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Conductivity sensor
Conductivity sensors, also known as conductivity transmitters or conductivity probes, are precision instruments designed to measure the electrical conductivity of liquids, which directly correlates to the concentration of dissolved ions. These sensors operate by applying an alternating voltage between two electrodes and measuring the resulting c...
Conductivity sensors, also known as conductivity transmitters or conductivity probes, are precision instruments designed to measure the electrical conductivity of liquids, which directly correlates to the concentration of dissolved ions. These sensors operate by applying an alternating voltage between two electrodes and measuring the resulting current, with the conductivity value expressed in microsiemens per centimeter (µS/cm) or millisiemens per centimeter (mS/cm). Key technical parameters include measurement range (e.g., 0-200 µS/cm for pure water up to 0-200 mS/cm for concentrated solutions), cell constant (K-value typically 0.01, 0.1, 1.0, or 10.0 cm⁻¹), temperature compensation (automatic or manual via integrated PT100/PT1000), and output signals (4-20 mA, 0-10 V, or digital protocols like Modbus RTU). Materials of construction vary from stainless steel and titanium for industrial environments to graphite or platinum for high-purity applications. These sensors are available in insertion, immersion, or flow-through configurations, with process connections such as ½" NPT, G1/2, or Tri-Clamp for hygienic applications. In the global market, they are referred to as conductivimeters, conductivity meters, or specific conductance sensors, and are critical for monitoring water quality, chemical concentration, and process control.
These sensors are deployed across a wide range of industrial sectors, including water and wastewater treatment for monitoring TDS (total dissolved solids) and salinity, chemical processing for concentration control of acids, bases, and salts, and the food and beverage industry for CIP (clean-in-place) verification and product quality assurance. In power generation, they monitor boiler feedwater and steam condensate purity to prevent scaling and corrosion. Pharmaceutical and semiconductor manufacturing rely on ultra-pure water conductivity sensors to meet stringent resistivity standards (18.2 MΩ·cm). Environmental monitoring stations use them for river and groundwater quality assessment, while HVAC systems employ them for cooling tower blowdown control. Installation environments include panel-mounted transmitters, inline process pipes, and submersion in open tanks or channels.
Key subcategories within conductivity sensors include two-electrode sensors for general-purpose applications, four-electrode sensors for high-conductivity or fouling-prone media, and inductive (toroidal) sensors for aggressive or viscous fluids. Main article codes often follow a structured pattern, such as "COND-2E-100" for a two-electrode sensor with a 100 µS/cm range, or "COND-4E-500" for a four-electrode model with a 500 mS/cm range. Specific examples include the "COND-2E-010" for ultra-pure water (0-10 µS/cm), "COND-4E-2000" for industrial wastewater (0-2000 mS/cm), and "COND-IND-100" for inductive sensors in corrosive media. These codes typically incorporate the sensor type, measurement range, and cell constant, ensuring easy identification for procurement and replacement.
Partnering with Electric Automation Network ensures access to a comprehensive inventory of conductivity sensors from leading global manufacturers, with real-time pricing and availability. Our engineering team provides personalized technical support for sensor selection, calibration, and integration into existing control systems. We offer express worldwide shipping, ensuring critical components reach your facility within days, not weeks. Each product listing includes detailed technical documentation, including datasheets, wiring diagrams, and installation manuals, enabling informed decision-making. Whether you need a replacement probe for a water treatment plant or a complete conductivity measurement system for a new process line, we deliver the expertise and logistics to keep your operations running efficiently.
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