Wholesale Two Electrode Conductivity Sensor Wholesaler & Pricelist

Two-Electrode (Contacting) Physics

Two-electrode conductivity sensors utilize an alternating potential applied across two precision-machined conductive surfaces (Platinum, 316L Stainless Steel, or Titanium). By measuring the resulting current flow through the electrolytic solution, the device calculates ionic conductance ($G$).

• Optimized Cell Constants: $K = 0.01\text{ cm}^{-1}$ for UPW, $K = 0.1\text{ cm}^{-1}$ for RO water, and $K = 1.0\text{ cm}^{-1}$ for potable water.
• AC Excitation: High-frequency AC excitation suppresses double-layer polarization impedance.

Dynamic Thermal Compensation

Electrolytic conductivity fluctuates heavily with temperature, exhibiting standard coefficients between 1.8% to 2.2% per °C. Our two-electrode assemblies integrate hermetically potted RTD temperature elements directly inside the probe tip.

• Pt1000 Class A Standards: Ultra-fast thermal response latency (<8 seconds).
• Firmware Algorithms: Dynamic linear and non-linear ultrapure water matrix compensation according to ASTM D1125 and DIN EN 27888.

Why Procurement Chooses Contacting Cells

While toroidal (electrodeless) sensors dominate heavy chemical slurries, two-electrode sensors are unrivaled in sensitivity at low conductivities (0.055 µS/cm to 2,000 µS/cm). They provide the fastest response and highest accuracy for high-purity applications.

• Minimal Footprint: Micro-bore 1/2" and 3/4" NPT process connections fit tight piping layouts.
• Low Capital Cost: High precision without the budgetary impact of inductive systems.

Thermal & Nuclear Power (SWAS)

In high-pressure steam turbines and superheated boilers, microscopic ionic impurities induce stress corrosion cracking and destructive blade deposition. Two-electrode cells monitoring specific conductivity, cation conductivity (after strong acid cation exchange resin), and degassed conductivity provide early warnings against condenser tube breaches.

Semiconductor & Electronics UPW

Microchip wafer fabrication requires Ultrapure Water (UPW) reaching the theoretical resistance limit of 18.2 MΩ·cm at 25°C (0.055 µS/cm conductivity). Contacting cells with high polish finishes and precision cell constants are the only sensor topologies capable of verifying ionic purity at these trace levels.

Pharmaceutical Purified Water & WFI

Compliance with USP <645> and EP European Pharmacopoeia water purity dictates uncompensated raw conductivity stages. Our sanitary two-electrode sensors offer 1.5” Tri-Clamp fittings, surface finishes with $Ra < 0.4\,\mu\text{m}$, and materials compliant with FDA CFR 2177 rules for steam sterilizable bioprocess loops.

Industrial Desalination & RO Systems

Two-electrode sensors track reverse osmosis rejection efficiency across permeate channels. Real-time feedback alerts operators to membrane rupture, chemical scaling, or seal leaks, allowing for automatic diversion before contaminated product reaches storage tanks.

Cooling Towers & Boiler Blowdown

Excess cycles of concentration cause salt crystallization and heat exchanger foul. Two-electrode sensors monitor cycling levels and trigger blowdown valves automatically when conductivity thresholds are exceeded, preserving equipment efficiency and saving water treatment chemicals.

Precision Hydroponics & Fertigation

Continuous closed-loop irrigation requires accurate electrical conductivity monitoring to maintain ideal nutrient uptake balances. Two-electrode systems prevent fertilizer burns and optimize crop yields across multi-tiered greenhouse operations.

International Compliance Assured

Our instruments operate under certified ISO 9001 and ISO 14001 quality and environmental management systems. Products hold valid CE certificates for European industrial electromagnetic immunity and meet FDA material standards for wetted contact components.

Global Export Logistics

Direct shipments dispatched daily via DHL, FedEx, air freight, or sea container. Standard configurations ship within 48 to 72 hours, backed by full commercial documentation including Certificates of Origin (CO), Form E, and detailed material mill certificates.

Engineering Support Services

Dedicated application engineers assist with process pipeline sizing, material compatibility matching, transmitter configuration, and integration with third-party distributed control systems (Yokogawa, Emerson, Siemens, ABB).