Direct Factory Inventory
Featured High-Precision pH & Water Quality Sensors
Explore our certified electrochemistry measurement probes and digital analytical instruments built under ISO 9001 and CE directives for continuous operation.
Industrial 0-130℃ pH Sensor
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Fermentation pH Sensor
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S8 Connector pH Sensor
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pH5806 Steam-Sterilizable Probe
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DOG-208FA High Temp DO Sensor
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IOT-485-pH Digital Sensor
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ZDYG-2088-01QX Optical Sensor
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Verified Industrial Strength
China Manufacturing Excellence & Production Benchmark
Operating two modern manufacturing facilities in Kangqiao and Lingang, Shanghai, delivering high reliability to global process industries.
2007
Established in Shanghai
4,632m²
Dual-Plant Facility Area
200+
Engineers & Specialists
100,000+
Annual Instrument Output
100+
Export Destinations
Procurement Strategic Insight
Why Global Tier-1 Enterprises Source pH Sensors from China
The transformation of China's instrumentation clusters from cost-centric component assemblers to advanced electrochemical research centers.
Complete Industrial Cluster Density
Unlike regional workshops in Europe or North America that rely on lengthy offshore component lead times, Shanghai BOQU integrates raw glass blowing, noble metal deposition, and microchip soldering within a 50km radius.
- Ultra-pure platinum wire and internal reference elements sourced directly
- In-house injection molding of PVDF, PPS, and PTFE probe housings
- Reduced prototype-to-mass-manufacturing cycle by 65%
Specialized High-Temperature Formulation
The bottleneck of industrial pH sensing has always been alkaline error and hydration layer degradation under elevated steam temperatures (130°C+). BOQU invested in China's premier high-temperature sensor laboratory.
- Proprietary lithium-barium silicate glass formulation
- Pressurized gel electrolyte maintaining positive differential pressure
- Stable Ag/AgCl double ceramic junction architecture
Stringent 48-Hour Full Thermal Aging
Reliability issues in electrochemistry are eradicated through simulated factory stress testing before product shipping, eliminating early-life infant mortality in mission-critical applications.
- Continuous 48-hour burn-in and dynamic thermal cycling
- Automated 3-point calibration testing (pH 4.01, 7.00, 10.01)
- Full serialization offering complete QA material traceability
Global Standardization
International Compliance & Engineering Assurance
Global systems integrators require stringent compliance verification. BOQU hardware conforms directly to international standards for seamless worldwide deployment.
| Regulatory Framework | Certified Scope / Standard | Impact on International Procurement |
|---|---|---|
| ISO 9001:2015 & ISO 14001 | Quality & Environmental Management Systems | Guarantees audited manufacturing consistency, material traceability, and minimal batch-to-batch variation across large contracts. |
| European CE Conformity | EN 61326-1 (EMC) & EN 61010-1 (Safety) | Ensures probe and transmitter resilience against high-voltage RF interference and industrial variable frequency drives (VFDs). |
| FDA Compliance / USP Class VI | Biocompatible Wetted Materials (Glass, EPDM, PTFE) | Permits direct non-toxic integration into biopharmaceutical reactors, cleanrooms, and food & beverage processing streams. |
| SGS Audited Facility | Third-Party On-Site Capacity & Ethical Audit | Verifies legitimate plant ownership, factory floor dimensions (4,632 m²), robotic capacity, and fair labor practices. |
| Shanghai Brand Award | pH5806 High-Temperature Sensor Series | Government and industry recognized benchmark honoring top-tier engineering innovation and zero-defect quality management. |
Operational Environments
Localized Application Scenarios & Engineering Solutions
Custom-engineered electrode chemistry and mechanical housing choices designed to thrive in challenging industrial media.
Biopharma & Fermentation Reactors
Microbial cultures in antibiotic and vaccine syntheses demand precise pH stability. The sensor must survive repeated clean-in-place (CIP) and steam-in-place (SIP) cycles at 130°C without drifting or cracking.
- Recommended: pH5806 & DOG-208FA Dissolved Oxygen Probes
- Mounting: Standard PG13.5 thread into hygienic retractable ports
Power Plant Boiler SWAS Loops
Steam and Water Analysis Systems (SWAS) require monitoring ultra-pure water with high electrical resistivity where sample ionic strength is near zero, causing significant junction potential errors in generic sensors.
