了解 TDS 计的作用：它测量什么？

总溶解固体 (TDS) 计是水处理、水族箱维护、水培和水池维护等各个领域的必备工具。它是测量液体中溶解物质总浓度的装置。但 TDS 测量仪到底测量什么？本文旨在全面了解 TDS 计的作用及其测量的物质。

型号	NTU-1800在线浊度测试仪
范围	0-10/100/4000NTU或根据要求
显示	液晶屏
单位	南洋理工大学
DPI	0.01
准确度	±5% FS
Repeatability	±1%
Power	≤3W
Power Supply	AC 85V-265V±10% 50/60Hz or
Power Supply	DC 9~36V/0.5A
Working Environment	Ambient temperature:0～50℃;
Working Environment	Relative humidity≤85%
Dimensions	16080135mm(Hanging) or 96*96mm(Embeded)
Communication	4~20mA and RS-485 communication (Modbus RTU)
Switched output	Three-way relay,capacity 250VAC/5A

A TDS meter measures the total amount of mobile charged ions, including Minerals, salts, or metals dissolved in a given volume of water. These substances can be both organic and inorganic, and they can originate from natural sources, sewage, urban run-off, industrial wastewater, and Chemicals used in the water treatment process. The TDS meter detects these substances by measuring the electrical conductivity of the water, which increases with the presence of dissolved salts and minerals.

The substances measured by a TDS meter can be broadly categorized into positive cations and negative anions. Cations include calcium, magnesium, potassium, and sodium, which are essential for human health and are commonly found in Drinking Water. Anions, on the other hand, include carbonates, nitrates, bicarbonates, chlorides, and sulfates. These substances can also be beneficial for health, but their excessive presence can Lead to water hardness and other water quality issues.

However, it’s important to note that a TDS meter does not distinguish between harmful and beneficial substances. It merely provides a total count of all dissolved solids. Therefore, while a high TDS reading may indicate a high concentration of harmful substances such as lead or Copper, it could also mean a high concentration of beneficial minerals like calcium or magnesium.

The TDS level in water can significantly impact its taste, odor, and appearance. Low TDS Levels can result in bland-tasting water, while high TDS levels can lead to a salty or bitter taste. Moreover, high TDS levels can cause water to appear cloudy or colored, which can be unappealing to consumers. Therefore, monitoring the TDS level is crucial for maintaining the aesthetic quality of drinking water.

In addition to aesthetic quality, TDS levels can also affect the functional aspects of water. For instance, high TDS levels can lead to scale formation in pipes and appliances, reducing their efficiency and lifespan. Furthermore, certain dissolved solids can react with disinfectants used in water treatment, forming harmful by-products. Therefore, controlling the TDS level is essential for ensuring the Safety and longevity of water supply systems.

In conclusion, a TDS meter measures the total concentration of dissolved substances in water, including both beneficial and harmful substances. It plays a crucial role in maintaining the aesthetic and functional quality of water, making it an indispensable tool in various fields. However, it’s important to remember that a TDS meter provides a general measure of water quality and should be used in conjunction with other water testing methods for a comprehensive assessment.