COLO.Science · Technical Specification
COD100
Laboratory COD Analyzer · Closed Tube Digestion · ISO 15705:2002 · EPA 410.4
The COLO COD100 laboratory COD analyzer is a compact and reliable system for precise determination of Chemical Oxygen Demand (COD) in water samples. The instrument follows a standardized closed tube dichromate digestion method with spectrophotometric detection, making it suitable for environmental laboratories, water treatment plants, and industrial wastewater monitoring.
COD Analyzer
ISO 15705:2002
EPA 410.4
420 / 620 nm
USB Export
200 Data Sets
COD100R Reactor
COD100 · Laboratory COD Analyzer
COD100R · Digestion Reactor Accessory
Instrument
COD100 · COLO.Science
Address (HQ)
Polje ob Sotli 4
SI-3255, Slovenia
SI-3255, Slovenia
Contact
sales@colo.si
+386 70 713 437
+386 70 713 437
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COD100 · Technical Specification
Document ID: COL-TEC-COD100-EN
Version: Print Edition · V9
Informational technical sheet · Non-binding · Controlled electronic document
Version: Print Edition · V9
Informational technical sheet · Non-binding · Controlled electronic document
COD100 · laboratory COD analyzertechnical specification sheet
Closed Tube Digestion
Potassium Dichromate Method
420 / 620 nm
±8% Accuracy
≤3% Repeatability
— Standardized COD determination for water and wastewater laboratories
📋 General & analytical specifications
| Instrument identity | |
|---|---|
| Model | COD100 |
| Instrument type | Laboratory COD analyzer |
| Measurement parameter | Chemical Oxygen Demand (COD) |
| Intended sample types | Water samples, wastewater, surface water, and industrial effluent |
| Compliance | Designed in line with ISO 15705:2002 and EPA 410.4 |
| Measurement ranges & optical detection | |
| Low-range COD | 0–150 mg/L |
| High-range COD | 150–1500 mg/L |
| Detection wavelength (low range) | 420 nm |
| Detection wavelength (high range) | 620 nm |
| Detection principle | Spectrophotometric measurement of generated Cr³⁺ after digestion |
| Performance parameters | |
| Accuracy | ±8% |
| Repeatability | ≤3% |
| Calibration concept | Two-point calibration using standard solutions |
| Memory capacity | Up to 200 sets of data |
| Data export | USB interface |
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⚗️ Method principle, usability & reactor configuration
Measurement principle
Analytical method: Closed tube digestion using potassium dichromate (K₂Cr₂O₇) as a strong oxidant.
Reaction medium: Strongly acidic environment with sulfuric acid and silver sulfate catalyst.
Reaction temperature: Up to 165 °C during digestion.
Oxidation pathway: Organic compounds are oxidized to CO₂ and H₂O, while Cr(VI) is reduced to Cr(III).
Result generation: The measured absorbance is proportional to the COD value of the sample.
Laboratory workflow highlights
Standardized workflow: Recognized digestion-based COD procedure suitable for regulated laboratory practice.
Result consistency: High repeatability supports reproducible daily testing routines.
Range flexibility: Dual-wavelength approach supports both lower and higher COD concentration ranges.
Laboratory suitability: Compact design supports routine use in environmental and utility laboratories.
Data handling & usability
Data storage: Stores up to 200 sets of measurement data for laboratory traceability.
Data transfer: USB output supports convenient export and reporting workflows.
Interface concept: User-friendly operation for modern laboratory environments.
Repeatable monitoring: Suitable for standardized monitoring of wastewater, surface water, and industrial samples.
Optional accessory · COD100R reactor
| Accessory model | COD100R Reactor |
| Sample capacity | Supports digestion of up to 21 samples simultaneously |
| Temperature range | Adjustable from 100–165 °C |
| Digestion time | Configurable from 0–120 minutes |
| System role | Dedicated digestion support for efficient batch preparation prior to COD measurement |
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🖼️ Product visuals & applications
Applications & laboratory use
| Application field | Application description |
|---|---|
| Environmental laboratories | COD100 supports routine COD determination in laboratories focused on environmental water quality control, regulatory sample evaluation, and laboratory-based compliance workflows. |
| Water treatment facilities | Suitable for process monitoring and verification tasks in water and wastewater treatment environments where repeatable digestion-based COD analysis is required. |
| Industrial wastewater monitoring | Useful for laboratories and industrial facilities that need standardized COD testing of effluent streams and process-related water samples. |
| Surface water testing | Applicable to routine assessment of contamination load and oxygen demand indicators in surface water samples. |
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📌 Operational highlights & practical notes
| Operational highlights | |
|---|---|
| Method reliability | Digestion plus spectrophotometric detection provides a classical and standardized COD workflow. |
| Range flexibility | Dual wavelength approach supports both lower and higher COD concentration ranges. |
| Laboratory efficiency | The optional COD100R reactor improves batch handling and digestion efficiency. |
| Practical notes | |
|---|---|
| Configuration note | Final package may include analyzer only or analyzer plus COD100R digestion reactor, depending on workflow needs. |
| Application note | Method suitability should be confirmed against the laboratory’s internal SOP, standards, and target concentration range. |
| Document note | This sheet summarizes the visible technical and application information supplied for the COD100 system. |
InstrumentCOD100 laboratory COD analyzer
AccessoryCOD100R digestion reactor
MethodClosed tube dichromate digestion
OutputUSB data export
Headquarters address
Polje ob Sotli 4
SI-3255, Slovenia
Application guidance: tell us your sample type, expected COD range, throughput needs, and whether you need the digestion reactor included. We will propose the matching COD100 configuration for your laboratory workflow.
Quick contact
COLO.Science · Next Step
Explore the product, continue with COLO.Science, or request a quotation
Use this technical specification as a reference document, then continue to the COLO website, request a quotation for the COD100 configuration, or explore application guidance and laboratory knowledge resources.
Manufacturer & configuration notice (important):
Specifications in this document are provided for general reference and may represent a typical configuration. COLO reserves the right to change technical specifications without notice.
For procurement and tender purposes, the only valid and binding specification is the official COLO quotation and the accompanying technical specification that is engineering-approved.
Specifications in this document are provided for general reference and may represent a typical configuration. COLO reserves the right to change technical specifications without notice.
For procurement and tender purposes, the only valid and binding specification is the official COLO quotation and the accompanying technical specification that is engineering-approved.
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