Sterilization Resilient
High-Temp pH Sensor for Fermentation
Designed for repeated CIP/SIP steam sterilization cycles in biopharma reactors, maintaining ultra-low zero-point drift.
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Featured Lineup
High-Precision Sensors & Industrial Controllers
Engineered by Shanghai BOQU Instrument to withstand aggressive media, steam sterilization, and ultra-pure water demands with direct factory pricing.
Standard PG13.5
High-Temperature S8 Connector Sensor
Features standard laboratory and pilot vessel threading with pressure-proof polymer gel electrolytes up to 6 bar.
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Integrated NTC/Pt1000
0-130℃ High-Temp Sensor with Temp
Embedded RTD provides instant automatic temperature compensation (ATC) over thermal shocks in hot chemical pipelines.
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Heavy-Duty Process
Wholesale 0-130℃ Process Sensor
Specialized alkali-resistant glass formulation optimized for continuous online monitoring in tough industrial environments.
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Dual Channel Analyzer
DCA130 Online pH & Conductivity Meter
Simultaneous dual-parameter tracking for RO pretreatment, fertigation, and cooling tower chemical dosing loops.
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Toroidal Induction
SJG-2083CS Toroidal Concentration Meter
Electrodeless inductive conductivity sensor engineered for high-salinity brines and acid/caustic CIP concentration validation.
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IoT RS485 Modbus
IOT-485 Series Digital Smart Probe
Direct Modbus RTU communication eliminates secondary transmitters, facilitating large-scale multi-point industrial IoT systems.
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Shanghai Brand Awarded
pH5806 Certified High-Temp Electrode
China's benchmark bioprocess electrode, tested up to 135℃ with precision pressurized gel chambers for zero drift.
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Price Engineering
Decoding Water Conductivity Sensor Price Dynamics in China
A transparent breakdown of cost structures, electrode cell-constant mechanics, and supply chain economies of scale separating tier-one Chinese manufacturers from intermediaries.
Cell Constant (K) & Electrode Materials
The manufacturing cost of an electrical conductivity (EC) sensor depends heavily on its designated range and metallurgy:
- K=0.01 to 0.1 (Pure Water): Constructed using electro-polished 316L stainless steel or titanium for boiler feedwater and SWAS loops ($45 – $90).
- K=1.0 (Standard Industrial): Dual-graphite or platinum black electrodes for municipal drinking and gray water applications ($25 – $55).
- K=10.0 (High Salinity): Specialized geometries for seawater desalination brine control and aggressive chemical monitoring ($60 – $110).
Toroidal (Inductive) vs. Contacting Probes
Contacting electrodes suffer from polarization resistance and foul rapidly in greasy or fibrous liquids. Toroidal (electrodeless) sensors leverage electromagnetic coils wrapped in PEEK or PVDF:
- Eliminates sensor fouling and metal erosion in high-conductivity acids or slurries.
- China factory prices range from $180 – $380, compared to Western OEM branded equivalents exceeding $1,200 – $2,500.
- Drastically cuts total cost of ownership (TCO) via zero-maintenance operational life.
Chinese Supply Chain Ecosystem Advantages
Why Chinese manufacturers deliver unmatchable price-performance ratios across international global tenders:
- Integrated Precision Machining: Shanghai-based CNC machining clusters minimize titanium and Hastelloy housing costs by 40%.
- SMT Electronics Assembly: In-house microchip packaging and high-precision calibration baths reduce scrap margins.
- Scale Advantage: Facilities like BOQU produce over 100,000 instruments annually, creating extreme economies of scale.
Technical Whitepaper Guide
Conductivity Sensor Technology & Price Benchmark Matrix
Evaluate measurement topologies, material configurations, dynamic ranges, and indicative factory direct prices.
