Portable Water Digital EC Conductivity Meter for Laboratory

In ultra-low conductivity water, ionic mobility changes non-linearly with temperature.

Standard linear compensation may introduce deviation under 10 μS/cm conditions.

Pure water compensation applies a temperature-dependent algorithm optimized for low ionic concentration solutions, improving accuracy in ultrapure water systems such as RO/DI and pharmaceutical purified water loops.

TDS is calculated from conductivity using a multiplication factor (typically 0.40–0.70).

The correct factor depends on ionic composition:

• NaCl-dominant solutions: ~0.5

• Natural water mixtures: ~0.65

• Industrial process water: application-specific

Incorrect TDS factor selection leads to systematic deviation. The adjustable TDS coefficient ensures application-specific calibration alignment.

The cell constant (K) determines sensitivity range:

• K=0.1 → low conductivity / ultrapure water

• K=1.0 → general water testing

• K=10 → high conductivity / brine solutions

Proper matching ensures optimal resolution and minimizes polarization effects. Adjustable cell constant configuration improves cross-application flexibility.

High-salinity solutions (>100 mS/cm) may introduce:

• Electrode polarization

• Temperature gradient deviation

• Non-linear conductivity behavior

• Incomplete temperature equilibration

Using appropriate cell constants and allowing sufficient stabilization time reduces high-range deviation.

Ultrapure water typically measures below 2 μS/cm.

At such low levels, small contamination events produce minimal conductivity change.

High resolution enables early detection of ion breakthrough in RO/EDI systems, protecting downstream industrial processes.

IP65 rating ensures:

• Dust-tight enclosure

• Protection against low-pressure water jets

• Resistance to outdoor humidity and splashing

This enables stable performance in wastewater plants, cooling systems, field sampling, and industrial environments without compromising measurement integrity.