For Irrigation Ph Orp Controller by BOQU

Product Overview

1) Product overview

Product Features

- The BOQU PHG-2091 is an industrial online pH meter/controller designed for continuous measurement and control of pH in liquid solutions. It is manufactured by Shanghai Boqu Instrument Co., Ltd., an ISO-certified maker with long experience in pH/ORP instrumentation. Key nominal specs: measuring range 0–14.00 pH (temperature 0–100 °C), resolution 0.01 pH, accuracy 0.05 pH (temperature accuracy ±0.3 °C), stability ≤0.05 pH/24 h, and built-in temperature compensation.

Product Value

2) Product features

Product Advantages

- Microcomputer-based industrial control with simple operation and stable performance.

Application Scenarios

- Compatible with various pH electrodes for flexible deployment.

- Automatic temperature compensation (0–99 °C) to ensure accurate pH readings under changing thermal conditions.

- Isolated 4–20 mA output (max load 500 Ω) for integration with PLCs and SCADA.

- Two programmable relays (up to 230 V, 5 A AC) for direct control or alarm functions; adjustable delay and upper/lower threshold alarms.

- LCD display with backlight and RS485 communication for remote monitoring and data connection.

- Compact panel-mount design (96 × 96 × 110 mm; cutout 92 × 92 mm), powered by AC 220 V ±10%, 50 Hz.

3) Product value

- Provides reliable, continuous pH monitoring and automatic control to maintain water/nutrient solution quality, reduce manual intervention, and prevent damage from pH excursions.

- Enables precise chemical dosing and fertigation control, saving reagents and improving crop health and yield in irrigation systems.

- Integrates with control and data-logging systems via 4–20 mA and RS485 to support automation, traceability, and regulatory compliance.

- Stable and repeatable measurements reduce process variability in both agricultural and industrial water applications.

4) Product advantages

- Proven manufacturer: BOQU’s local manufacturing, established quality system and ISO certification support product reliability and consistency.

- High measurement performance: fine resolution (0.01 pH), good accuracy (±0.05 pH), and low drift (≤0.05 pH/24 h).

- Flexible control and communication: isolated analog output, dual relays, and RS485 enable direct control and system integration.

- User-friendly and robust: backlit LCD, simple operation, electrode compatibility and automatic temperature compensation for dependable field use.

- Compact, panel-mount form factor suited to control cabinets and field enclosures.

5) Application scenarios

- Irrigation systems: fertigation control, greenhouse nutrient solution regulation, drip and micro-irrigation pH management, and reclaimed-water irrigation monitoring.

- Agricultural facilities: hydroponics and controlled-environment agriculture where pH stability is critical to plant health.

- Water treatment and reuse: monitoring pH in filtration, disinfection, and neutralization stages tied to irrigation supply.

- Industrial and municipal uses: thermal power, chemical fertilizer, metallurgy, environmental protection, pharmaceutical, food processing and tap water pH monitoring and control.