High Temperature (0-130℃) pH Sensor
Designed for extreme thermal environments, steam sterilizable processes, and rigorous bioreactor chemical monitoring.
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Industrial Catalog
High-Precision Electrodes & Analytical Transmitters
Manufactured under ISO 9001 certified conditions in Shanghai, engineered for high temperatures, extreme pressures, and harsh industrial water conditions.
High Temperature Sensor with PT100/1000
Integrated automatic temperature compensation (ATC) ensuring absolute analytical accuracy in fluctuating hot liquid lines.
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High-Temperature S8 Connector Electrode
Standardized PG13.5 thread and S8 plug-and-play connector designed for seamless retrofitting in process piping and tanks.
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Pharmaceutical Fermentation pH Probe
FDA-compliant non-toxic gel electrolyte, engineered to resist protein fouling during repeated SIP/CIP sterilization runs.
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pH5806 High Temperature Sensor
Certified Shanghai Brand sensor built with pressurized reference systems for deep bioreactor and boiler feed lines.
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DCA130 Online pH & EC Dual Controller
Dual-channel synchronous monitoring of pH and electrical conductivity with dual 4-20mA and RS485 Modbus RTU outputs.
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SJG-2083CS Toroidal Concentration Meter
Inductive electrodeless conductivity transmitter for heavy chemical dosing, demineralization regeneration, and CIP lines.
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IOT-485 Digital Intelligent Sensor
Microprocessor-driven edge computing probe delivering pre-calibrated digital signals straight to cloud gateways and DCS.
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Industry Intelligence
Global State of Water Conductivity Analysis & Manufacturing
Electrical conductivity (EC) is the fundamental gatekeeper metric for industrial process efficiency, boiler safety, environmental compliance, and high-purity yield.
Supply Chain Re-Engineering
Global original equipment manufacturers (OEMs) and engineering procurement contractors (EPCs) are transitioning from legacy European instrumentation brands toward Tier-1 Chinese manufacturers. Shanghai BOQU Instrument combines ISO 9001 and CE compliant fabrication with proprietary electrode formulations to deliver equivalent analytical precision at substantial operational expenditure advantages.
The Ultra-Pure Water (UPW) Imperative
The rapid expansion of semiconductor wafer fabrication and lithium-ion battery cathode washing requires continuous monitoring of resistivity approaching the theoretical limit of 18.2 MΩ·cm at 25°C (conductivity ≤ 0.055 μS/cm). China manufacturing facilities have adapted with specialized flow-through 316L and titanium electrode cells engineered to eliminate atmospheric carbon dioxide ingress.
Zero Liquid Discharge (ZLD) Monitoring
Stringent wastewater regulations require heavy industries to adopt closed-loop water treatment. Toroidal (inductive) conductivity meters have displaced contacting electrode sensors across crystallizer feeds and reverse osmosis brine streams, overcoming extreme saline encrustation and chemical erosion that typically cause rapid signal drift.
Technological Trends
Emerging Architecture in Industrial Conductivity Testing
The transition from isolated analog instrumentation to interconnected, self-compensating digital telemetry sensors.
Sensor-Level Edge Computing
Modern Chinese factories integrate ARM microprocessors within the probe connector. The sensor computes real-time four-band temperature compensation algorithms and stores factory calibration curves locally, transmitting noise-immune RS485 Modbus RTU data directly to SCADA frameworks.
Electrodeless Inductive Toroids
High-solids effluent and acid-alkali pipelines rapidly blind conventional metallic pins. Inductive conductivity sensors utilize hermetically sealed PEEK or PVDF encapsulated coils, inducing alternating magnetic fields in the process liquid to measure conductance without metallic contact.
Predictive Cell Constant Diagnostics
Through active monitoring of electrode polarization resistance and phase shifts across multi-frequency excitation voltages, our transmitters diagnose scaling buildup, coating deposition, and air pocket trapping before analytical readings drop out of calibration.