- Recommended: Flow-through low-conductivity pH probes with liquid KCl refill
- Benefit: Prevention of boiler tube pitting, turbine scale, and corrosion
Industrial Wastewater Neutralization
Mining effluent, electroplating rinse, and chemical manufacturing outfalls carry heavy metal salts, oily scum, and volatile organics that clog porous ceramic reference junctions within hours.
- Recommended: Solid polymer electrolyte with non-clogging open annular diaphragms
- Benefit: Cuts manual cleaning maintenance by over 70% in high TSS media
The Future of Electrochemistry
Industry Trends: The Shift to Smart Digital pH Sensing
The transition from legacy mV analog electrodes to intelligent microprocessor-embedded digital probe architectures.
On-Board Calibration Memory
Traditional sensors must be calibrated in the field at the transmitter in rain or hazardous plant conditions. Digital sensors store calibration parameters (slope, offset, glass resistance) within the internal probe EEPROM.
- Pre-calibrate in clean laboratory settings
- Rapid hot-swap field replacement in under 2 minutes
- Complete historical drift and calibration logs
RS485 Modbus RTU Signal Transmission
High-impedance analog pH cables cannot exceed 10-15 meters without significant signal degradation and sensitivity to cable bend capacitance. BOQU's IOT-485 series converts signals directly inside the probe head.
- Lossless industrial cable runs up to 1,000 meters
- Connects directly to PLC/SCADA without costly external transmitters
- High noise immunity against motor drives and pumps
Predictive Diagnostic Maintenance
Digital electrodes continually evaluate the glass membrane impedance and reference junction resistance, warning control room operators of poisoning, breakage, or dryout before analytical failure occurs.
- Early warning of ceramic junction fouling
- Real-time monitoring of glass bulb aging status
- Optimization of CIP/wash automated schedules
Frequently Asked Questions
Procurement & Technical Engineering FAQ
Direct technical responses addressing common procurement, integration, and operational questions from international buyers.
Is BOQU an original manufacturer or an export trading entity?
Shanghai Boqu Instrument Co., Ltd. is an original equipment manufacturer (OEM) founded in 2007. We operate two facilities in Kangqiao and Lingang, Shanghai, spanning 4,632 m² of floorspace with 200+ employees and complete in-house glass-blowing, CNC machining, PCB SMT mounting, and calibration laboratories.
How do BOQU sensors withstand repeated steam sterilization (SIP)?
Our fermentation sensors, such as the pH5806, use high-purity alkali-resistant glass membranes and pressurized solid polymer electrolytes with dual ceramic junctions. This prevents internal boiling, bubble void formation, and electrolyte backflow during 121°C–130°C autoclave and steam sterilization cycles.
What communication outputs are supported for automation integration?
We support standard analog (isolated 4-20 mA with programmable span), dual relay alarms, and digital protocols including RS485 Modbus RTU. Our IoT smart sensors output RS485 directly from the probe body, allowing direct multi-drop connection to DCS, SCADA, and IoT gateways without requiring separate transmitters.
Do you provide custom OEM / ODM white-label services?
Yes. Over 45% of our manufacturing volume is dedicated to private-label manufacturing for global instrumentation brands. We offer customized insertion depths (120mm, 225mm, 325mm, 425mm), customized wetted materials (Titanium, Hastelloy, PVDF, 316L SS), custom cable branding, and tailored Modbus register maps.
What quality certifications accompany each delivery?
All manufacturing conforms to ISO 9001 and ISO 14001. Products ship with individual CE conformity declarations, 3.1 material test certificates upon request, factory calibration certificates showing slope and zero-point offset, and full QA aging test signoffs.
What parameters are needed to select the correct sensor?
Please supply your medium description (water, chemical, slurry), anticipated operating pH range, temperature, pressure profile, mechanical connection (PG13.5, 3/4" NPT, flange), cable length requirements, and whether the installation environment is hazardous/explosive.
Industrial Analyzers & Controllers
Continuous Water Quality Analyzers & Multiparameter Systems
Complementing our pH sensor probes with intelligent transmitters, dual-channel controllers, and multi-parameter analysis cabinets.
DCA130 pH & EC Dual Analyzer
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MPG-6099Plus Multi-System
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pHG-2081Pro Online Transmitter
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SJG-2083CS Concentration Meter
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Residual Chlorine Analyzer
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SWAS Trace Wet Chemical Analyzer
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TOC-3042 Online TOC Analyzer
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