Is BOQU a manufacturer or a trading company?

BOQU is a manufacturer. Founded in 2007, Shanghai Boqu Instrument Co., Ltd. designs, produces and tests its sensors and analyzers in two Shanghai facilities (Kangqiao and Lingang) with 4,632 m² of floorspace, 200+ employees and an annual output of more than 100,000 instruments.

Which certifications do BOQU water quality instruments hold?

Production is managed under ISO 9001 and ISO 14001 systems, and products carry CE, SGS and FDA related certifications. The pH5806 high temperature pH sensor has also been awarded the Shanghai Brand certification.

What signal outputs and communication protocols are available?

Depending on the model, BOQU online analyzers provide 4-20 mA analog outputs, relay alarm contacts and RS485 Modbus RTU communication. IoT digital sensors output RS485 Modbus RTU directly, so they can connect to PLC, DCS, SCADA or cloud gateways without a separate transmitter.

Can BOQU sensors be used in high-temperature fermentation and steam sterilization?

Yes. BOQU operates a dedicated high-temperature water quality sensor laboratory, and its high-temperature pH and DO sensors such as the pH5806 and DOG-208FA are designed for bioreactors, fermenters and hot process lines that undergo repeated steam sterilization.

Do you offer OEM and ODM services?

Yes. BOQU supports OEM and ODM projects including private labeling, custom housings, cable lengths, measuring ranges, firmware and communication protocols, backed by an in-house R&D team.

What information should I provide to get the right analyzer recommendation?

Please share the parameters to measure, expected range, water type, process temperature and pressure, installation method (immersion, flow-through or pipeline), required output signal, power supply and any local compliance standard. BOQU engineers will then recommend a suitable configuration.

China Water Ph Controller Wholesaler & Factories

Direct Factory Precision Hardware

Flagship Water pH Controllers & Electrodes for Global Wholesale

Engineered under ISO 9001 quality frameworks in Shanghai, calibrated across a 0–14 pH spectrum with 48-hour thermal aging.

China High Temperature 0-130 pH Sensor With Temperature

High Temperature (0-130℃) pH Sensor With Built-in Temperature

Designed for severe thermal conditions with integrated Pt100/Pt1000 ATC, polymer gel electrolyte, and steam sterilization resistance.

Explore Specifications

China High-temperature pH Sensor Used Pharmaceutical Fermentation

Pharmaceutical Fermentation High-Temp pH Sensor

Precision bioprocess electrode with pressurized reference junction preventing protein poisoning in bioreactors and fermenters.

Explore Specifications

Wholesale High-temperature S8 Connector pH Sensor

High-Temperature S8 Connector Process pH Sensor

Standardized PG13.5 thread and S8/VP plug compatible with international inline housings, immersion sleeves, and flow assemblies.

Explore Specifications

Wholesale High Temperature 0-130 pH Sensor Supplier Factories

Heavy-Duty (0-130℃) Industrial Inline pH Sensor

High zero-potential stability, double ceramic diaphragm barrier, and anti-fouling glass formulation for chemical synthesis plants.

Explore Specifications

pH5806 High Temperature Shanghai Brand pH Sensor

Certified award-winning sensor built to endure repeat CIP/SIP cycles, autoclaving up to 135°C, and rapid thermal cycling without drifting.

Explore Specifications

pHG-2081Pro Industrial Digital Online pH Controller

Microprocessor-driven controller featuring dual isolated 4-20mA, RS485 Modbus-RTU, dual SPDT relays, and automatic wash cleaning timers.

Explore Specifications

IOT-485-pH Digital Smart pH/ORP Sensor Node

Embedded ADC electronics with direct Modbus protocol output, eliminating analog signal attenuation over 500m industrial cable runs.

Explore Specifications

DCA130 Online pH and EC Dual Channel Analyzer

DCA130 Online Dual-Channel pH & Conductivity Analyzer

Simultaneous real-time monitoring of pH and electrical conductivity in a compact panel cutout for reverse osmosis and agricultural dosing.

Explore Specifications

Global Market Analysis

The Global Landscape of Industrial pH Controllers & Process Analytical Technology (PAT)

How the global convergence of strict wastewater environmental compliance, precision bioprocessing, and Industry 4.0 digitizes electrochemistry.

