FSEHCL-100 Intelligent COD Digestion Apparatus

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FSEHCL-100 Intelligent COD Digestion Apparatus

Product ID：HSYJcodx049

Price: Please inquire PDF Format

Supply Ability:50 SETS/MON

Port:SHENZHEN

Product Introduction
Other information

Model NumberFSEHCL-100

Brand NameSDYIYUAN

Payment TermsTT，PAYPAL，Alibaba.com Pay

FSEHCL-100 Intelligent COD Digestion Apparatus
The FSEHCL-100 Intelligent COD Digestion Apparatus is a high-end laboratory instrument designed for Chemical Oxygen Demand (COD) determination in high-chloride water samples (1000–50,000 mg/L), including surface water, domestic sewage, and industrial wastewater.
It is fully compliant with HJ 70-2025 (chlorine correction method) and DB37/T 3737-2019 (dichromate method for high-chloride water COD), ensuring accurate, standardized, and repeatable COD measurement results.

Product Introduction
The FSEHCL-100 COD digestion system integrates advanced reflux digestion, intelligent nitrogen control, and dual absorption correction technology. It is specifically designed to eliminate chloride interference in COD testing, ensuring true COD values in complex wastewater matrices.
By combining automatic digestion, precise nitrogen purging, and chlorine correction, the system delivers high accuracy and improved analytical reliability for environmental monitoring and industrial wastewater control.

Performance Features
•Supports COD testing for high chloride water (1000–50,000 mg/L)
•Fully compliant with HJ 70-2025 and DB37/T 3737-2019 standards
•Intelligent touchscreen operation with retractable control system
•Far-infrared ceramic heating with microcrystalline corrosion-resistant surface
•Built-in cooling water circulation + compressor refrigeration system
•Anti-condensation patented cooling technology
•6-position independent sample processing system
•High-precision nitrogen flow control (single-hole independent control)
•Automatic nitrogen switching between digestion and standby modes
•Dual absorption system for complete chlorine gas capture
•PTFE sealed digestion system for high chemical resistance
•Fully automated endpoint control, no manual intervention required
•Fast heating (5–10 min adjustable) with stable digestion performance

Working Principle
The FSEHCL-100 operates based on the dichromate reflux digestion method with chlorine correction.
•The sample is mixed with a known amount of potassium dichromate and mercury sulfate under strong acidic conditions.
•Silver sulfate acts as a catalyst during boiling reflux digestion.
•Organic substances are oxidized, while chloride ions are converted into chlorine gas.
•The remaining dichromate is titrated using ferrous ammonium sulfate with ferroin indicator to determine apparent COD.
•Chlorine gas is absorbed in sodium hydroxide solution and quantified using sodium thiosulfate titration.
•Final COD value = Apparent COD − Chlorine correction value.
This ensures accurate COD determination even in high-chloride wastewater environments.

Technical Parameters

Parameter	Specification
Application Range	1000–50,000 mg/L chloride water
Standard Compliance	HJ 70-2025 / DB37/T 3737-2019
Sample Positions	6
Heating Method	Far-infrared ceramic + microcrystalline corrosion-resistant plate
Operation Mode	LCD touchscreen, retractable automatic control system
Cooling System	Built-in water circulation + compressor refrigeration
Anti-condensation	Patented anti-fog cooling technology
Nitrogen Flow Control	0–300 mL/min
Flow Accuracy	±1 mL/min
Repeatability	±0.5% F.S
End Point Control	Independent single-hole nitrogen flow control system
Digestion Time Control	0–999 min, independent control per channel
Heating Power	≤3000 W (adjustable per channel)
Heating Time	5–10 min adjustable
Nitrogen Modes	Digestion: 5–10 mL/min / Standby: 30–40 mL/min
Absorption System	Dual absorption system (patented)
Digestion Vessel	PTFE threaded sealed conical flask (patented)
Power Supply	AC 220V / 50Hz
Dimensions	900 × 450 × 600 mm

Application Fields
•Municipal wastewater treatment plants
•Industrial effluent monitoring
•Petrochemical wastewater analysis
•Environmental monitoring stations
•High-salinity seawater testing
•Chemical and pharmaceutical industries
•Research and university laboratories
•Regulatory compliance testing agencies

Product Comparison

Feature	FSEHCL-100 Intelligent COD Digester	Traditional COD Digestion System
Chloride Interference Handling	Built-in chlorine correction system	No correction capability
Temperature Control	Far-infrared + microcrystalline heating	Conventional heating block
Nitrogen Control	High-precision automatic control	Manual or none
Sample Capacity	6-channel independent control	Limited or batch-dependent
Cooling System	Compressor + circulation + anti-condensation	Air cooling or none
Accuracy	High (standard-compliant)	Affected by chloride interference
Automation Level	Fully intelligent	Semi-manual operation

FAQ
Q1: What is the main advantage of FSEHCL-100?
It provides accurate COD measurement in high-chloride water using a chlorine correction system.
Q2: Which standards does it comply with?
It fully complies with HJ 70-2025 and DB37/T 3737-2019.
Q3: Can it handle industrial wastewater with high salinity?
Yes, it is specifically designed for 1000–50,000 mg/L chloride environments.
Q4: Is nitrogen control automatic?
Yes, it features high-precision single-hole independent nitrogen flow control.
Q5: How many samples can be processed at once?
It supports 6 independent digestion channels.

Summary
The FSEHCL-100 Intelligent COD Digestion Apparatus is a professional-grade solution for high-chloride COD analysis in complex wastewater environments. With advanced chlorine correction technology, intelligent nitrogen control, and fully automated operation, it ensures high accuracy, strong anti-interference capability, and full compliance with international testing standards, making it ideal for modern environmental and industrial laboratories.

FAQ
Q1: What is the main advantage of FSEHCL-100?
It provides accurate COD measurement in high-chloride water using a chlorine correction system.
Q2: Which standards does it comply with?
It fully complies with HJ 70-2025 and DB37/T 3737-2019.
Q3: Can it handle industrial wastewater with high salinity?
Yes, it is specifically designed for 1000–50,000 mg/L chloride environments.
Q4: Is nitrogen control automatic?
Yes, it features high-precision single-hole independent nitrogen flow control.
Q5: How many samples can be processed at once?
It supports 6 independent digestion channels.