| Sensor Topology | Cell Constant (K) | Dynamic Measurement Range | Wetted Materials | Target Applications | China OEM Factory Price (USD) |
|---|---|---|---|---|---|
| 2-Electrode Pure Water | K = 0.01 / 0.1 | 0.01 μS/cm to 20 μS/cm | 316L SS / Titanium / PTFE | Power Plant SWAS, RO Permeate, WFI | $45 – $85 |
| 2-Electrode Industrial | K = 1.0 | 1.0 μS/cm to 2,000 μS/cm | Platinum / High-Purity Graphite | Drinking Water, Cooling Towers, Hydroponics | $28 – $55 |
| 4-Electrode Wide Range | Variable Calibrated | 10 μS/cm to 200,000 μS/cm | Hastelloy C / Platinum Rings | Wastewater Inflow, Textile Effluent, Mining | $95 – $170 |
| Toroidal Inductive Sensor | Electrodeless | 100 μS/cm to 2,000,000 μS/cm | Virgin PEEK / PFA / PVDF Body | Acid/Alkali CIP, Pickling Baths, Seawater | $190 – $380 |
| IoT Modbus Digital Probe | Internal ASIC Conversion | 0.1 μS/cm to 100,000 μS/cm | PPS / Ryton / Glass Filled | Smart Cities, Agriculture Automation, DCS | $65 – $120 |
Verifiable Capability
Shanghai BOQU Instrument: In-House Manufacturing Strength
Founded in 2007, operating two proprietary factory campuses in Pudong Kangqiao and Lingang Free Trade Zone. Real capacity audited by ISO 9001, CE, SGS, and FDA frameworks.
2007
Year Founded
4,632 m²
Factory Floorspace
200+
Engineers & Staff
100,000+
Units Shipped / Year
100+
Countries Exported
2,000+
Enterprise Clients
China's First High-Temp Water Lab
We built China's first dedicated high-temperature sensor test lab. Every electrode experiences simulated 135℃ SIP steam sterilization chambers and thermal-shock cycles to ensure zero membrane failure in field bioreactors.
Full PCB & Firmware Development
From custom analog front-ends designed to measure nano-Siemens ultra-pure conductivity to robust RS485 Modbus RTU communications, we write the firmware and assemble all circuit boards in our cleanrooms.
Rigorous 48-Hour Pre-Shipment Aging
No sensor or analyzer leaves our Shanghai facility without passing a multi-point calibration verification and 48-hour continuous electrical stress test, eliminating early-stage infant mortality for overseas installations.
Global Implementation
Macro Industry Solutions & Engineered Application Scenarios
How our conductivity and comprehensive water analysis systems solve mission-critical chemical balance and compliance challenges across multiple industrial sectors.
Power Plant Steam & Water Analysis (SWAS)
Supercritical and subcritical steam boilers demand continuous cation and specific conductivity monitoring below 0.1 μS/cm. Our K=0.01 titanium probes paired with our silicate and sodium analyzers protect turbines from corrosive pitting and catastrophic thermal scale deposition.
Chemical CIP & Caustic Concentration Control
Food processing, dairy processing, and brewing facilities utilize clean-in-place (CIP) regimens. Our SJG-2083CS toroidal conductivity meter directly translates electrolytic conductivity to 0-10% NaOH or HNO₃ concentration, eliminating manual sampling errors and optimizing chemical consumption.
Desalination & Reverse Osmosis Recovery
Industrial RO filtration skids rely on differential conductivity across the membrane array to monitor permeate purity and calculate real-time salt rejection percentages. Our dual-channel controllers handle both feed salinity and permeate conductivity from one compact DIN-rail terminal.
Municipal & Industrial Wastewater Neutralization
Industrial effluent must meet stringent national discharge boundaries. Correlating continuous conductivity tracking alongside online COD, ammonia nitrogen, and pH ensures unexpected chemical dumping or salt spikes are captured prior to municipal discharge penalties.
Strategic Sourcing
Global EPC & Distributor Procurement Playbook
Key risk-mitigation metrics procurement teams must verify when buying water quality sensors directly from China factories.
1. Material Traceability & Metallurgical Certs
Always demand EN 10204 3.1 material test certificates for wetted metal elements in high-purity or SWAS applications. BOQU maintains full heat-number traceability for 316L, Titanium, and Hastelloy stocks, eliminating galvanic pitting risks.
2. Digital RS485 Protocol Interoperability
Avoid locked proprietary bus protocols. All BOQU IoT-enabled conductivity and pH sensors output standardized open-architecture Modbus RTU, ensuring frictionless compatibility with Siemens, Schneider, Honeywell, or Allen-Bradley PLCs.
