COD Analyser with 21-Position Digestor
Chemical oxygen demand analyser supplied with a 21-place digestor block, reading COD colorimetrically over two ranges after a two-hour dichromate digestion.
Typical applications
- Water and waste water analysis
- Effluent treatment plant monitoring
- Coking, papermaking and petrochemical process water
- Textile printing, leather and food processing effluent
- Pharmaceutical effluent monitoring
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Add as many products as you need and send one enquiry covering all of them, or send this item on its own. Bulk and drum quantities are quoted on request.
Worth knowing before you order
COD and BOD are not two ways of measuring the same thing. This instrument measures chemical oxygen demand - everything a hot acid dichromate oxidant will attack, digested at 150 °C for 120 minutes and then read as colour - so it gives an answer the same working day and it counts organics that micro-organisms will not touch. A BOD analyser answers a biological question over five days. Buy on the running cost as much as the instrument: 25 vials of each range are supplied, and after that every single test consumes a sealed dichromate vial that must be bought in and, because it contains chromium and mercury salts, disposed of as hazardous waste. The digestor is included here, which is not always so when COD analysers are quoted - and without it the analyser measures nothing. Two ranges are covered by two LEDs, so check the expected effluent strength falls inside 15-1500 mg/L before ordering.Specification
| Measuring ranges | (15~150) mg/L, (150~1500) mg/L |
|---|---|
| Light source | Two LED light sources, one for each COD testing range |
| Accuracy | ±5% |
| Repeatability | ±3% |
| Fluctuation | ± 6 mg/L (20 min) |
| Calibration | 2 points |
| Display | LCD |
| Data | Stores 200 sets of measuring data, following GLP norm |
| Interface | USB, data transferable to a computer |
| Analyser power supply | Adaptor, using AC 220V, 50/60Hz |
| Digestor capacity | 21 samples at a time |
| Digestor temperature range | 0-165°C |
| Digestor temperature control accuracy | ±2°C |
| Digestor temperature field homogeneity | <3°C |
| Digestor timer range | 0-120 minutes |
| Digestor timer control accuracy | ±2%, time repetitive ≤±1% |
| Digestor setting for COD | Temperature set at 150°C, time set at 120 minutes |
| Digestor operator protection | Transparent plastic protection shield |
| Supplied vials and cuvettes | COD vials 0-150 mg/L - 25 nos., COD vials 0-1500 mg/L - 25 nos., glass cuvettes - 4 nos., test-tube rack |
Support available
- Installation & commissioning
- Calibration
- Operator training
- Annual maintenance contract
- Spares & consumables
Calibration is arranged through NABL-accredited laboratories under the relevant scope. We state the scope and the certificate number on the quotation — see what accreditation actually covers.
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Specification for Total Organic Carbon Analyser, UV Oxidation with NDIR Detection
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- Waste water and effluent monitoring
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