Daruifuno brand online COD BOD meter controller can be used with digital COD(chemical oxygen demand) sensors to achieve continuous real-time monitoring of water quality COD values. However, it should be noted that this set of COD analyzers is mainly aimed at surface water monitoring, sewage, industrial wastewater and other industries. If the COD content is too low or even at the ppb level, you need to choose another COD Sensor. The combination of the DUC2-COD Controller and the COD351 probe can achieve COD monitoring in the range of 1~1500mg/L. Monitoring cannot be performed if it is too low or too high. Therefore, it is necessary to correctly choose products suitable for different applications in order to achieve monitoring results. The advantages of this COD controller are as follows: - Advantage 1: This set of online COD BOD controller can not only display the value of COD but also switch the display of BOD and TU values. Among them, the BOD value is obtained through a conversion coefficient, and users can set it according to their own water quality conditions. The TU value is used for compensation and cannot be used as a measurement result. If you need to monitor turbidity values, you will need to use our digital turbidity sensors.?
- Advantage 2: The DUC2-COD online COD BOD analyzer is equipped with 2 SPST relays and two 4-20mA current outputs, which can be connected to control equipment for control based on measured values. The 4-20mA can be used as a control or as an output value.
- Advantage 3: The COD BOD meter controller has a digital interface and supports modbus protocol. Users can connect the controller to industrial control equipment to achieve remote monitoring, avoiding possible risks caused by manual inspection and operation, and also increasing the stability of environmental monitoring data. Monitored data can be output and recorded through modbus.
- Advantage 4: The DUC2 series digital single-channel controllers all use wide voltage, and there are two power supplies to choose from: AC 100~240V, DC 18~36V. Moreover, our controller supports a variety of installation methods, including panel installation, pipe installation, and wall-mounted installation.?
Specification
| Product Name | TOC COD BOD TU Controller |
| Display Rang | 0-1500mg/L |
| Resolution | 0.01mg/L?? |
| Relay Control | 2 settable SPST relays with a maximum load of 3A/250VAC |
| Current Output | 2 settable 0/4~20mA active current loop outputs, max load 1000Ω |
| Communication Method | RS485 interface; MODBUS RTU; support JSON text data format |
| Display Screen | 128*64 LCD, adjustable backlight mode, adjustable display rate |
| Time/Data Record | Record 10000 historical data |
| Operating Temperature | 0～60℃，RH<95% ( no condensation) |
| Shell Material | Enhanced ABS |
| Protection Grade | IP66 |
| Dimension | 144*144*120mm |
| Mounting Method | Wall mounting, pipe clamping, panel (hole size 138*138 mm) |
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The measurement light source of the COD analyzer using the UV absorption method is usually 254nm UV light, because the absorption values of many organic compounds are relatively stable at this wavelength. Suspended solids and colloidal substances in the sample will also absorb a certain amount of ultraviolet light, affecting the accuracy of the measurement results. Therefore, in order to compensate for the influence of sample turbidity, a beam of ultraviolet light is added as a reference light source to compensate for the deviation caused by turbidity, thereby calculating a more accurate sample ultraviolet absorbance.
Delfino company focuses on the research, development and production of water quality instruments. Our main products include pH ORP analyzer, conductivity analyzer, turbidity analyzer, COD analyzer, dissolved oxygen analyzer, ammonium analyzer, chlorine analyzer, etc. This online COD BOD analyzer is widely used in urban sewage treatment plants, chemical plants, hospitals, scientific research institutions and other fields, providing an effective and accurate COD measurement. However, it should be noted that compared with the data measured by the potassium dichromate digestion method, the COD analyzer based on the UV absorbtion method is not very accurate and can usually only be used as a reference for a trend. Therefore, if the COD concentration value at the discharge outlet is very low and high accuracy requirements are required, it is still necessary to use an online COD analyzer with high-temperature digestion using potassium dichromate method for monitoring. However, this instrument requires the use of chemical reagents, which consumes a lot of time and take a long time, but the measurement is accurate. Therefore, users also need to choose a suitable online COD BOD analyzer according to their different processes and monitoring purpose. If you are interested in our products, feel free to contact us.?
Suzhou Delfino Environmental Technology Co., Ltd.
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