What is the Best Industrial Explosion-proof pH Meter?

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
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Post time: Mar-31-2026