Plug-and-Play Multi-Parameter Hubs
Integrated instrument pods such as the MPG-6099Plus unite electrical conductivity with dissolved oxygen, turbidity, and pH, operating off unified processing architecture to reduce wiring complexity and panel footprints inside secondary water booster stations.
Deployment Scenarios
Localized Engineering Implementations
Field deployment matrix matching electrode constants, cell geometries, and temperature profiles across diverse operating conditions.
Thermal Power Plants & SWAS Units
Feedwater, economizer inlets, and saturated steam circuits demand dual cation and specific conductivity analysis. Our 0.01 cm⁻¹ constant titanium coaxial sensors trace micro-leaks of dissolved ionic minerals through ion-exchange resin columns down to 0.001 μS/cm, preventing turbine deposition.
Commercial Hydroponics & Fertigation
Plant nutrient uptake requires pinpoint electrical conductivity control (typically 1.2 to 2.8 mS/cm). Working in tandem with pH instrumentation on controllers like the DCA130, BOQU conductivity systems actuate peristaltic nutrient injection pumps with high repeatability.
Clean-in-Place (CIP) & Chemical Dosing
Food, beverage, and dairy manufacturing facilities utilize the SJG-2083CS toroidal meter to measure conductivity up to 2,000 mS/cm. The transmitter converts non-linear conductance signatures into direct concentration percentages (0-10% NaOH or HNO₃), reducing chemical overconsumption.
Integrated Systems
Macro-Level Industrial Water Analysis Frameworks
Shanghai BOQU Instrument delivers full-spectrum integration from raw extraction to effluent compliance discharge.
Turnkey SWAS Analyzer Racks
Complete pre-piped, pre-wired sampling racks incorporating sample conditioning units (pressure reducers, high-temperature heat exchangers, and flow regulators) coupled to specific and cation conductivity analyzers to safeguard utility and captive power steam cycles.
Cooling Tower Cycles of Concentration (CoC)
Automated blowdown skid controls utilizing contact conductivity sensors to balance water conservation with scale inhibitor limits. When mineral concentrations climb to critical thresholds, the controller actuates motorized drain valves while regulating biocide dosing feeds.
Multi-Stage Demineralizer Control
Continuous monitoring across two-bed (cation-anion) demineralizers and mixed-bed polishers. Real-time conductivity feedback detects silica break-through and sodium slippage long before total dissolved solids (TDS) cause process piping corrosion or scaling.
R&D Roadmap
Technology Roadmap: Next-Gen Water Analysis Instrumentation
Continuous investment in Shanghai BOQU's high-temperature sensor laboratory and advanced microprocessor research.
Phase 1: Architecture
Multi-Frequency Excitation
Eliminating polarization capacitance errors via dynamic frequency sweeping (50 Hz to 100 kHz) across four-electrode sensor cells, expanding dynamic range from pure water to seawater within a single probe.
Phase 2: Connectivity
Direct Cloud IIoT Integration
Integration of low-power NB-IoT, Cat-M1, and LoRaWAN transceivers directly into probe heads, enabling decentralized environmental aquifer tracking without external data loggers.
Phase 3: Materials
Extreme Temperature Ceramics
Patented ceramic-to-metal vacuum brazing developed in our high-temperature water quality sensor laboratory, sustaining continuous operations at 180°C and 2.5 MPa in supercritical chemical lines.
Phase 4: Intelligence
AI Self-Calibration Diagnostics
Embedded machine learning models detecting minor drift anomalies, identifying coating build-up on electrodes, and adjusting predictive maintenance intervals before process degradation occurs.
Technical FAQ
Frequently Asked Technical & Procurement Questions
Straightforward answers directly from our factory engineering and international application teams.
How do I select the right cell constant (K) for conductivity measurement?
