Nohken Stainless Steel Capacitance Level Sensor for Water, Liquid, Air

Material Level → Capacitance Change → Sensor Signal → PLC/DCS Input → Control Logic → Actuator Commands → Process Control  A Capacitance Level Sensor measures material levels in tanks by detecting changes in capacitance between a probe and tank wall. It sends signals to a PLC/DCS, enabling automated control of pumps and valves to maintain safe levels. This ensures accurate, real-time monitoring, improves safety, reduces manual checks, and integrates smoothly into industrial automation systems.

• Accurate and reliable level measurement

• Reduced manual intervention

• Improved safety and process efficiency

• Integration with wider plant automation and SCADA systems In a chemical processing plant, a capacitance level sensor monitors the level of a corrosive liquid inside a storage tank. The sensor sends a 4-20 mA signal to the PLC, which controls the pump filling the tank.

  • When the level reaches a high threshold, the PLC stops the pump to avoid overflow.

  • If the level drops below a low threshold, the PLC starts the pump to refill.

  • Operators monitor the level data on the plant’s HMI screen and receive alarms in case of sensor faults or abnormal levels. 

  • High Accuracy and Reliability: Suitable for a wide range of materials and environmental conditions.

  • Non-moving Parts: Low maintenance and longer lifespan.

  • Versatile Application: Works for liquids, powders, and solids, including corrosive or sticky materials.

  • Fast Response: Immediate feedback for real-time process adjustments.

  • Improved Safety: Automatic control prevents overflows or dry running, protecting equipment and personnel.

  • Easy Integration: Compatible with modern industrial control systems and communication protocols.