Factory-Engineered Industrial Sensors & Probes
Explore our top-tier high-temperature, hygienic, and digital water quality instrumentation built in our Shanghai facilities for aggressive media and sterile environments.
Pharma Fermentation High-Temp Sensor
Designed for repeated steam-in-place sterilization up to 130°C in pharmaceutical bioreactors and enzymatic fermentation tanks.
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High Temp (0-130℃) Integrated Sensor
Precision pH measurement coupled with integrated RTD temperature compensation for severe thermal process environments.
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High-Temperature S8 Connector Probe
Standardized PG13.5 threading with IP68 waterproof S8 plug connector for fast replacement in modular industrial processing plants.
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Industrial 0-130℃ Process Probe
Solid polymer electrolyte barrier resisting chemical poisoning and reference electrode contamination under continuous heat.
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pH5806 Shanghai Brand pH Sensor
Accredited Shanghai Brand certified electrode offering ultra-low zero-point drift during sustained SIP steam sterilization cycles.
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DOG-208FA High Temp DO Sensor
Polarographic dissolved oxygen sensor specifically calibrated for sanitary bioreactors requiring strict dissolved gas regulation.
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DCA130 Dual Channel pH & EC Analyzer
Simultaneous real-time monitoring of pH and electrical conductivity on a dual-channel controller with dual isolated 4-20mA loops.
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SJG-2083CS Inductive Concentration Meter
Toroidal electrodeless sensor specialized for in-line acid and alkali percentage tracking in Clean-in-Place (CIP) chemical regeneration.
View Product SpecificationsPrinciples of Toroidal Inductive Conductivity Measurement
Overcoming the electrochemical limitations of contacting electrode cells in high-salinity, fouling, and chemically corrosive industrial aqueous environments.
Dual-Toroid Faraday Induction
Unlike standard contacting sensors that expose metal pins directly to process fluids, an inductive (toroidal) conductivity probe operates via two hermetically encapsulated wire-wound toroids. The primary excitation coil receives an alternating magnetic field that induces an alternating ionic current inside the conductive process loop.
- Completely electrodeless electromagnetic coupling
- Eliminates electrode polarization impedance
- Secondary pick-up toroid senses induced loop current
Impervious Thermoplastic Encapsulation
The sensitive induction coils are permanently molded within virgin Polypropylene (PP), Polyvinylidene Fluoride (PVDF), or Polyetheretherketone (PEEK). This continuous non-metallic outer shell delivers absolute protection against aggressive chemical attack and mineral deposition.
- Resistant to concentrated H₂SO₄, HNO₃, and NaOH
- Immune to heavy oil, biological sludge, and coatings
- High mechanical resistance to hydraulic pressure shock
Dynamic Cell Constant Stability
Traditional 2-electrode and 4-electrode conductivity sensors suffer from scaling deposits that alter the physical cell constant (K-factor), requiring weekly recalibration. Inductive probes maintain an ultra-wide measurement window from 100 µS/cm to 2,000 mS/cm without physical electrode degradation or recalibration interruptions.
- Extended maintenance cycles up to 12 months
- Direct mass percentage output for acids and caustics
- Sub-millisecond transient response to concentration shifts
Wholesale Inductive Conductivity Probe Pricelist & Tiering
Transparent tiered pricing structures for distributors, EPC engineering contractors, and OEM machine builders purchasing factory-direct from our Shanghai hub.
