The E+H Condumax CLS21 is a robust analog 2-electrode conductivity sensor for all process and environmental applications. It delivers precise and reliable measurements for optimum process and product quality monitoring, featuring high chemical, thermal, and mechanical stability for long-term durability.

The sensor operates with a cell constant of k = 1 cm⁻¹, covering a measuring range from 10 µS/cm to 20 mS/cm. It includes either a Pt1000 or PTC temperature sensor for accurate temperature compensation. Process pressure rating is 246 psi at 68°F (17 bar at 20°C), with a temperature range of -4 to 275°F (-20 to 135°C). Available with IP65 (connector version) or IP67 (fixed cable) protection. ATEX certified for hazardous area applications.

Typical applications include potable water treatment, desalination plants, industrial water treatment, river/lake monitoring, and phase separation in medium conductivities such as milk/water. The sensor is compatible with various Endress+Hauser transmitters and offers installation flexibility in pipes or flow chambers.