1. Basic Information

FOXBORO 873EC-JIPFGZ is a high-performance electrodeless conductivity analyzer. It is defined as an industrial high-precision measuring device for aqueous solution conductivity, specially designed for industrial process control, water quality monitoring and other applications. It accurately measures the conductivity value of aqueous solution and indirectly evaluates ionic concentration, serving as essential equipment for process control and qualified water quality monitoring in chemical, power, pharmaceutical, environmental protection and other industries.

Adopting electrodeless measuring technology, it effectively avoids corrosion and contamination defects existing in traditional electrode measurement, and realizes accurate conductivity detection of aqueous solution. Equipped with automatic temperature compensation function, it can correct measurement deviation in a wide temperature range to guarantee data accuracy. It supports switching of multiple measuring units and provides isolated output signals, which can be seamlessly connected with DCS systems and data acquisition devices to realize real-time data transmission and remote monitoring, fully meeting automatic control demands of industrial sites.

2. Technical Specifications

2.1 Core Electrical & Measuring Specifications

• Measuring Range: Conductivity measuring range: 0~2000 μS/cm (expandable to higher ranges), meeting detection demands of pure water, process water, wastewater and other aqueous solutions with different concentrations.
• Measuring Accuracy: Measurement error ≤ ±1% FS. It delivers high-precision measurement to accurately reflect changes of ionic concentration in solutions and provide reliable data support for process control.

• Measuring Units: Switchable among μS/cm, mS/cm and percentage (%), freely select display modes according to on-site requirements.

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• Temperature Compensation: Built-in temperature sensor with automatic temperature compensation function (compensation range: 0℃~100℃). It automatically corrects temperature interference on conductivity measurement and ensures stable accuracy under different temperature conditions.
• Power Supply: 24VDC power supply (110/220VAC optional), power consumption ≤10W. Stable power input with strong anti-voltage fluctuation capability, suitable for standard industrial power distribution.
• Output Signal: Proportional isolated output signal (standard 4-20mA current signal). It supports data transmission to external receivers, DCS systems and data acquisition modules for remote monitoring and data linkage.

• Environmental Adaptability: Operating temperature: -10℃~60℃; Storage temperature: -20℃~70℃; Operating humidity: 5%~95% (non-condensing). It has fine dustproof and moistureproof performance to adapt to harsh industrial working conditions.

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2.2 Physical & Structural Specifications

• Installation Mode: Two optional types: plastic panel mounting and metal housing mounting. The panel type provides 1-channel output signal, while the metal housing type supports 2-channel output signals. It can be flexibly installed at field measuring points or in control rooms with easy assembly.
• Overall Dimensions: Plastic panel type: 140mm×100mm×80mm (L×W×D); Metal housing type: 160mm×120mm×90mm. Compact structure saves installation space and fits various installation scenarios.

• Weight: Plastic panel type: approx. 0.5kg; Metal housing type: approx. 0.8kg. Lightweight design facilitates field installation, disassembly and maintenance.

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• Enclosure & Wiring: Adopts industrial rugged enclosure. Metal housing version features excellent EMC resistance, dustproof and moistureproof performance against severe field environments. Power ports, signal output ports and measuring ports are arranged separately for convenient wiring and firm connection with anti-loose structure to ensure stable power supply and signal transmission.

• Product Features: Modular design enables independent operation or integration into industrial automatic systems. Equipped with multi-functional display screen to directly show measured values, temperature, diagnostic data and other information with user-friendly interface. Built-in diagnostic function monitors operating status in real time and feeds back fault prompts timely.

2.3 Core Functions & Compatibility Specifications

• Core Functions: Adopt electrodeless measuring technology to eliminate electrode corrosion and contamination and extend service life; high-precision conductivity measurement with multi-unit switching; automatic temperature compensation ensures accurate measurement in wide temperature range; isolated signal output realizes real-time data transmission; built-in diagnosis facilitates troubleshooting; manual calibration function guarantees long-term measuring precision.

