Core Salinity & Conductivity Measurement Portfolio
Engineered to eliminate signal drift across dynamic salinities and extreme thermal profiles. Fully integrated with automated PLC/SCADA systems.
S8 High-Temp Connector pH/EC Sensor
Designed for harsh chemical and salinity reaction lines with robust S8 plug-and-play water-tight connectivity.
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High Temp (0-130℃) Process Sensor
Wide-temperature baseline compensation for accurate electrical conductivity calibration up to 130°C steam sterilisation.
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Fermentation Salinity/pH Sensor
Pressurized gel reference electrolyte designed to resist protein contamination in high-density broth fermentation.
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0-130℃ High-Precision Sensor
Industrial electrode housing providing zero-drift conductivity and pH tracking in corrosive brine circuits.
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pH5806 High-Temp Electrode
Flagship design validated for severe chemical environments and high-salinity organic solvents with certified longevity.
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DOG-208FA Process DO/EC Sensor
High-temp dissolved gas and salinity-compensated probe ensuring closed-loop feedback in aerobic bio-reactors.
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IOT-485 Digital Interface Sensor
Integrated onboard microprocessor providing direct RS485 Modbus RTU analytics straight to industrial cloud nodes.
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DCA130 Online pH/EC Analyzer
Simultaneous multi-parameter monitoring for conductivity, TDS, and salinity with programmable relay alarms.
Product SpecificationsThe Physics of Electrolytic Conductivity & Salinity Measurement
Understanding cell constant selection, polarization limits, and inductive toroidal technology in modern industrial automation.
Electrolytic Cell Constant (K)
Conductivity meters convert raw resistance into conductance ($G = 1/R$) using cell geometry: $\kappa = G \cdot K$. Choosing between K=0.01 cm⁻¹ for ultra-pure water and K=10.0 cm⁻¹ for concentrated seawater brine is fundamental to prevent electrode saturation and non-linear polarization errors.
Inductive Toroidal Sensing
In aggressive, fouling, or hypersaline media (>100 mS/cm), contacting electrodes succumb to scaling and galvanic drift. Inductive toroidal conductivity utilizes two internal toroids (drive and pickup coils) encased in PEEK or PVDF, ensuring zero-maintenance chemical isolation for continuous acid and caustic lines.
Thermal Matrix Algorithms
Because electrolytic mobility varies by 1-3% per °C, precision meters run multi-tier algorithms: Linear coefficients ($\alpha$) for basic monitoring, non-linear neutral matrix algorithms for pure water SWAS boiler loops, and the Practical Salinity Scale (PSS-78) for marine and desalted water validation.
Industrial Verticals & Engineering Architectures
From thermal power cycle balance to pharmaceutical CIP validation: Deploying resilient online sensors across global plants.
Seawater Desalination (SWRO)
Membrane separation in reverse osmosis requires multi-stage salinity profiling. Sensors measure feed seawater conductivity (45,000–55,000 μS/cm), permeate purity (<200 μS/cm), and reject brine recovery to safeguard high-pressure energy recovery turbines against scaling.
Power Generation SWAS
Boiler feedwater must strictly avoid chloride and sulfate intrusion. BOQU provides specific and cation-conductivity analyzers with integrated degassing to isolate corrosive trace mineral salinities down to parts-per-billion levels in steam-water cycles.
Biopharma Clean-in-Place (CIP)
Inline electrodeless conductivity meters monitor the transition between caustic wash, acid neutralizing rinse, and WFI (Water for Injection) cycles. Rapid response times prevent product contamination and cut rinse water usage by up to 22%.