| Probe Classification | Material Core | Measuring Range | Sample Tier (1-9 pcs) | Distributor Tier (10-49 pcs) | Wholesale Tier (50+ pcs) | Typical Applications |
|---|---|---|---|---|---|---|
| General Purpose Toroidal Series IND-GP |
Reinforced Polypropylene (PP) | 200 µS/cm – 1,000 mS/cm | $320 – $410 / pc | $220 – $280 / pc | $145 – $190 / pc | Wastewater aeration, seawater intake, cooling towers |
| Chemical / Acid Resistant Series IND-CR |
PVDF / PTFE Lining | 500 µS/cm – 2,000 mS/cm | $450 – $560 / pc | $310 – $380 / pc | $210 – $275 / pc | Chlor-alkali plants, battery acid, chemical dosing lines |
| Sanitary CIP / SIP Toroidal Series IND-BIO |
Virgin PEEK (FDA USP VI) | 100 µS/cm – 1,500 mS/cm | $580 – $720 / pc | $390 – $490 / pc | $280 – $360 / pc | Dairy CIP, pharmaceutical media separation, food wash |
| High-Temperature Steam Toroid Series IND-HT |
Cross-linked PEEK / Hastelloy C | 100 µS/cm – 2,000 mS/cm | $750 – $920 / pc | $520 – $640 / pc | $380 – $480 / pc | Thermal process reactors, boiler blowdown, steam extraction |
| Direct Modbus Smart Toroidal Series IND-IOT |
Integrated Electronics in PEEK | 50 µS/cm – 2,000 mS/cm | $490 – $620 / pc | $340 – $430 / pc | $230 – $310 / pc | Remote IIoT networks, telemetry skids, PLC edge control |
OEM Private Labeling & Customization
For international analyzer brands and instrumentation suppliers, we provide end-to-end white-label and ODM packaging. Customize probe stem lengths (120mm to 350mm), process connections (2" Tri-Clamp, NPT thread, ANSI/DIN flanges), customized cable jacket materials (PTFE/Silicone), and firmware branding.
Global Batch Logistics & Lead Time Assurance
With an active buffer stock of over 10,000 toroid coil sets and automated winding machines, standard probe configurations dispatch within 5–7 business days. We partner directly with DHL, FedEx Express, and air freight forwarders, ensuring DDP/CIF transit times under 5 days to North America, Europe, and Southeast Asia.
Total Cost of Ownership (TCO) Economics
While an inductive probe has a modestly higher initial purchase cost compared to a traditional 2-pin contacting cell, it slashes the 3-year TCO by over 68%. The total absence of electrode burn-out, chemical erosion, and continuous manual cleaning interventions translates into thousands of dollars in saved downtime.
China Factory 4.0: Supply Chain Resilience & Quality Scalability
From robotic toroidal winding to high-temperature thermal cycling ovens in Shanghai, see how our integrated manufacturing ensures zero-defect delivery.
Automated Toroidal Winding & Molding
Toroid symmetry determines measurement zero-point drift. BOQU utilizes computerized multi-axis toroidal coil winding equipment to maintain exact coil turn ratios and magnetic core orientation. Sub-millimeter precision thermoplastic injection over-molding eliminates all internal micro-voids, preventing process gas permeability even under 2.0 MPa pressure.
China's First Dedicated High-Temp Lab
Our dedicated high-temperature sensor laboratory validates every sensor model through extreme hydrothermal stress testing. Sensors undergo continuous 130°C autoclave cycling and accelerated chemical immersion in boiling nitric acid and sodium hydroxide to guarantee absolute structural and metrological stability before field deployment.
48-Hour Continuous Aging Calibration
Every single inductive probe and digital analyzer integrated circuit is subjected to a mandatory 48-hour thermal aging run. Post-burn-in calibration is performed on automated NIST-traceable KCl conductivity standards. Complete individual calibration certificates are archived and supplied with each commercial consignment.
Macro Industry Solutions: Engineered for Unforgiving Media
From concentrated mineral acids to hygienic biopharma cleanrooms, review how toroidal inductive probes solve process challenges worldwide.
Chemical & Petrochemical Synthesis
In wet chemical etching, fertilizer synthesis, and chlor-alkali production, contacting electrodes fail in hours due to galvanic corrosion. Toroidal probes precisely calculate acid/alkali strength (0-10% H₂SO₄, 0-15% HCl, 0-30% NaOH) by mapping non-linear conductivity curves against high-resolution internal temperature tables.
