In the fields of environmental monitoring and water treatment, TSS (total suspended solids) sensors are playing an increasingly important role. But for many people, TSS sensors may still be a relatively unfamiliar concept. So, what is a total suspended solids (TSS) sensor? What are its functions? Let’s take a deeper look.
1. What is a total suspended solids (TSS) sensor?
Total suspended solids (TSS) refers to the total amount of solid matter suspended in water in a water sample, including inorganic matter, organic matter, silt, clay, microorganisms, etc. that are insoluble in water. TSS sensor is a device used to measure the total suspended solids in water.
TSS sensors are usually measured using optical or electrical principles. Optical TSS sensors determine the TSS content by measuring the absorption, scattering or transmission of light of a specific wavelength by a water sample. Electrical TSS sensors use the influence of suspended solids on electric or magnetic fields to measure TSS content.
2. How TSS sensors work
Simply put, it emits a beam of light of a specific wavelength into the water. When the light encounters suspended particles in the water, scattering and absorption will occur. The detector inside the sensor then captures the changes in these light signals and converts them into corresponding TSS concentration values through complex algorithms.
To make it clearer, we use the following table to compare the two common optical measurement methods:
| Measurement method | Scattered light principle | Transmitted light principle |
| Principle description | Detects the scattering intensity of particles on light. The stronger the scattered light, the higher the TSS concentration | Measure the intensity attenuation of light after it passes through water. The greater the attenuation, the more suspended particles in the water and the higher the TSS concentration. |
| Advantages | Highly sensitive to tiny particles, can accurately capture low-concentration TSS changes | Relatively little interference from water color and turbidity, suitable for more complex water quality environments |
| Disadvantages | Easily affected by bubbles, plankton and other similar scatterers in the water, causing data fluctuations | For high-concentration TSS samples, the light decays too quickly and may exceed the detector’s measurement range, affecting accuracy. |
3. The role of TSS sensors
（1）Environmental monitoring
- In water environment monitoring, TSS is an important indicator. Excessive TSS content will affect the transparency of water bodies, reduce the photosynthesis efficiency of plants in water, and affect the survival and reproduction of aquatic organisms. TSS sensors can monitor the TSS content in water bodies in real time and provide accurate data for environmental monitoring departments so that timely measures can be taken to protect the water environment.
- For example, in the monitoring of natural water bodies such as rivers and lakes, TSS sensors can help monitoring personnel understand the degree of pollution in water bodies, find pollution sources in time, and take corresponding treatment measures.
（2）Sewage treatment
- In the sewage treatment process, the removal of TSS is a key link. TSS sensors can monitor the TSS content at different stages of the sewage treatment process in real time, helping operators optimize the treatment process and improve treatment efficiency.
- For example, in the process of treating sewage by activated sludge method, TSS sensors can monitor the TSS content in aeration tanks, secondary sedimentation tanks and other links, adjust parameters such as aeration volume and sludge return ratio, and ensure the sewage treatment effect.
（3）Industrial production
- In some industrial production processes, the TSS content in water also needs to be monitored. For example, in industries such as papermaking, printing and dyeing, and food processing, the TSS content in water will affect product quality and the operating efficiency of production equipment. TSS sensors can monitor the TSS content in production water in real time and provide timely feedback to companies so that they can take appropriate measures to ensure production quality and the normal operation of equipment.
4.Practical application examples of TSS sensors
Case : The secret of a large fish farm’s harvest
In a large fish farm in Guangdong, due to the lack of precise control of water quality TSS, the fish had high disease rates, slow growth, and poor breeding efficiency. After the introduction of advanced TSS sensors, farmers can adjust the water change frequency and feed amount of the breeding pond in real time based on sensor feedback. When the TSS is high, increase water changes in a timely manner to purify the water quality; when the TSS is appropriate, increase feed appropriately to promote fish growth. After just one breeding cycle, fish mortality was reduced by 30%, production increased by 25%, and the harvest was successfully achieved, and the TSS sensor played an important role.
5. Comparison of TSS Sensors with Traditional Measurement Methods
| Measurement method | TSS sensor | Traditional measurement method |
| Accuracy | High, can accurately measure TSS content in real time | Low, greatly affected by human factors |
| Convenience | Convenient and fast, can monitor in real time | Complex operation, time-consuming |
| Timeliness | Real-time feedback of measurement results | Requires a certain amount of time for analysis |
| Cost | Relatively high | Low, but high labor costs |
6. Summary
As an advanced measurement device, the total suspended solids (TSS) sensor plays an important role in environmental monitoring, sewage treatment and industrial production. It has the advantages of high accuracy, good convenience and strong timeliness, and can provide us with real-time and accurate TSS content data, helping us to better protect the water environment, improve sewage treatment efficiency and ensure the quality of industrial production.