Factory Resilience, Vertical Integration & The Future
How Shanghai BOQU combines localized core material synthesis, full automation, and next-generation IoT edge micro-nodes.
| Evaluation Parameter | Legacy Western Sourcing | BOQU Factory Integrated Advantage | Engineering Benefit |
|---|---|---|---|
| Lead Times (Custom Sensors) | 8 to 16 Weeks typical | 2 to 3 Weeks (In-house Glass/PEEK) | Rapid project commissioning and minimal maintenance downtime. |
| Temperature Aging & Burn-in | Batch-sampled testing | 100% 48-Hour Continuous High-Temp Aging | Zero out-of-box failure rates on industrial commissioning. |
| Digital Architecture | Proprietary closed bus systems | Open RS485 Modbus RTU / MQTT Native | Seamless vendor-neutral integration with DCS, SCADA, and IoT clouds. |
| Cost-to-Performance Ratio | High premium for branding/logistics | Direct Manufacturer OEM/ODM Scale | 30-45% Capex savings for water plant integrators and EPC contractors. |
Phase 1: Multi-Frequency AC Drive
Dynamic switching between 100 Hz, 1 kHz, and 10 kHz excitation currents eliminates electrode double-layer capacitance errors across sudden saline spikes.
Phase 2: Predictive Glass/Electrode Diagnostics
Embedded firmware monitors real-time sensor impedance, glass resistance changes, and signal-to-noise deterioration, flagging cleaning requirements before measurement fails.
Phase 3: Wireless LoRaWAN / NB-IoT Edges
Direct-to-cloud battery-backed wireless transmitters for remote surface water, open canal monitoring, and distributed industrial discharge inspection.
International Traceability & Support Architecture
Calibrated against strict NIST standards, fully tested for global import conformity.
NIST Traceable Calibration
Every conductivity cell is calibrated in Shanghai against Standard Reference Materials (SRMs) traceable to NIST. Calibration certificates contain specific cell constants (K) to 4 decimal points and exact temperature probe curve slopes.
Certifications & Ingress Safety
Manufactured under ISO 9001 and ISO 14001, BOQU controllers feature IP65/NEMA 4X weather-proof enclosures, EMC conformity, CE directives, and ATEX explosion-proof options for petrochemical zones.
OEM/ODM White-Label Programs
Serving over 100 countries with customized branding, tailored cable lengths, specific thread types (NPT, PG13.5, Tri-clamp), and bespoke Modbus register layouts for seamless system integrator distribution.
Expert Technical & Commercial Guidance
Clarifying essential selection, maintenance, and factory questions for EPC engineers and procurement teams.
How do I choose between contacting and toroidal conductivity sensors?
What is the relationship between Salinity, TDS, and Conductivity?
How does BOQU ensure sensor stability under continuous high temperature?
Can digital sensors connect directly to a PLC without an external transmitter?
Complete Process Monitoring Systems & Sensors
Browse our proven online multi-parameter controllers, trace analyzers, and concentration monitors.
MPG-6099Plus Multi-Parameter Panel
Complete wall-mounted skid integrating conductivity, pH, turbidity, chlorine, and DO for tap networks.
Product Specifications
pHG-2081Pro Process Analyzer
Rugged IP65 controller offering dual 4-20mA outputs, relay interlocks, and RS485 communication for acid dosing.
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SJG-2083CS Concentration Meter
Toroidal electrodeless sensor calculating precise acid/caustic percentages (0-10% HNO₃, NaOH, H₂SO₄) for CIP lines.
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ZDYG-2088-01QX Turbidity Sensor
Infrared 90° scattered light system with automatic self-cleaning wiper for wastewater and clarification monitoring.
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Online Free Chlorine Analyzer
Constant-voltage amperometric sensor pairing pH compensation for stable disinfection control in potable water lines.
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Silicate / Phosphate / Trace Sodium Analyzer
Sub-ppb detection threshold protecting boiler turbine blades against catastrophic silica scaling in thermal power plants.
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TOC-3042 Online TOC Analyzer
UV-persulfate oxidation combined with differential conductivity detection for strict pharmacopeia pure water validation.
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Online COD / TP / TN / NH₃-N Analyzer
Automated wet-chemistry micro-digestion unit designed for high-salinity industrial effluent environmental compliance.
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