Food, Beverage & Dairy Clean-In-Place (CIP)
Automated CIP operations require instantaneous differentiation between rinse water, caustic wash, and acid sanitizer. With FDA-compliant USP Class VI virgin PEEK inductive probes, beverage facilities detect phase transitions in fractions of a second, drastically cutting chemical wastage and preventing rinse carry-over into milk and beer lines.
Seawater Desalination & Brine Recovery
Hypersaline reverse osmosis reject brine rapidly fouls standard electrodes with gypsum and carbonate scaling. Toroidal electrodeless sensors feature large bore openings (through-hole diameters up to 25mm) that allow high-velocity flow without particulate trapping, ensuring accurate salinity tracking in continuous Zero Liquid Discharge (ZLD) plants.
Mining Leach Slurries & Tailings Monitoring
Abrasive mineral tailings in hydrometallurgical gold, copper, and lithium extraction grind contacting electrode coatings away within weeks. PEEK toroidal bodies withstand severe physical slurry erosion and maintain accurate free-acid tracking for optimized solvent extraction and electro-winning (SX/EW).
Global Enterprise Procurement Requirements & Interface Standards
Harmonizing hardware connectivity, telemetry outputs, and installation mechanics for turnkey DCS/SCADA process automation.
Native RS485 Modbus RTU & Dual 4-20mA
Our smart inductive sensors deliver uncorrupted digital communication over distances exceeding 1,000 meters directly to Siemens, ABB, Schneider, or Rockwell PLCs. Sensor microcontrollers calculate both raw conductivity and temperature-compensated values internally, removing mathematical overhead from local automation controllers.
Mechanical Mounting Adaptability
We supply modular mounting solutions configured for pipeline or open-basin monitoring: immersion brackets for effluent pits, 3/4" and 1.5" MNPT screw threads for flow-through tees, 2" Tri-Clamp hygienic fittings for sanitary biopharma ferrules, and retractable ball-valve assemblies allowing probe servicing without system depressurization.
Hazardous Area Safety Compliance
Engineered to align with ATEX / IECEx Zone 1 and Zone 2 intrinsically safe environments. With non-sparking inductive coils encapsulated in solid, non-conductive dielectric engineering polymers, BOQU toroidal probes are the safest choice for explosive alcohol fermentation, refinery wash water, and volatile petrochemical wastewater.
Technological Roadmap: The Next Generation of Inductive Analytics
Integrating AI-driven predictive health indicators, ultra-low power wireless architectures, and advanced nano-composite polymers.
Edge-AI Predictive Fouling Algorithms
By constantly analyzing the phase shift angle between excitation current and pickup coil response, next-generation BOQU smart probes detect the onset of boundary-layer sludge buildup before measurement accuracy degrades. Operators receive predictive maintenance alerts weeks ahead of any failure.
Ultra-Low Power LoRaWAN & NB-IoT Probes
Custom micro-toroid magnetic cores operating at high excitation frequencies slash power consumption by 85%. This allows direct integration with solar-powered remote telemetry units (RTUs) for continuous watershed conductivity monitoring and unattended ocean estuary salinity tracking.
Graphene-Enhanced Fluoropolymer Housings
Partnering with Shanghai advanced material research institutes, BOQU is developing graphene-doped PVDF polymers that elevate thermal conductivity by 300%. This enables instantaneous RTD temperature compensation while providing zero-stick surfaces that prevent grease and bio-slime adhesion.
International Compliance, Traceability & Localized Support
Rigorous multi-standard certification protocols supporting frictionless importing, plant audits, and operational assurance worldwide.
ISO 9001 & ISO 14001 Certified Quality
Our dual factories operate under ISO 9001 quality management and ISO 14001 environmental frameworks. All materials are fully serialized with barcoded component genealogy, ensuring rapid batch tracing and complete metallurgical/polymer mill test reports for FDA and GMP audits.
CE, RoHS & FDA Food-Grade Approvals
All BOQU products carry European CE conformity, RoHS compliance for restricted hazardous substances, and FDA food-contact documentation for sanitary sanitary polymer surfaces. Probes entering sanitary dairy, food, and beverage processes meet 3-A sanitary guidelines and USP Class VI standards.
