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TDS Calculation Formula:
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Total Dissolved Solids (TDS) refers to the total amount of mobile charged ions, including minerals, salts or metals dissolved in a given volume of water. TDS is directly related to the purity of water and the quality of water purification systems.
The calculator uses the TDS formula:
Where:
Explanation: The conversion factor varies based on the ionic composition of the water. A factor of 0.64 is commonly used as a standard approximation.
Details: TDS measurement is important for assessing water quality, determining the effectiveness of water treatment systems, and ensuring water is suitable for specific applications like drinking, agriculture, or industrial processes.
Tips: Enter conductivity in μS/cm and select an appropriate factor between 0.5-0.7. For most natural waters, a factor of 0.64 provides a good estimate.
Q1: Why does the conversion factor vary?
A: The factor varies because different dissolved ions contribute differently to conductivity. The composition of dissolved solids affects the conversion ratio.
Q2: What are typical TDS levels in drinking water?
A: TDS levels below 300 mg/L are considered excellent for drinking, while levels between 300-600 mg/L are good, 600-900 mg/L are fair, and above 900 mg/L are poor.
Q3: How is conductivity measured?
A: Conductivity is measured using a conductivity meter which applies a voltage between two electrodes and measures the resulting current.
Q4: Can TDS be measured directly?
A: Yes, TDS can be measured directly by evaporating a water sample and weighing the residue, but this method is time-consuming compared to conductivity-based estimation.
Q5: Does high TDS mean water is unsafe?
A: Not necessarily. High TDS may indicate hard water or mineral content, but doesn't automatically mean the water is harmful. However, very high TDS can affect taste and indicate potential contamination.