance based on the use of potassium-hydrogenephthalate standards (DIN 38409)

Scroll Memory (SM)
To avoid unnecessary scrolling for the required test method, the instrument memorizes the last method used before switching off the instrument. When the instrument is switched on again, the scroll list comes up with the last used test method first.
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