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The principle of the turbidity sensor is based on the combined infrared absorption and scattered light method. The ISO7027 method can be used to continuously and accurately determine the turbidity value. According to ISO7027 infrared double-scattering light technology is not affected by chromaticity to determine the sludge concentration value.
The self-cleaning function can be selected according to the use environment. Stable data, reliable performance; built-in self-diagnosis function to ensure accurate data; simple installation and calibration.
The electrode body is made of 316L stainless steel, which is corrosion-resistant and more durable. The seawater version can be plated with titanium, which also performs well under strong corrosion.
IP68 waterproof design, can be used for input measurement. Real-time online recording of Turbidity/MLSS/SS, temperature data and curves, compatible with all water quality meters of our company.
0.01-400NTU-2000NTU-4000NTU, a variety of measuring ranges are available, suitable for different working conditions, the measurement accuracy is less than ±5% of the measured value.
Digital MODBUS RS485 interface
90° scattering measurement
Great ambient light rejection
| Model No. | EL7820/EL7821/EL7830 |
| Power/Output | 9~36VDC/RS485 MODBUS RTU |
| Measurement mode | 90°IR scattered light method |
| Dimensions | Diameter 50mm*Length 223mm |
| Housing material | POM+316 Stainless steel |
| Waterproof rating | IP68 |
| Measurement range | 0.01-400 NTU/2000NTU/4000NTU |
| Measurement accuracy | ±5% or 0.5NTU,whichever is grater |
| Pressure resistance | ≤0.3Mpa |
| Measuring temperature | 0-45ºC |
| Calibration | Standard liquid calibration, water sample calibration |
| Cable length | Standard 10m,can be extended to 100m |
| Thread | G3/4 |
| Installation | Immersion type |
| Application | General applications, rivers, lakes, environmental protection, etc. |
Turbidity monitoring of water from waterworks, water quality monitoring of municipal pipeline network; industrial process water quality monitoring, circulating cooling water, activated carbon filter effluent, membrane filtration effluent, etc.

Elian Sensing is a high-tech company integrating production.R&D,sales and engineering services.Relying on the rich high-tech rosources in Xi'an,we have carried out technlcal cooperation with many universities and scientific research institutions, constantly breaking through technical barriers,improving product performance,and using leading technology to provide high-quality products for the water quallty monitoring industry. Based on the current rapid development of the Interet of Things technology,we launched a wireless water quality monitoring solution,combining smart terminals and traditional display units through wireless transmission to achieve real-time dynamic water quality monitoring functions such as data cloud display,remote cloud control,and upper and lower limit alarms.
We are committed to the water quality monitoring industry,actively innovating and improvingproducts,and optimizing industry application solutions.We take technology and quality as thecornerstone,honesty and service as the foundation.do a good job of water quality monitoring withour heart.and contribute to the development of the water quality monitoring industry.

Q: Is your company a manufacturer??
A: Yes,we are a professional manufacturer of online water quality monitoring products: oil in water sensor/ DO sensor/ NH4-N
sensor / ORP / COD sensor / Blue-green algae sensor /Conductivity sensor /TDS / TSS /MLSS,ect.
Q: What parameters do you need for product selection?
A: Application, Range, Power supply and Output signal.
Q: Can you offer OEM services?
A: Yes,we support OEM and ODM products according to your requirements.
Q: What are your terms of payment and delivery time?
A: We could accept T/T, Paypal, Western Union, Credit Assurance. Generally, we will arrange the shipment within 3-7 days after
received payment.
Q: How about warranty?
A: 12 months warranty
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