اخبار شرکت How to Choose the Right Conductivity Sensor for Ultra-Pure Water and Deionized Water Systems?

When dealing with ultra-pure water (UPW) or deionized (DI) water, precision is the highest priority. For these applications, a single-channel analog conductivity sensor must offer a very low measuring range, typically between 0.05 to 20μS/cm. In these environments, even the slightest ionic contamination can disrupt sensitive manufacturing processes in semiconductors or pharmaceuticals. To maintain the highest purity standards, the sensor often converts these readings into resistivity (measured in MΩ·cm), which is the standard metric for water quality in distillation and ion exchange systems.

The choice of housing material is equally critical for pure water. For distilled water or pharmaceutical-grade fluids, 316L Stainless Steel or Titanium alloy sensors are preferred. These materials are non-reactive and can be manufactured to meet food-grade and medical-grade standards, ensuring no ions leach from the sensor into the water. Furthermore, because ultrapure water is often part of a sterile loop, sensors that can withstand temperatures up to 120°C or 135°C are necessary for Clean-in-Place (CIP) or Steam-in-Place (SIP) sterilization cycles. By integrating a controller that displays conductivity, resistivity, and TDS, operators gain a multi-dimensional view of water purity, ensuring that the deionization resin beds are functioning correctly and that the final product meets the stringent requirements of the industry.