Capacitive Level Switches
Capacitance level switches provide reliable point-level detection of liquids and solids, ideal for harsh, corrosive, and high-temperature processes.
Capacitive Level Switches
Capacitance level switches detect and monitor the level of liquids, granular solids, slurries, and interfaces between materials. They operate by measuring changes in capacitance caused by variations in the dielectric constant of materials in contact with their sensing elements. By using a conductive probe and the vessel wall (or a reference electrode), the capacitance switch identifies the presence or absence of material at a predefined point, activating alarms or control actions accordingly.
Unlike mechanical or optical switches, capacitance sensors have no moving parts and can perform accurately even in the presence of turbulence, vibration, temperature fluctuations, pressure variations, or build-up on sensor probes. Additionally, their sensitivity can be precisely adjusted to detect materials with very low dielectric constants, enhancing their suitability for diverse applications.
Applications for capacitance level switches include storage tanks and silos in the chemical, oil and gas, pharmaceutical, food and beverage, wastewater treatment, and agricultural industries. They provide reliable point-level detection for critical process functions such as high-level overflow prevention, low-level run-dry protection, and interface detection between immiscible fluids.
Their robust construction and capability for intrinsically safe and explosion-proof designs make capacitance level switches particularly valuable in hazardous or corrosive environments, ensuring process safety and reducing downtime.
