Description

Foxboro 871CC‑A4‑4 Contacting Conductivity Sensor

Technical Specifications

• Product Model: 871CC‑A4‑4
• Brand: Foxboro (Schneider Electric)
• Warranty: One Year
• Measurement Principle: Two‑electrode contacting conductivity / resistivity sensor
• Cell Factor: Factory‑calibrated cell factor
• Operating Temperature: 0 °C ~ +120 °C process fluid temperature range
• Max Process Pressure: 1.4 MPa (200 psi)
• Storage Temperature: ‑48 °C ~ +125 °C
• Response Time: Fast fluid‑conductivity measurement response
• Protection Class: Process‑submerged field‑instrument grade
• Accuracy Class: ±2 % cell‑factor calibration accuracy
• Output Frequency: Not applicable
• Integral Compensation: Built‑in thermistor for automatic fluid‑temperature compensation
• Wetted Materials: Glass and corrosion‑resistant metallic electrode assembly
• System Compatibility: Foxboro 873‑series transmitters and analyzers for water‑treatment and chemical‑process conductivity monitoring
• Mounting: Threaded insertion / submersion installation configuration
• Humidity: 0‑100 % RH field‑environment capability
• Weight: 0.27 kg
• Dimensions: Standard threaded process‑sensor probe footprint
• 

Product Overview

871CC‑A4‑4 is contacting‑type conductivity sensor for Foxboro analytical instrument family. It measures liquid conductivity or resistivity in water‑treatment plants, power‑plant boiler‑water circuits and chemical‑process loops. Integrated thermistor provides real‑time fluid‑temperature compensation to improve measurement accuracy under variable process‑temperature conditions. Requires pairing with compatible Foxboro transmitter/analyzer unit for signal conditioning and 4‑20 mA output. Surplus and refurbished tested spare process‑analytical sensor for legacy‑plant instrument‑replacement‑projects.

Application Notes

‑ Select wetted‑material compatibility matching process‑fluid chemical composition. ‑ Perform regular on‑site calibration using standard conductivity buffer solutions. ‑ Avoid mechanical impact to glass probe body during installation and handling. ‑ Typical deployment: process‑plant conductivity‑sensor spare‑part stocking.