Stringent Regulatory & Zero Liquid Discharge (ZLD)

Global environmental enforcement across the EU (Industrial Emissions Directive), USA (NPDES Clean Water Act), and Southeast Asia requires plants to eliminate unmonitored effluent excursions. Modern pH controllers serve as automated compliance guardians, operating continuous neutralization tanks with automated reagent metering.

Effluent Compliance Heavy Metal Precipitation ZLD Systems

IoT Digitalization & Decentralized Edge Processing

The global process automation market has outgrown analog millivolt transmission lines prone to electromagnetic interference (EMI) from variable frequency drives. Factory installations demand intelligent digital nodes outputting RS485 Modbus-RTU, Ethernet IP, and wireless LoRaWAN directly to supervisory SCADA platforms.

Modbus-RTU Distributed DCS Noise Immunity

Advanced Chemical Engineering & High-TCO Optimization

Downtime in continuous biopharmaceutical, chemical, and metal etching plants cost tens of thousands of dollars per hour. Industrial asset managers prioritize electrochemistry lifetime, low-drift solid electrolyte polymers, and quick-disconnect S8/VP6 connectors to dramatically slash Total Cost of Ownership (TCO).

Bioprocess Uptime Low Maintenance Solid Gel Polymer

2007

Founded in Shanghai

4,632 m²

Dual Manufacturing Plant

200+

Engineers & Technicians

100,000+

Annual Instrument Output

100+

Export Destinations

2,000+

Global Enterprise Clients

Technical Architecture Reference

Engineering Specification Matrix: Industrial pH Controllers & Electrodes

Compare electrochemistry topologies, reference junctions, transmitter architectures, and integration interfaces across industrial operations.

Functional Parameter	Standard Effluent Analyzer (e.g. pHG-2081Pro)	High-Temperature Fermentation (e.g. pH5806 Series)	Direct IoT Digital Smart Sensor (e.g. IOT-485-pH)	Trace SWAS Power Plant Analyzer
Measuring Principle	Potentiometric glass electrode with Ag/AgCl reference	Pressurized polymer gel reference with Ag/AgCl diaphragm	Integrated electrochemistry cell with built-in 24-bit ADC MCU	Flow-through low-conductivity glass cell with liquid junction
Operating Range	0.00 – 14.00 pH; -1999 – +1999 mV (ORP)	0.00 – 14.00 pH (Steam sterilizable up to 135℃)	0.00 – 14.00 pH; 0 – 80℃ (ambient liquid)	2.00 – 12.00 pH (Conductivity < 2 μS/cm)
Measurement Accuracy	±0.01 pH; ±1 mV; ±0.3℃	±0.02 pH under dynamic thermal cycles	±0.02 pH (internal factory slope calibration stored)	±0.01 pH with pure-water temperature compensation
Temperature Compensation	Pt1000 / Pt100 / NTC30K automatic (-10.0 to 130.0℃)	Integrated Pt100/Pt1000 inside glass stem	Digital sensor internal thermistor with polynomial correction	High-precision pure-water non-linear dissociation curve
Output Signals	Dual 4-20mA (galvanically isolated), RS485 Modbus, Relays	Raw mV direct / VP6 multi-pole high-temp shielded cable	RS485 Modbus-RTU direct to PLC/RTU without transmitter	4-20mA isolated + RS485 Modbus + high/low alarms
Diaphragm / Junction	Dual porous ceramic or PTFE annular ring	Open hole or pressurized ceramic barrier against sulfide	Porous PTFE diffusion ring with anti-fouling geometry	Ground glass sleeve or capillary free-flowing electrolyte
Typical Applications	Municipal WWTP, chemical plating, acid neutralization	Pharma bioreactors, recombinant yeast, antibiotic fermentation	Smart aquaculture, vertical hydroponics, remote telemetry	Boiler feedwater, turbine condensate, demineralizer plants

Multi-Sector Implementations

Localized Industrial Deployment Architectures Across 7 Core Sectors

How specialized pH controllers resolve real-world chemical kinetics, severe process fouling, and extreme thermal dynamics.