• Integrated Features: Highly integrated design realizes conductivity measurement, temperature compensation and signal output all-in-one without extra auxiliary equipment, simplifying system construction and lowering deployment costs. Parameters setting, unit switching and calibration can be completed via panel buttons without professional operation.

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• Compatibility: Seamlessly connectable with Foxboro I/A Series DCS and other brand industrial control systems via 4-20mA isolated signal for data linkage. It can be directly mounted on process pipelines and sampling points without complex adapters, and is compatible with standard calibration solutions for convenient on-site maintenance.
• Reliability & Practicability: Industrial-grade design with outstanding vibration resistance and anti-interference performance, low failure rate and reduced system maintenance costs. Electrodeless structure cuts maintenance frequency and avoids frequent electrode replacement. Equipped with display and diagnostic functions, it greatly improves on-site operation and troubleshooting efficiency.

3. Working Principle

1. System Initialization & Parameter SettingAfter power-on, 873EC-JIPFGZ automatically completes self-inspection and system initialization to check the working status of internal measuring circuits, temperature sensors and output interfaces, and enters ready state without faults. Operators set measuring range, display unit, temperature compensation parameters and calibration parameters through panel buttons or upper computer system to finish field matching.
2. Measurement Preparation & Signal CollectionPut the measuring probe into tested aqueous solution in process pipelines or sampling containers. The instrument applies high-frequency alternating electric field to the solution through electrodeless measuring technology, effectively avoiding polarization phenomenon caused by traditional electrode measurement and preventing measuring distortion due to ion deposition. Meanwhile, the built-in temperature sensor collects real-time solution temperature data for temperature compensation calculation.

1. Signal Processing & Value ConversionThe instrument detects the conductivity of solution under high-frequency alternating electric field to indirectly obtain solution resistance value. Combined with the fixed cell constant and the inverse proportional relationship between conductivity and resistivity, it calculates the original conductivity value. Then automatic temperature compensation algorithm revises temperature influence to obtain final accurate measuring data.
2. Data Display & Signal OutputThe compensated conductivity value and solution temperature are displayed on the screen in real time for on-site viewing. Meanwhile, the measured data is converted into standard 4-20mA isolated signal and transmitted to DCS systems and data acquisition units to realize remote monitoring and process linkage control.
3. Calibration & Fault DiagnosisThe instrument supports manual calibration by using standard calibration solutions such as 0.01mol/L KCl solution to keep long-term measuring accuracy. The built-in fault diagnosis system monitors running status all the time. Once abnormal measurement, sensor failure or signal output fault occurs, corresponding alarm information will be displayed on the screen for rapid troubleshooting.

4. Application Scenarios

4.1 Power Industry

It is used for water quality monitoring of boiler water, cooling water and circulating water in thermal power plants and hydropower stations. It accurately measures water conductivity to evaluate water purity, prevent scale formation and equipment corrosion, and ensure safe and stable operation of power facilities. It is also applied in power plant wastewater treatment to monitor treatment effect and meet discharge standards.

4.2 Chemical Industry

It is used for process control in chemical production such as solution reaction and product purification. It tracks real-time changes of solution ionic concentration via conductivity measurement to ensure production process compliance. It also monitors chemical wastewater treatment process to guarantee effluent quality meets environmental protection regulations.

4.3 Pharmaceutical Industry

It is widely used in pure water preparation and process water quality monitoring for pharmaceutical production. It strictly controls water conductivity to make water quality meet pharmaceutical industry standards and prevent impurity ions from affecting drug quality. It also supervises pharmaceutical wastewater discharge to satisfy industrial environmental requirements.

4.4 Food & Beverage Industry

It fits pure water preparation, raw material cleaning and product processing links in food and beverage production. It controls production water purity through conductivity detection to ensure product quality and safety, and monitors production wastewater treatment to realize environmentally friendly and compliant production.

4.5 Environmental Protection & Water Treatment Industry