FOXBORO 873RS‑BIPFGZ‑T Resistivity Analyzer Transmitter

Product Description

The 873RS‑BIPFGZ‑T is a Foxboro 873 series industrial resistivity analyzer transmitter, designed for online water quality monitoring. It accepts signals from resistivity sensors and calculates water resistivity or conductivity values. Equipped with a metal field‑mount enclosure, local LED display and membrane keypad, it provides isolated analog output and relay alarm contacts. This transmitter can work independently or connect to Foxboro I/A Series DCS systems, widely used for high‑purity water and deionized water measurement under continuous industrial operating conditions.

Product Functions

• Collect and process signals from one or two resistivity sensors
• Real‑time calculation and display of liquid resistivity (MΩ·cm) and conductivity
• Temperature compensation to eliminate measurement deviation caused by water temperature changes
• Isolated 4‑20mA analog output for DCS or PLC system transmission
• Programmable high/low limit relay alarm outputs for abnormal water quality
• Local keypad calibration, parameter setting and measurement mode configuration
• Built‑in self‑diagnosis for sensor break, short‑circuit and circuit faults
• Field metal enclosure, suitable for on‑site pipe or panel installation

Application Scenarios

• Power plant boiler feedwater and condensed water purity monitoring
• Electronics factory ultra‑pure water (UPW) production and treatment systems
• Pharmaceutical and food industry deionized water process monitoring
• Reverse osmosis RO, ion exchange and water purification equipment
• Chemical plant cooling water and steam condensate quality analysis
• Water treatment DCS online water‑quality continuous monitoring cabinets

Common Problems

• No reading or blank display：power supply failure, loose power terminal connection
• Unstable and jumping resistivity values：sensor fouling, cable interference or poor grounding
• Measurement drift and large error：calibration expiration, sensor aging or temperature compensation failure
• 4‑20mA output deviation：output circuit damage, incorrect range configuration
• Continuous false alarm：wrong alarm threshold setting or sensor surface contamination
• Sensor fault diagnostic alert：cable open/short circuit, electrode damage
• Intermittent signal loss：moisture in terminal compartment or vibration‑induced poor contact