Description

FOXBORO 873PH-BIYFGZ pH/ORP Analyzer
FOXBORO 873PH-BIYFGZ is an online pH/ORP analyzer of the Foxboro 873 series. It belongs to the 1/4 DIN microprocessor type industrial water quality analysis instrument, used for continuous monitoring and control of water solution pH/ORP in industries such as chemical engineering, power, and water treatment.

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873PH-BIYFGZ
Core parameters
Brand: FOXBORO
Model: 873PH-BIYFGZ
Measurement object: pH / ORP (oxidation-reduction potential)
Measurement range: pH -2 ~ +16; ORP -999 ~ +1400 mV
Accuracy: pH/ORP ±0.1% FS; Temperature compensation ±0.5% FS
Temperature compensation: Automatic (Pt100/Pt1000), -10 ~ +130℃
Output signal: Isolated 4–20 mA (can be set to 0–20 mA); Modbus RTU (RS485)
Power supply: 24 VDC (18–30 V), power consumption ≤10 W
Display: 4-digit LED, pH/mV/℃ switch display
Shell / Protection: Metal shell, IP65 / NEMA 4X
Installation: 1/4 DIN panel installation
Weight: Approximately 1.2 kg
Origin: USA
Warranty: 12 months

Key features
High-precision measurement: Compatible with Foxboro 871 series sensors, long-term stable, low drift.
Dual output and communication: One analog output + one RS485, supports remote monitoring and configuration.
Wide temperature range and anti-interference: Industrial-grade temperature range, three-proof design, suitable for harsh working conditions.
Simple operation: Panel button configuration, two-level password protection, data saved during power loss.
Long cable adaptation: Pre-amplified sensor up to 152 m, non-pre-amplified up to 15 m. Typical application
Chemical / Petrochemical: Reaction vessels, circulating water, wastewater pH control
Electricity: Boiler feed water, condensate water, water treatment system
Water treatment: Municipal sewage, pure water / ultra-pure water monitoring
Pharmaceuticals / Food: Fermentation process, cleaning water pH monitoring
Metallurgy / Papermaking: Process solution acid-base balance control