News - How to Choose an Industrial Explosion-Proof Conductivity Analyzer?

Choosing the right explosion-proof conductivity analyzer is crucial for safety, accuracy, and reliability in industrial environments where flammable gases, vapors, or dust may be present. Below is a comprehensive guide covering application areas, key selection points, and a recommended product.

In which industries are explosion-proof conductive analyzers mandatory?

Explosion-proof conductivity analyzers are essential in industries where hazardous atmospheres exist. Their primary role is to monitor water quality parameters—such as conductivity, salinity, TDS (Total Dissolved Solids), resistivity, and temperature—while ensuring operational safety. Key sectors include:

‌Thermal Power Generation‌ – Monitoring boiler feedwater, cooling water, and wastewater to prevent scaling and corrosion.
‌Chemical Industry‌ – Measuring electrolyte concentrations, process streams, and effluent quality in reaction vessels, pipelines, and storage tanks.
‌Oil & Gas / Petrochemicals‌ – Analyzing produced water, cooling systems, and wastewater treatment in refineries and offshore platforms.
‌Pharmaceutical & Biotechnology‌ – Ensuring water purity (e.g., WFI – Water for Injection) and monitoring CIP (Cleaning-in-Place) solutions.
‌Food & Beverage‌ – Controlling brine concentration, syrup blending, and wastewater discharge.
‌Metallurgy & Mining‌ – Monitoring leaching solutions, tailings water, and cooling circuits.
‌Environmental Monitoring‌ – Assessing industrial wastewater and effluent compliance in hazardous areas.

In these settings, the analyzer must withstand harsh conditions (e.g., moisture, corrosive chemicals, temperature extremes) while preventing ignition risks.

What key considerations should be taken into account when selecting an explosion-proof conductive analyzer?

When choosing an analyzer, focus on the following aspects:

1）‌Explosion-Proof Certification‌
Ensure the device carries international certifications (e.g., ATEX, IECEx, or local standards like NEPSI for China). The certification should match the hazardous zone classification (Zone 0/1/2 or Division 1/2).

2）‌Measurement Performance & Range‌
Verify the instrument’s conductivity range (e.g., 0.01 μS/cm to 200 mS/cm), accuracy, and compatibility with different sensor cell constants (K=0.01, 0.1, 1.0, 10.0). It should also support measurement of TDS, salinity, and resistivity if needed.

3）‌Robust Construction & Protection Rating‌
The housing should be made of durable materials (e.g., die-cast aluminum alloy) with high impact resistance and at least IP65 ingress protection for dust and water resistance.

4）‌Output & Communication‌
A 4–20 mA two-wire output is common for integration with control systems. Check load capacity under different supply voltages (e.g., 18–30 VDC).

5）‌Temperature Compensation & Sensor Options‌
The analyzer should support automatic (ATC) or manual (MTC) temperature compensation and various temperature sensors (PT100, PT1000, NTC).

6）‌Ease of Use & Maintenance‌
Look for intuitive interfaces, password-protected settings, and clear calibration procedures. Features like maintenance mode (holding 4–20 mA output) reduce downtime.

7）‌Safety Compliance‌
Follow installation guidelines (e.g., proper wiring, grounding, disconnection procedures) and ensure only trained personnel handle setup and calibration.

https://www.boquinstruments.com/2-wire-online-electrical-conductivity-analyzer-product/

EXA310 2-Wire Conductivity Analyzer by Shanghai Boqu Instrument

The ‌EXA310‌ is a robust, explosion-proof-ready conductivity analyzer designed for industrial applications. Below are its standout features:

1.‌Wide Application Coverage‌
Suitable for monitoring conductivity, salinity, TDS, resistivity, and temperature in solutions and wastewater across industries like thermal power, chemicals, environmental protection, pharmaceuticals, and food processing.

2.‌Key Technical Specifications‌

Measurement ranges:
Conductivity: 0.01 μS/cm–20,000 μS/cm (depending on sensor constant)
Salinity: 0.00–80.00 ppt
TDS: 0–130,000 mg/L (or ppm)
Resistivity: 0–20.00 MΩ·cm
Temperature sensing: PT100, PT1000, NTC10k, NTC2.252k (–40 °C to 200 °C)
Accuracy: ±0.5% F.S.; temperature error ±0.3 °C
Power supply: 18–30 VDC, 0.66 W
Output: One 4–20 mA two-wire signal
Housing: IP65-rated die-cast aluminum alloy

3.‌User-Friendly Operation‌
The analyzer features a 5-button interface and LCD display for easy navigation. Settings include:

Measurement mode selection (conductivity, salinity, TDS, resistivity)
4–20 mA range configuration
Temperature compensation (ATC/MTC)
Backlight adjustment, language switching, and maintenance mode

4.‌Safety & Reliability‌
The design complies with intrinsic safety requirements (Ui:28 V; Ii:200 mA; Pi:1.2 W). It includes warnings for proper installation, wiring, and maintenance to avoid electrical hazards.

5.‌Calibration & Troubleshooting‌
The EXA310 supports multiple calibration methods (known concentration, standard solution) and provides clear troubleshooting guidelines for issues like unstable readings, out-of-range alarms, or display problems.

By prioritizing explosion-proof certification, measurement capabilities, and ruggedness—along with considering a reliable model like the EXA310—you can ensure accurate, safe, and durable water-quality monitoring in hazardous industrial environments.