3. Private Labeling & Custom Cable Engineering
Distributors benefit from customized OEM branding, laser-etched model identifiers, tailored temperature sensors (Pt100, Pt1000, NTC 10K), and double-shielded, noise-resistant cable lengths up to 100 meters directly configured at our factory.
Direct Technical Insights
Frequently Asked Questions for International Buyers
Clear, direct answers from our senior instrumentation engineers regarding lead times, customization, sensor life, and calibration standards.
Is BOQU a direct manufacturer or a trading company?
Shanghai BOQU Instrument Co., Ltd. is an authentic original equipment manufacturer established in 2007. We design, machine, assemble, calibrate, and ship all sensors and controllers across our 4,632 m² Kangqiao and Lingang factories in Shanghai, China.
What defines the factory price of a water conductivity sensor?
Pricing is governed by the electrode architecture (two-electrode vs. four-electrode vs. toroidal), wetted metal (stainless steel vs. titanium vs. platinum), cable shielding specifications, integrated temperature compensation (Pt100/Pt1000), and digital Modbus output circuitry.
How does cell constant (K) affect sensor selection?
Cell constant reflects probe geometry. K=0.01 to 0.1 is selected for pure/ultrapure water (0.01–20 μS/cm); K=1.0 covers general tap and cooling water (1–2,000 μS/cm); K=10.0 and toroidal probes are required for high-salinity brines and concentrated acids/bases up to 2,000 mS/cm.
What certifications do BOQU instruments possess?
Our company operates strictly under ISO 9001 and ISO 14001 certified management systems. Our instruments hold CE, SGS, and FDA audit credentials, and our pH5806 bioprocess series has earned the official Shanghai Brand certification.
Can your digital sensors connect directly to SCADA or cloud gateways?
Yes. Our IOT-485 digital sensors incorporate an internal microprocessor that conducts analog-to-digital signal conversion inside the probe head. They output RS485 Modbus RTU directly, eliminating the need for an external wall transmitter.
Do you provide OEM & private labeling for distributors?
Yes. We support global distributors, EPC contractors, and equipment builders with private labeling, personalized firmware registers, custom housing colors, tailored process thread fittings (NPT, BSP, Tri-Clamp), and bespoke measuring ranges.
Complete System Configurations
Integrated Water Monitoring & Industrial Analyzers
Complete your instrumentation loop with matched transmitters, automated multi-parameter panels, and trace element wet-chemistry analyzers directly from our production floor.
Bioreactor Ready
High-Temp pH Sensor for Fermentation
Designed for repeated CIP/SIP steam sterilization cycles in biopharma reactors, maintaining ultra-low zero-point drift.
View Product Specs
Standard PG13.5
High-Temperature S8 Connector Sensor
Features standard laboratory and pilot vessel threading with pressure-proof polymer gel electrolytes up to 6 bar.
View Product Specs
Integrated NTC/Pt1000
0-130℃ High-Temp Sensor with Temp
Embedded RTD provides instant automatic temperature compensation (ATC) over thermal shocks in hot chemical pipelines.
View Product Specs
Heavy-Duty Process
Wholesale 0-130℃ Process Sensor
Specialized alkali-resistant glass formulation optimized for continuous online monitoring in tough industrial environments.
View Product Specs
Integrated Station
MPG-6099Plus Multi-Parameter Panel
Comprehensive monitoring integrating conductivity, pH, turbidity, and dissolved oxygen for municipal supply grids.
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Process Controller
pHG-2081Pro Industrial Transmitter
High-reliability online controller with dual 4-20mA current loops and programmable relay alarms for dosing pumps.
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Ultra-Trace Analysis
Online Silica / Phosphate SWAS Analyzer
High-precision colorimetric trace monitoring to safeguard boilers, steam pipes, and steam turbines against scaling.
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Compliance Certified
TOC-3042 Total Organic Carbon Analyzer
Designed for pharmaceutical purified water (USP/EP compliant) and municipal drinking water organic load monitoring.
View Product SpecsRequest Direct Factory Pricing & Engineering Consultation
Connect with senior instrumentation engineers at Shanghai BOQU Instrument to evaluate process conditions, select optimal sensor cell constants, and receive competitive OEM project quotes within 24 hours.