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TEM Online COD Analyzer
The potassium dichromate spectrophotometric method is a chemical oxygen demand (COD) determination technique based on redox reactions. In this method, potassium dichromate is employed as a strong oxidizing agent to oxidize the reducing substances in the water sample under acidic conditions. The COD value is calculated by measuring the absorbance of the reaction products using spectrophotometry. The major interfering substances during the measurement are chloride ions or chlorides, which can be effectively eliminated by adding mercuric sulfate to the water sample.
Product Application
● Monitoring at the inlet and outlet of wastewater treatment plants
● Effluent discharge outlets of industrial facilities and pollution sources
Key words:
Classification:
- 产品描述
- Product Features
- Performance Index
- Field Application
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- Employs the dichromate method in full compliance with GB 11914-89, offering high accuracy, excellent stability, and strong correlation with manual laboratory analysis.
- Innovative structural design ensures lower failure rate, reduced maintenance, lower reagent consumption, and enhanced cost performance.
- Unique valve assembly enables flexible switching among multiple channels, providing easy maintenance and extended service life.
- High-precision optical system ensures accurate reagent dosing, eliminating volumetric errors caused by wear of peristaltic pumps and tubing, while achieving precise micro-reagent metering.
- Multiple signal output interfaces available to meet diverse integration requirements.
- Equipped with robust quality control functions including automatic calibration and standard solution verification, fully compliant with the latest industry standards.
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Parameters
Details
Measuring Range
0–200 mg/L; 0–600 mg/L; 0–1000 mg/L; 0–2000 mg/L, extendable
Repeatability
≤ 5%
Indication Error
±10% (COD < 40 mg/L)
±8% (40 mg/L ≤ COD < 100 mg/L)
±5% (100 mg/L ≤ COD < 160 mg/L)
±3% (COD ≥ 200 mg/L)Actual Sample Accuracy
≤ 5 mg/L (COD < 50 mg/L)
≤ 10% (COD ≥ 50 mg/L)Quantification Limit
≤ 15 mg/L
24h Low Concentration Drift
±5 mg/L
24h High Concentration Drift
≤ 5%
Measurement Cycle
Minimum cycle ≤ 30 min
Calibration
Supports online automatic calibration
Standard Solution Verification
Supports automatic verification with standard solutions
Automatic Cleaning
Automatic pipeline cleaning after each measurement
Reagent Consumption
0.65–2.6 mL/time/reagent
Output Interfaces
4–20 mA, RS485 with Modbus protocol
Power Supply
220 ± 22 VAC, 50 ± 2.5 Hz
Power Consumption
Average 50 W; peak < 300 W
Dimensions
420 × 600 × 250 mm
Ambient Temperature
5–40°C
Related Information
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Tengine Innovation (Beijing) Instruments Inc.
Email: contact@tengine.com.cn
WhatsApp: +86 133 3109 8301
Address: Floor 6, Building 8, Yard 1,
Nongda South Road, Haidian District, Beijing
Copyright©2022 Tengine Innovation (Beijing) Instruments Inc.
Copyright©2022 Tengine Innovation
(Beijing) Instruments Inc.