Engineered for high stability and minimal drift. Factory-calibrated online controllers, inductive toroidal sensors, and high-temperature electrodes with direct Modbus RS485 connectivity.
Designed for repeated CIP/SIP steam sterilization and real-time process integrity monitoring in biopharmaceutical systems.
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Built-in PT1000/NTC thermistor compensation preventing thermal drift across demanding chemical and condensation processes.
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Anti-fouling solid gel electrolyte structure resisting aggressive ionic solutions and harsh chemical wastewater channels.
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Precision standard threaded fitting ensuring hermetic sealing in pressurized pipelines and pharmaceutical bioreactors.
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Simultaneous EC and pH feedback with dual 4-20mA current loops and configurable relay triggers for automated chemical dosing.
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Electrodeless inductive conductivity analyzer engineered for acid/alkali mixing, CIP chemical dosing, and zero-corrosion monitoring.
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Microprocessor-integrated digital transmitter outputting uncompressed calibrated values directly to SCADA and cloud telemetry.
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Comprehensive turnkey station measuring conductivity, turbidity, chlorine, and pH for distribution loops and secondary supply networks.
Request Station PricingIn modern industrial process automation, the electrical conductivity (EC) of aqueous solutions serves as the primary non-destructive proxy for Total Dissolved Solids (TDS), salinity, chemical concentration, and mineral breakthrough. Wholesale procurement demands have rapidly shifted from analog stand-alone meters to intelligent IoT-embedded telemetry ecosystems.
Global EPC contractors and system builders are standardizing on native RS485 Modbus RTU and Ethernet-IP conductivity controllers. Direct fieldbus communication avoids costly secondary transmitter hardware and eliminates signal interference from nearby variable frequency drives (VFDs).
Advanced semiconductor foundries and sub-micron fabrication facilities require trace-level deionized water with resistivities approaching the theoretical limit of 18.2 MΩ·cm (0.055 μS/cm at 25°C). Wholesale buyers require tight cell constant certifications (k=0.01 to 0.1 cm⁻¹) with active non-linear temperature compensation curves.
Traditional contacted 2-electrode sensors suffer rapid polarization and chemical scaling in dirty wastewater, slurry, or strong acids. Procurement strategies prioritize electrodeless toroidal sensors encapsulated in PEEK or PVDF to achieve decade-long mean time between replacements (MTBR).
Beyond capital equipment price, procurement managers evaluate replacement probe costs, reagent-free operation, and plug-and-play field calibrations. Wholesale direct sourcing from ISO 9001 certified manufacturers yields up to 40% reductions in total system deployment expenses.
Reference wholesale tier structure for system integrators, OEM equipment manufacturers, and overseas bulk distributors. Final pricing is tiered based on annual volume commitments, custom branding, and firmware protocol customizations.
| Model / Configuration | Sensor Type & Cell Constant | Measurement Range | Outputs & Telemetry | MOQ | Wholesale Reference Price |
|---|---|---|---|---|---|
| EC-2800 Standard Controller Wall/Panel Mount Industrial |
2-Electrode Graphite / SS316L (k = 1.0 cm⁻¹) | 0.5 μS/cm – 20,000 μS/cm | Isolated 4-20mA, 2x Relay SPDT, RS485 Modbus | 5 Units | $145 – $210 / unit |
| UPW-9000 Ultra-Pure Water Analyzer Power Generation & Semi |
Concentric Titanium / 316L (k = 0.01 cm⁻¹) | 0.01 μS/cm – 20.00 μS/cm (18.2 MΩ·cm) |
Dual 4-20mA, High/Low Limits, HART / RS485 | 2 Units | $260 – $380 / unit |
| SJG-2083CS Toroidal Controller Electrodeless Chemical Dosing |
Inductive PEEK / PFA Encapsulated Toroid | 100 μS/cm – 2,000 mS/cm (0-10% Acid/Caustic) |
4-20mA Loop, Modbus RTU, 3x Dosing Relays | 2 Units | $320 – $490 / unit |
| DCA130 Multi-Channel Analyzer Dual EC + pH/ORP Control |
Dual Channel: Glass pH + Contacted EC Cell | pH: 0-14.00 pH EC: 0.1 μS/cm – 50 mS/cm |
2x Independent 4-20mA, Modbus RTU, 4 Relays | 3 Units | $290 – $410 / unit |
| IOT-485-EC Digital Smart Probe Direct Transmitter-Less |
Electrode with Embedded Microprocessor | 1.0 μS/cm – 10,000 μS/cm | Direct RS485 Modbus RTU, 12-24V DC In | 10 Units | $85 – $140 / probe |
*Note: Pricelist quotes represent standard factory packaging (FOB Shanghai). Volume OEM orders exceeding 50+ units qualify for customized firmware registers, private silkscreen labeling, and custom cable lengths without setup surcharges.
