The EXA300 Two-Wire pH/ORP Analyzer is an advanced online intelligent monitoring solution designed for harsh industrial environments. Developed and manufactured by Shanghai Boqu Instrument Co., Ltd., it integrates cutting-edge technology with robust safety features to deliver precise, reliable, and maintenance-free pH/ORP measurement.
Key Features & Advantages
1.Intrinsically Safe & Explosion-Proof Design
- Compliant with GB3836.1-2010 and GB3836.4-2010 standards, rated Ex ia IIC T4Ga.
- Suitable for hazardous atmospheres with ambient temperatures from -20 °C to 55 °C.
2.High Accuracy & Wide Measurement Range
- pH: 0.00–14.00 (±0.05 pH accuracy)
- ORP: -2000 mV to 2000 mV (±1 mV accuracy)
- Temperature: Pt1000: 0.0 °C–130.0 °C / NTC10k: -30.0 °C–100.0 °C (±0.5 °C accuracy)
3.Two-Wire 4–20 mA Output & Low Power Consumption
- Single 4–20 mA current-loop output for seamless integration with PLCs, DCS, or SCADA systems.
- Ultra-low power consumption (0.66 W) supports long-term operation even in remote or power-sensitive installations.
4.Rugged Construction & Easy Deployment
- Die-cast aluminum housing with IP65 protection against dust and water ingress.
- Compact dimensions (144 mm × 144 mm × 147 mm) and versatile mounting options: embedded, pipe-mount, side-wall, top-flange, immersion, and flow-through installations.
5.User-Friendly Operation & Smart Calibration
- Clear LCD display with five-button navigation for quick setup, calibration, and diagnostics.
- Multiple calibration modes: manual, two-point auto-cal, three-point auto-cal, and configurable buffer groups (JJG/NIST standards).
- Real-time electrode-status indication (excellent/normal/poor) and maintenance-mode override for stable output during sensor servicing.
Ideal Application Scenarios
The EXA300 is engineered for continuous monitoring in demanding processes:
- Chemical & Pharmaceutical Manufacturing – Precise pH/ORP control in reaction vessels, fermentation, and purification streams.
- Power Generation & Water Treatment – Monitoring of boiler feedwater, cooling-tower cycles, and effluent discharge.
- Metallurgy & Electroplating – ORP measurement for redox reactions and metal-ion concentration tracking.
- Food & Beverage Production – pH assurance in product-quality and sanitation processes.
- Environmental Monitoring – Real-time surveillance of wastewater, rivers, and industrial effluent to meet regulatory standards.
Why Choose EXA300?
✔ Safety-Certified – Explosion-proof rating ensures operation in hazardous areas.
✔ Plug and Play – Simple wiring (terminal-block defined) and quick electrode installation.
✔ Low Maintenance – Sealed housing, factory-reset capability, and comprehensive troubleshooting guides minimize downtime.
✔ Global Support – Backed by Shanghai Boqu Instrument’s technical service and after-sales network (contact: 021-33897320).
Technical Specifications at a Glance
- Power Supply: 14–28 VDC
- Output: 4–20 mA two-wire
- Load Capacity: Compatible with standard PLC/DCS input modules
- Operating Environment: -20 °C to 40 °C, ≤95 % RH (non-condensing)
- Weight: 1.35 kg
Post time: Mar-31-2026