The cell constant K is chosen based on sample conductivity. For ultra-pure water and boiler feedwater (<20 μS/cm), use K=0.01 cm⁻¹ to ensure high resolution. For tap water, cooling towers, and light wastewater (10 to 2,000 μS/cm), specify K=0.1 to 1.0 cm⁻¹. For high-salinity brine or chemical solutions exceeding 10 mS/cm, select K=10.0 cm⁻¹ or an electrodeless inductive (toroidal) sensor to prevent measurement saturation.
What is the difference between contacting and toroidal conductivity sensors?
Contacting sensors use metallic electrodes (stainless steel, titanium, or platinum) in direct physical contact with the liquid, ideal for clean, low-conductivity solutions. Toroidal (inductive) sensors use encapsulated toroidal coils in PEEK or PVDF to induce alternating currents in the liquid. Because toroidal sensors have no exposed electrodes, they eliminate fouling, corrosion, and polarization in heavy industrial slurry and acid lines.
Why is automatic temperature compensation (ATC) vital for accuracy?
Conductivity typically increases by 1.5% to 3.0% per degree Celsius rise due to increased ion mobility. Without precise temperature compensation referenced to 25°C, fluctuating operating temperatures result in severe measurement errors. BOQU analyzers incorporate integrated PT100 or PT1000 RTD elements alongside linear or non-linear ultra-pure water compensation algorithms.
Can BOQU sensors operate under steam sterilization (SIP) cycles?
Yes. Shanghai BOQU Instrument operates an in-house high-temperature water quality sensor laboratory. Sensors such as the pH5806 and specialized sanitary conductivity probes are built with proprietary glass formulations, pressurized reference chambers, and FDA-grade seals, enduring continuous operation up to 130°C and steam sterilization up to 135°C without calibration shift.
Is Shanghai BOQU Instrument an original manufacturer or a distributor?
BOQU is a true manufacturer founded in Shanghai in 2007. We operate two production facilities across Kangqiao and Lingang with over 4,632 m² of workshop space, over 200 employees, and an annual production capacity exceeding 100,000 instruments. We design our own optics, mold our own bodies, assemble SMT circuit boards, and conduct 48-hour burn-in tests in-house.
What communication protocols do your online analyzers support?
Our instruments provide standard isolated 4-20mA analog current loops and RS485 Modbus RTU serial communications. Our IoT digital sensor series integrates Modbus RTU directly into the probe head, eliminating external transmitters and facilitating direct wiring to PLC, DCS, SCADA, or wireless industrial IoT gateways.
Verified Industrial Fleet
Integrated Water Quality Analytical Equipment
Complete instrumentation systems calibrated and aged for 48 hours before factory dispatch, guaranteeing immediate field reliability.
pH5806 Bioreactor Sensor
Shanghai Brand certified high-temperature probe engineered for SIP steam sterilizable fermentation tanks.
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DOG-208FA High-Temp DO Sensor
Electrochemical dissolved oxygen probe with stainless steel sheath withstands repeated 130°C sterilization cycles.
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ZDYG-2088 Optical Turbidity Sensor
Infrared 90° scattered light sensor with integrated self-cleaning wiper for municipal effluent and MLSS control.
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MPG-6099Plus Multi-Parameter Rack
Wall-mounted monitoring panel unifying conductivity, residual chlorine, pH, turbidity, and temperature in one terminal.
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pHG-2081Pro Industrial Transmitter
IP65 weatherproof transmitter engineered with programmable high/low relays and dual 4-20mA output loops.
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Constant-Voltage Chlorine Analyzer
Electrochemical amperometric free chlorine detection for distribution mains, waterworks, and cooling towers.
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SWAS Trace Chemical Analyzer
Automated colorimetric wet-chemistry analyzer measuring sub-ppb silica, phosphate, and sodium in high-pressure steam.
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TOC-3042 Online Carbon Analyzer
Differential conductivity method UV-persulfate oxidation analyzer engineered for USP purified water loops.
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