Conductivity instrumentation acts as the critical sensory gateway in mission-critical manufacturing operations. Discover how our engineering controllers stabilize process efficiency across global sectors.
Online monitoring of feed, concentrate, and permeate conductivity calculates membrane salt rejection percentages in real time. Continuous differential conductivity calculations trigger automated antiscalant dosing and warn against membrane fouling or seal degradation before irreversible damage occurs.
In thermal, nuclear, and combined-cycle power facilities, steam purity dictates turbine asset lifespan. Our cation conductivity analyzers filter samples through hydrogen ion exchange resin columns to detect trace corrosive anions (chlorides, sulfates) down to sub-parts-per-billion levels, shielding steam turbines from stress corrosion cracking.
Clean-in-Place systems in dairy, beverage, and sterile biopharma lines require continuous differentiation between rinse water, caustic wash (NaOH), and acid descaling (HNO₃) steps. Using toroidal inductive conductivity sensors enables sub-second phase separation, reducing chemical waste by up to 22% and shortening clean downtime.
As cooling water evaporates, mineral salinity concentrates, leading to heat exchanger scaling or corrosive breakthrough. Our conductivity controllers execute automatic blowdown bleed valves based on user-set cycles of concentration (CoC), balancing water conservation mandates with corrosion control.
Plant nutrient bioavailability hinges on precise electrical conductivity (EC) and pH balance. Our dual-channel controllers synchronize multi-channel peristaltic dosing pumps to administer A/B nutrient stock solutions, maintaining targeted EC within ±0.05 mS/cm to prevent root osmotic shock.
Meeting national environmental discharge standards requires zero-fail effluent quality verification. Paired with optical turbidity and heavy metal analyzers, our high-range conductivity instruments detect sudden chemical surge dumps, automatically diverting out-of-spec effluent to emergency retention ponds.
Founded in 2007, Shanghai Boqu Instrument operates two specialized production campuses spanning 4,632 m² in Pudong Kangqiao and Lingang Free Trade Zone. We do not white-label third-party components; we forge them under rigid ISO 9001 and ISO 14001 governance.
Every conductivity controller and sensor carries verified CE (Electromagnetic Compatibility & Low Voltage Directives), SGS audited production certifications, RoHS compliance, and FDA registered food-contact approvals on sanitary fluid probes.
Sensors and controllers undergo a mandatory 48-hour continuous thermal stress aging cycle in environmental test chambers before packaging. Electrode cell constants are verified in certified standard reference conductivity solutions traceable to national metrology standards.
Operating China’s pioneering dedicated high-temperature water quality sensor laboratory, BOQU validates sensors up to 130°C and 16 bar steam pressure, guaranteeing fail-safe performance during aggressive bioreactor sterilization and autoclave cycles.
As plant operations shift toward unmanned autonomous facilities, our engineering labs are advancing multi-spectral sensing, self-diagnostic predictive firmware, and zero-trust industrial wireless mesh architectures.
Integrated electrochemical impedance spectroscopy (EIS) monitoring electrode polarization, glass membrane impedance, and coating buildup to alert technicians to maintenance needs days before data accuracy fails.