Global Field Engineering & RMA Hubs
Supported by our Shanghai headquarters and our authorized distribution network across Asia, the Middle East, Europe, and the Americas, our clients enjoy fast technical support. Inquiries receive responses from accredited application engineers within 12 hours, backed by a 1-year direct replacement warranty on all probes.
Frequently Asked Technical & Sourcing Questions
Clear, engineering-level guidance for instrumentation technicians, plant managers, and procurement specialists.
What is the minimum conductivity threshold required for an inductive probe?
Inductive (toroidal) conductivity probes rely on an induced magnetic current loop within the fluid. For this physical loop to generate a measurable secondary signal, the liquid must possess a sufficient ion concentration. As a general engineering guideline, inductive sensors are designed for media with conductivities above 50 µS/cm to 100 µS/cm. For ultra-pure water (UPW), boiler condensate, or reverse osmosis permeate (< 20 µS/cm), contacting 2-electrode conductivity cells with cell constants of K=0.01 or K=0.1 cm⁻¹ remain the recommended analytical choice.
How does pipe wall proximity affect toroidal sensor calibration?
Because the magnetic field expands outside the physical toroid donut, placing an inductive probe too close to a conductive metallic pipe wall can distort the measurement loop. BOQU recommends maintaining a minimum clearance of at least 30mm (1.2 inches) between the outer probe body and the pipe wall. When installed in non-metallic (PVC, PVDF, PP) pipes or tight flow cells, an in-situ zero/span calibration or installation factor correction (programmed into the transmitter) compensates completely for the pipe geometry effect.
Can inductive probes directly display acid and caustic concentration percentages?
Yes. When paired with our SJG-2083CS or intelligent digital transmitters, the analyzer contains pre-programmed concentration tables for commercial chemical solutions including Sulfuric Acid (H₂SO₄: 0–99.5%), Hydrochloric Acid (HCl: 0–18%), Nitric Acid (HNO₃: 0–30%), and Sodium Hydroxide (NaOH: 0–15% and 25–50%). The instrument calculates and directly displays the solution mass concentration percentage (%) alongside temperature and raw conductivity.
What are the lead times and minimum order quantities (MOQ) for wholesale buyers?
Our standard MOQ is just 1 unit for evaluation samples, allowing engineering teams to conduct thorough pilot testing. For wholesale and distributor orders (10–100+ units), typical lead times are 5 to 10 working days from order confirmation. Customized OEM configurations requiring private-label mold stamping or custom flange machining typically dispatch in 15 to 20 working days.
What material should I select: Polypropylene (PP), PVDF, or PEEK?
Material selection is determined by chemical composition and temperature:
• Polypropylene (PP): Cost-effective; ideal for wastewater neutralization, municipal water, and light chemical dosing up to 80°C.
• PVDF (Kynar): Superior chemical resistance to strong oxidizers, halogens, sodium hypochlorite, and concentrated acids up to 100°C.
• Virgin PEEK: The gold standard for pharmaceutical, food, dairy CIP, and abrasive mining slurries. Withstands temperatures up to 130°C–150°C and repeated steam sterilization while meeting FDA and USP Class VI requirements.
How does temperature compensation work in high-salinity hot solutions?
Conductivity in aqueous solutions varies drastically with temperature (typically 1.5% to 3.0% per degree Celsius). BOQU inductive probes embed an ultra-fast response Pt1000 or NTC 10k thermistor directly below the polymer outer jacket. Transmitters utilize dynamic quadratic algorithms or non-linear matrix compensation to normalize values to a 25°C reference point, preventing false dosing spikes during temperature surges.
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View Product SpecificationsAccelerate Your Project with Direct Factory Sourcing
Connect directly with our Shanghai instrumentation engineers to receive an itemized quotation, request customized 3D CAD step files, or arrange wholesale OEM sample shipments.