Fermentation pH Sensor
Designed for repeated CIP/SIP steam sterilization cycles in sterile bioreactors and pharmaceutical broths.
Featured Product Portfolio
High-Accuracy Process Sensors & Online Analyzers
Engineered for continuous, inline liquid analytics spanning micro-Siemens pure water to aggressive hyper-saline brines.
S8 Connector pH Sensor
Standardized industrial connection, high chemical resistance glass bulb, optimized for high-temperature flow chambers.
0-130℃ Process pH Sensor
Integrated Pt100/Pt1000 temperature element for automatic thermal compensation in extreme manufacturing streams.
Wide-Range 0-130℃ Sensor
Pressurized gel electrolyte prevents back-diffusion during continuous process operation up to 6 bar operating pressure.
pH5806 High-Temp Electrode
Shanghai Brand certified sensor designed for demanding bioreactor vessels, featuring polymer electrolytes.
DOG-208FA DO Sensor
Polarographic dissolved oxygen sensor stable up to 130℃ sterilization duty for fermentation line aeration control.
IOT-485 Digital Sensor
Embedded microprocessor with native RS485 Modbus RTU communication; plugs straight into edge gateways.
SJG-2083CS Toroidal Cell
Electrodeless inductive conductivity analyzer engineered for chemical leaching, CIP systems, and acid-alkali dosing.
Manufacturing Authority
Why Tier-1 Plants Source Inline Conductivity Cells from China
A technical and operational shift has occurred in industrial electrochemistry over the past decade. China’s supply chain offers significant manufacturing advantages without sacrificing precision.
Full-Chain Precision Machining
Unlike regional assemblers, our facilities in Kangqiao and Lingang control every step internally: from CNC precision machining of 316L stainless steel, titanium, and Hastelloy electrodes to proprietary glass-blowing and PEEK injection molding. This mechanical vertical integration ensures that our cell constants (k=0.01, k=0.1, k=1.0, k=10.0) maintain a certified tolerance of <±1% without batch drift.
Advanced Ceramic & PEEK Toroidal Molding
For aggressive chemicals and high-salinity brines, conventional metal electrodes suffer from electrode polarization and severe chemical fouling. Our factory has invested in specialized high-pressure PEEK and PVDF molding lines, producing non-contact electrodeless (toroidal) conductivity sensors that endure continuous immersion in hot concentrated sulfuric acid, 30% sodium hydroxide, and scouring slurries.
48-Hour Thermal Cycle Aging & NIST Tracing
Every inline conductivity sensor undergoing export shipment is subjected to a strict 48-hour thermal shock and pressure testing regime in our specialized high-temperature water laboratory. Calibration routines are validated against certified standard reference solutions traced directly to national metrology standards, guaranteeing plug-and-play installation for global plant engineers.
ISO 9001 Certified System
ISO 14001 Environmental Standard
CE European Conformity
SGS Audited Workshop
FDA Registered Wet Materials
Industry White Paper Insights
Emerging Technological Trends in Inline Conductivity Analysis
The industrial instrumentation landscape is transitioning rapidly from basic analog cells to decentralized IoT intelligent edge sensors.
1. Direct Digital Protocol Transition
Traditional millivolt and microampere analog signals running through hundreds of meters of factory conduit are susceptible to electromagnetic interference (EMI) from high-voltage variable frequency drives (VFDs) and motors. The market is shifting to direct RS485 Modbus RTU, Profibus DP, and Industrial Ethernet outputs. Integrated digital microchips within the sensor head convert raw conductance directly at the measuring point, preserving data integrity.
2. Toroidal (Inductive) Superiority
Process plants are steadily replacing conventional contacting electrodes with inductive toroidal sensors for conductivity ranges above 2,000 µS/cm. By inducing an alternating magnetic current inside a closed liquid loop, toroidal cells eliminate physical metal-to-liquid contact, eradicating electrode polarization, fouling, coating, and corrosion in applications like CIP caustic verification and brine concentration.
3. Automated Temperature Algorithms
Conductivity is profoundly dependent on fluid temperature, fluctuating by approximately 2% to 3% per degree Celsius. Next-generation inline conductivity transmitters feature multi-point matrix non-linear temperature compensation curves (such as pure water non-linear matrix, acid-base concentration algorithms, and USP/EP compliance curves), enabling exact 25°C normalized reporting under turbulent thermodynamic plant swings.