Dynamic high-frequency pulse excitation eliminating ion polarization boundary layer effects, enabling single-probe dynamic measuring accuracy from 0.01 μS/cm up to 500 mS/cm without physical cell changes.
Ultra-low-power edge controllers with integrated NB-IoT, CAT-M1, and LoRaWAN transceivers, enabling continuous river basin and wastewater network monitoring with multi-year internal battery lifespans.
Solid-state photonic and MEMS resonance microfluidic chips offering zero-drift electrical conductivity verification, removing the requirement for chemical calibration buffer standards in ultra-pure water lines.
Expert engineering answers resolving technical queries, wholesale pricing policies, and international export logistics.
Contacting 2-electrode sensors rely on metal surfaces (titanium, 316L, or platinum) and are optimal for low to medium conductivity applications such as RO water, pure boiler feed, and clean cooling loops (0.01 to 20,000 μS/cm). Toroidal inductive sensors utilize electromagnetic coils encased in non-reactive plastics (PEEK/PVDF) and are the industry choice for fouling fluids, high salinities, and strong chemical acids/alkalis (100 μS/cm to 2,000 mS/cm) where contacted electrodes foul or polarize.
The cell constant (k = d/A) defines the geometric distance between electrodes over their surface area. A smaller cell constant (k=0.01 to 0.1 cm⁻¹) maximizes electrical resistance resolution, making it essential for ultra-pure water and condensation loops. Conversely, a higher cell constant (k=1.0 or 10.0 cm⁻¹) prevents saturation when measuring brackish water, sea water, or industrial discharge brine.
Yes. BOQU online transmitters offer universal compatibility via isolated 4-20mA analog loops with selectable span, programmable dual dry-contact alarm relays (5A/250VAC), and standard RS485 Modbus RTU communication registers. Our digital IoT sensors connect directly to SCADA host architectures, PLCs, or edge IoT gateways without an intermediate analyzer transmitter.
Conductivity exhibits severe non-linear temperature dependence in low ionic concentrations due to the auto-ionization dissociation constant of pure water. BOQU controllers feature proprietary non-linear high-purity water temperature compensation algorithms paired with fast-response PT1000 sensors, normalizing all readings accurately to 25°C reference standards.
Standard model inventories maintain immediate dispatch within 3–5 working days for orders under 50 units. Large volume OEM/ODM batch orders requiring private label printing, custom user interfaces, and non-standard thread fittings typically deliver within 15–20 business days via door-to-door air express or sea freight from Shanghai Port.
All shipments include comprehensive bilingual (English/Chinese) technical manuals, factory calibration and test certificates with traceable sensor serial numbers, electrical terminal wiring diagrams, and Modbus RTU register mapping sheets for PLC integration.
Complete your instrumentation package with our factory-calibrated online analyzers. Fully interoperable with BOQU multi-parameter bus controllers and supervisory control systems.
Certified Shanghai Brand sensor engineered for repeated CIP/SIP cycles in biopharmaceutical fermenters and high-heat process piping.
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Dissolved oxygen feedback designed for aseptic bioreactors, providing reliable aeration control through rigorous steam cycles.
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Infrared scattered-light sensor equipped with an automated mechanical wiper mechanism to eliminate optical surface fouling in sewage.
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Heavy-duty process controller with dual 4-20mA current outputs, RS485 Modbus RTU, and multi-parameter temperature compensation.
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Reagentless amperometric continuous free chlorine analyzer for municipal drinking water disinfection loops and swimming pools.
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Micro-trace wet chemistry spectrophotometric analyzer safeguarding ultra-high-pressure steam boilers against silica scale deposits.
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Continuous UV-catalytic persulfate oxidation TOC monitoring for USP/EP pharmacopeia compliant water for injection (WFI) loops.
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Fully automated environmental wet-chemistry digestion analyzer with integrated self-cleaning and self-calibration for municipal outfalls.
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