COD (Chemical Oxygen Demand) Sensor, 0~500 mg/L, 0~200 NTU

$1,507.93

The COD sensor uses a dual-wavelength ultraviolet absorption method with a range of 0~500 mg/L (COD) and 0~200 NTU (turbidity) and a resolution of 0.1. It offers high accuracy ±5%, a fast response time (<10s). The water quality sensor has two-point calibration, automatic cleaning with a scraper. With RS485 outputs, built with 316L stainless steel, suitable for wastewater treatment, drinking water testing, industrial water treatment, environmental monitoring, etc.

Measuring Range *

SKU: ATO-WQS-COD

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Delivery date: 6-12 days

Overview

The COD sensor measures 0~500 mg/L (COD) and 0~200 NTU (turbidity) with high accuracy, fast response, and 0.1 resolution. It features automatic cleaning, RS485 outputs, and a durable 316L stainless steel design, ideal for water treatment and monitoring.

Specification

Model	ATO-COD-308
Measurement Principle	Dual-wavelength ultraviolet absorption method
Measurement Range	COD: 0~200 mg/L equiv. KHP, Turbidity: 0~100 NTU
Measurement Range	COD: 0~500 mg/L equiv. KHP, Turbidity: 0~200 NTU
COD Accuracy	±5%
Response Time (T90)	<10s
Minimum Detection Limit	0.2 mg/L (0~200 mg/L), 0.4 mg/L (0~500 mg/L)
COD Resolution	0.1 mg/L
Turbidity Accuracy	±5%
Turbidity Resolution	0.1 NTU
Calibration Method	Two-point calibration
Output Mode	RS485 (Modbus/RTU)
Power Supply	12~24 VDC
Power Consumption	0.4 W @12V (operation), 2 W @12V (cleaning)
Storage Temperature	-5~65°C
Operating Conditions	0~50°C, <0.2 MPa
Protection Level	IP68
Installation Method	Submersion installation
Cable Length	5 meters (customizable length available)
Material	316L Stainless Steel

Feature

Chemical-Free and Eco-Friendly: Operates without reagents, ensuring no pollution and lower environmental impact.
Compact and Easy Installation: Small size for convenient setup and continuous online water quality monitoring.
Multi-Parameter Measurement: Capable of measuring COD, turbidity.
Automatic Interference Compensation: Adjusts for velocity-related interference for more accurate readings.
Self-Cleaning System: Equipped with a cleaning brush to prevent biofouling and ensure consistent performance.
Fast Response and High Precision: Delivers quick and accurate measurements, even in dynamic water conditions.
Long-Term Stability: Maintains excellent reliability and stability over extended periods of monitoring.
Low Maintenance Requirements: Features long usage cycles and low operating costs, minimizing maintenance needs.
Versatile Output Support: Supports RS485 with Modbus RTU protocol output for system integration.
Energy-Efficient Design: Low power consumption with an anti-interference design for reliable operation.

Dimension (Unit: mm)

Application

Tips: How does this sensor compare to traditional COD testing methods?

Traditional COD testing typically requires reagents, chemical reactions, and laboratory analysis, which are time-consuming, costly, and generate chemical waste. In contrast, this sensor uses a reagent-free, optical method that provides results in real time. It is not only faster but also more environmentally friendly, as it eliminates the need for chemicals and reduces operational costs significantly. Additionally, the built-in cleaning system ensures consistent performance without frequent manual intervention, further enhancing its practicality for long-term monitoring.

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