The traditional method for determining the transparency of water quality is mostly the Saybolt disk (transparency disk) measurement. This method has been used abroad for over 100 years to observe the transparency of water. The use of the Saybolt disk to observe water transparency in China began around the 1920s and 1930s. Initially, this method was mainly applied to aquaculture. After the 1970s, with the development of environmental protection, the use of transparency as an observation indicator was not only used to judge the quality of water environment and the degree of eutrophication, but also an important indicator and basis for judging water quality level, water nutrition level, water primary productivity, and so on. The Scherrell disk is shown in Figure 2:

This method is simple and practical, but with the advancement of China's digital requirements for water quality monitoring, this traditional method has some limitations. Firstly, it requires manual on-site measurement. Secondly, due to the individualized differences in human eye recognition, the measurement results can only be roughly qualitative and cannot provide relatively accurate quantitative judgments. Therefore, we have developed an online monitoring sensor for water quality transparency to address this limitation and provide a digital basis for more customers to manage water transparency!

HSD-03

Online water quality transparency sensor

Introduction: The sensor principle adopts standard infrared detection technology to monitor the transparency of water bodies online. Automatically compensate for sunlight interference, voltage fluctuations, device aging, temperature changes, etc., providing real-time monitoring data.

Application areas: surface water, river channels, black and ugly water bodies, aquaculture water bodies, etc.

Technical parameters:

Range: 5-1000cm;

Resolution: 0.1cm;

Accuracy: 5% of full scale;

Repeatability: ≤ 2%；

Mean time between failures: ≥ 1440h;

Calibration: Factory calibration, can be calibrated on-site.

Signal output: isolated 4-20mA, RS-485;

Working power supply: 12VDC+10% (optional);

Power consumption: 0.6-0.8W;

Working temperature: 0-50 ℃;

Dimensions: diameter of 51mm, length of 220mm;

Material: Stainless steel 304, or POM anti-corrosion shell optional;

Fixed thread: optional with no fixed thread, or stainless steel 304 material G1/2 thread fixed at the tail, or POM material G3/4 thread;

Cable: Waterproof cable, standard 10m;

Special specifications: Stainless steel 304, M60 threaded mouth installation shell, pressure resistant to 15kg;

Installation method: Immersion installation, the maximum depth of the immersion sensor is 150m, or submerged to the depth reached during sampling, unaffected by lighting and sunlight.

Output unit: cm.

Figure 2