Procurement Reference
Wholesale Inline Conductivity Sensor Matrix & Pricelist Guide
Estimated industrial tier-1 volume export pricing. Final FOB/CIF quotations depend on sensor cell constant, wetted body alloy, cable run, and communication bus.
| Model Category | Cell Constant (k) | Nominal Measuring Range | Wetted Materials | Typical Applications | Volume B2B FOB (USD) |
|---|---|---|---|---|---|
| Ultra-Pure Water Cell | k = 0.01 / 0.1 cm⁻¹ | 0.01 – 20.00 µS/cm | 316L SS / Titanium / PTFE | Pharma WFI, Power Condensate, RO Permeate | $110 – $190 |
| Industrial Process Cell | k = 1.0 cm⁻¹ | 1.0 – 2,000 µS/cm | 316L Stainless Steel / POM | Cooling Towers, Surface Water, Municipal Water | $65 – $120 |
| High-Range Contacting | k = 10.0 cm⁻¹ | 10 – 20,000 µS/cm | Platinum / Graphite / PVDF | Industrial Wastewater, Desalination Feed | $95 – $160 |
| Toroidal Inductive Sensor | Electrodeless | 100 µS/cm – 2,000 mS/cm | Virgin PEEK / Natural PVDF | CIP Caustic, Acid Regeneration, Brines | $260 – $480 |
| High-Temp Fermentation Cell | k = 0.1 / 1.0 cm⁻¹ | 0.1 µS/cm – 100 mS/cm | Electropolished 316L / PEEK | Steam Sterilization (SIP 130℃), Bioreactors | $180 – $320 |
| Direct Modbus IoT Sensor | k = 0.01 – 10.0 cm⁻¹ | Full Digital Scaling | Ryton (PPS) / 316L Alloy | Smart Agriculture, Edge SCADA, Modular Skids | $130 – $220 |
*MOQ discounts apply starting at 10+ units. OEM custom cable markings, threaded couplings (NPT/G), and sanitary Tri-Clamp flanges available on request.
Global Application Engineering
Engineered Turnkey Solutions for Macro Industries
Explore how our inline conductivity technology directly drives efficiency, ensures regulatory compliance, and protects capital assets across diverse manufacturing sectors.
Thermal & Nuclear Power Plants (SWAS)
Boiler feed water purity is critical to stop steam turbine blade scaling and tube corrosion. Our high-precision k=0.01 cm⁻¹ titanium flow cells, coupled with cation-exchange columns, accurately monitor specific conductivity, cation conductivity, and degassed cation conductivity down to <0.055 µS/cm, satisfying strict EPRI and VGB water-steam cycle guidelines.
Pharmaceutical & Bioprocess Facilities
Pharmaceutical Water-for-Injection (WFI) and Purified Water (PW) loops mandate continuous inline compliance with USP <645> and EP specifications without temperature compensation. BOQU delivers non-compensated raw electrolytic conductivity alongside precise temperature outputs, housed in hygienic Tri-Clamp electropolished 316L fittings rated for repeated 130°C clean-in-place cycles.
Chemical & Semiconductor Cleanrooms
In wet chemical etching, electroplating baths, and semiconductor ultra-pure rinse stations, contacting sensors fail quickly. Our non-contact inductive toroidal sensors calculate direct percentage concentrations of aggressive solutions—including 0-10% H₂SO₄, 0-15% HCl, and 0-20% NaOH—enabling automated, chemical dosing without maintenance shutdowns.
Strategic Sourcing Framework
Addressing Global B2B Procurement Specifications
International system integrators, EPC engineering contractors, and OEM brands require rigorous technical conformance when qualifying an Asian instrumentation manufacturer.
Custom Mechanical Form Factors
Adapting sensor wetted bodies to 3/4" NPT threads, 1" G threadings, PG13.5 connections, and ASME BPE compliant sanitary Tri-Clamp flanges to fit existing piping without field redesign.
Firmware & Protocol Customization
Private-labeled RS485 Modbus registers, selectable baud rates, customized 4-20mA span assignments, and customized OLED controller firmware with multiple language support for your region.
