How to Choose a TDS or Conductivity ASIC for an OEM Product

Channel count, range, probe polarization, temperature compensation and interface choices explained.

Start with the water matrix and required range. Purified water needs a different conductivity range and cell configuration from tap water or nutrient solutions.

What engineering teams should consider

Then define the channel count. One channel suits point measurement, while two or three channels can compare inlet, membrane-stage and outlet water.

Temperature correction, bipolar probe drive and a stable reference design reduce integration risk. Validate the intended probe, enclosure, cable and real water samples before finalizing the product.