Water Conductivity Conversion Calculator

Conductivity and Resistivity Formula:

\[ \text{Conductivity (µS/cm)} = \text{Resistivity (Ω·cm)}^{-1} \times 10^6 \]

Conversion Result:

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1. What is Water Conductivity and Resistivity?

Conductivity and resistivity are reciprocal properties that measure water's ability to conduct electric current. Conductivity measures how well water conducts electricity, while resistivity measures how strongly water resists electric current flow.

2. How Does the Calculator Work?

The calculator uses the fundamental relationship:

\[ \text{Conductivity} = \frac{1}{\text{Resistivity}} \times 10^6 \]

Where:

Conductivity — Measured in microsiemens per centimeter (µS/cm)
Resistivity — Measured in ohm-centimeters (Ω·cm)
10^6 — Conversion factor for units

Explanation: This relationship shows that conductivity and resistivity are inversely proportional - as one increases, the other decreases.

3. Importance of Conductivity Measurement

Details: Water conductivity is crucial for assessing water purity, monitoring industrial processes, environmental testing, and ensuring water quality in various applications from drinking water to pharmaceutical manufacturing.

4. Using the Calculator

Tips: Enter either resistivity or conductivity value. The calculator will automatically compute the corresponding value. Values must be greater than zero.

5. Frequently Asked Questions (FAQ)

Q1: What is the relationship between conductivity and TDS?
A: Total Dissolved Solids (TDS) can be estimated from conductivity using conversion factors, typically TDS (ppm) = Conductivity (µS/cm) × 0.5-0.7.

Q2: What are typical conductivity values for different water types?
A: Distilled water: 0.5-5 µS/cm, Drinking water: 50-500 µS/cm, Sea water: ~50,000 µS/cm, Industrial wastewater: up to 10,000 µS/cm.

Q3: Why does temperature affect conductivity?
A: Conductivity increases with temperature as ions move faster. Measurements are often standardized to 25°C for comparison.

Q4: What is ultra-pure water resistivity?
A: Ultra-pure water can have resistivity up to 18.2 MΩ·cm (18,200,000 Ω·cm) at 25°C.

Q5: How accurate is this conversion?
A: The mathematical relationship is exact. Accuracy depends on measurement precision and temperature compensation.