Hazardous Area Explosion Proofing
Optional Ex d IIC T6 Gb and intrinsic safety certifications for deployment inside flammable petrochemical refining, off-shore oil exploration, and hazardous gas handling zones.
Traceable Calibration & MTRs
Comprehensive delivery documentation: Material Test Reports (EN 10204 3.1), surface roughness inspection records, calibration benchmark certificates, and CE conformity files included with every consignment.
Technical Clarifications
Frequently Asked Questions by Industrial Sourcing Teams
Clear, practical guidance compiled by our senior chemical engineers and export managers.
How do I determine the appropriate conductivity cell constant (k) for my application?
The cell constant (k = d/A) relates the geometry of the electrode plates to the measured electrical path. For ultra-pure fluids (like boiler feedwater and pharmaceutical WFI) where electrical resistance is high, select k = 0.01 or k = 0.1 cm⁻¹ to achieve clear measurement resolution. For drinking water, surface water, and secondary effluent, k = 1.0 cm⁻¹ covers the standard 10 to 2,000 µS/cm range. For wastewater and brackish media, use k = 10.0 cm⁻¹. If your process liquid exceeds 20,000 µS/cm or contains coatings/slurries, use an electrodeless toroidal sensor.
What are the key failure modes of contacting conductivity cells versus toroidal cells?
Contacting cells can fail due to three primary causes: polarization resistance (voltage build-up on the metal plates in high-ionic streams), surface coating (oils, biological films, or mineral scale insulating the metal surfaces), and galvanic corrosion. Toroidal (inductive) cells have no exposed metal plates and are protected inside solid PEEK or PVDF bodies, eliminating polarization and corrosion entirely. As long as the central donut hole remains clear of physical clogging, toroidal cells deliver drift-free measurement with minimal maintenance.
How does temperature compensation work during extreme thermal shifts?
Electrolytic conductivity changes significantly with fluid temperature due to changes in ionic mobility, shifting around 1.8% to 2.5% per °C. Standard industrial transmitters use linear compensation based on a constant temperature coefficient (α). However, in high-purity water, ionization physics behaves non-linearly. BOQU controllers feature programmable mathematical matrices (linear, non-linear pure water, and acid/base percentage lookup curves) paired with internal Pt1000 RTD elements to ensure accurate normalization to 25°C.
What are the minimum order quantities (MOQ) and lead times for OEM private labeling?
Standard stocked catalog configurations (such as standard k=1.0 cells and digital RS485 sensors) carry no minimum order quantity and ship within 3 to 5 business days. For customized OEM production—including proprietary logo silk-screening, custom cable jacket materials, special insertion stem lengths, and unique Modbus slave addresses—the typical MOQ is 10 to 50 pieces, with production cycle lead times averaging 2 to 3 weeks after technical drawing approval.
Factory Direct Inventory
Online Analyzers & Multi-Parameter Transmitters
Combine high-stability inline sensors with wall-mount, panel-mount, or DIN-rail analytical controllers.
Sterilizable pH Probe
High-temperature electrolyte matrix maintains stable measurement through intense biopharma steam cycles.
S8 Industrial pH Sensor
Fast-thread S8 connector head provides quick disconnect during routine plant calibration routines.
Wide Range 0-130℃ pH
Factory-integrated temperature element prevents reference drift under fluctuating industrial thermal loads.
Heavy-Duty Process Sensor
Dual-junction diaphragm minimizes poisoning risks in active chemical reactors and stripping columns.
DCA130 Dual Channel
Monitors pH and conductivity simultaneously in a single controller. Ideal for compact skid systems.
MPG-6099Plus System
Integrated water monitoring panel tracking conductivity, pH, free chlorine, and turbidity on an LCD interface.
pHG-2081Pro Controller
Standard process transmitter equipped with dual isolated 4-20mA loops, Modbus RTU, and relay setpoints.
TOC-3042 TOC Analyzer
Conductivity-differential oxidation analysis for continuous total organic carbon monitoring in pure water lines.
Request Factory Direct Pricing & Custom Sizing
Need help matching the right cell constant (k), wetted body materials, and signal communication for your plant pipeline? Connect directly with BOQU's senior application engineers in Shanghai for technical recommendations and customized wholesale volume quotations.
Direct Line: +86-18916729106
Technical Email: [email protected]
Facility: Pudong District, Shanghai, China