Heavy Industry & Municipal

1. Wastewater Neutralization & Heavy Metal Precipitation

Continuous industrial wastewater equalization tanks present steep, highly non-linear titration curves. A slight overshoot of caustic soda (NaOH) or sulfuric acid (H2SO4) swings process chemistry across the pH spectrum, causing heavy metal discharge violations or catastrophic reagent waste.

PID Pulsed Relay Control: Our pHG-2081Pro triggers variable speed dosing pumps via pulse-frequency relays, eliminating chemical hunting.
Poison-Resistant Junctions: Solid polymer electrolyte prevents heavy metals (Cr⁶⁺, Ni²⁺, Cu²⁺) and suspended solids from clogging the ceramic reference.

Recommended Engineering Setup:

Transmitter: pHG-2081Pro Dual 4-20mA Wall-Mounted Controller
Sensor: Heavy-Duty Flat-Glass Submersible pH Electrode with Ultrasonic Self-Cleaning Adapter
Output: Direct RS485 Modbus-RTU connection to Siemens S7-1500 PLC

Field-Tested in Vietnam 200 m³/d Chemical Parks

Life Sciences & Biotech

2. Biopharmaceutical Fermentation & Enzyme Synthesis

Recombinant protein folding, antibiotic broths, and amino acid synthesis require tight pH tolerances within ±0.05 pH units. Sterilization-In-Place (SIP) at 130°C and automated Clean-In-Place (CIP) using hot alkaline solutions dissolve standard glass envelopes and deplete standard gel references.

Pre-Pressurized Gel Matrix: BOQU pH5806 electrodes maintain positive internal gauge pressure, preventing process broth from invading the reference element.
Zero-Silver Diaphragm Technology: Protects fermentation cultures from ionic silver poisoning common with inferior reference chemistries.

Recommended Engineering Setup:

Sensor: pH5806 Steam-Sterilizable Glass Electrode (Shanghai Brand)
Connector: Standard S8 / VP6 connector with autoclave-safe high-temp cabling
Certification: FDA food contact compliance and 3A hygienic compliance

Adopted across Indian & Russian Biopharma Facilities

Thermal & Nuclear Energy

3. Power Utility SWAS: Boiler Feedwater & Condensate Demineralization

Ultra-pure water in supercritical boilers and steam turbine loops possesses extremely low ionic strength (<0.1 μS/cm). Conventional pH electrodes suffer from excessive streaming potential variations, unstable reference liquid junction potentials, and carbon dioxide absorption contamination.

Shielded Stainless Flow Chambers: High-integrity 316L flow cells maintain constant velocity and shield against external electrostatic fields.
Ammonia/Amine Non-Linear Compensation: Dedicated microcode algorithm corrects pure water dissociation equilibrium curves dynamically.

Recommended Engineering Setup:

System: BOQU Integrated SWAS Skid with sample conditioning cooler
Analyzers: pHG-2081Pro paired with Silicate, Sodium, and Hydrazine analyzers
Accuracy: Reliable ±0.02 pH in high-purity water down to 0.055 μS/cm

Standardized in Waste-to-Energy Power Projects

Drinking Water Plants

Disinfection efficacy relies completely on pH. Hypochlorous acid (HOCl) dissociates into weaker OCl⁻ above pH 7.5. Online controllers continuously tune coagulant dosing and chlorination loops.

Disinfection Index

Intensive Aquaculture

Photosynthetic phytoplankton bloom cycles trigger daily pH fluctuations. Real-time digital pH/DO nodes prevent toxic un-ionized ammonia (NH3) spikes in Korean and Malaysian RAS fish farms.

Aquaculture Protection

Commercial Aquatics

Real-time dual pH & ORP transmitters drive peristaltic acid and hypochlorite injection. Keeps public facilities in strict compliance with WHO standards preventing swimmer eye/skin irritation.

Automated Chlorination

Hydroponic Smart Farming

Nutrient uptake lockout occurs when crop root zone pH leaves the narrow 5.8–6.2 window. The DCA130 Dual pH/EC controller adjusts fertilizer dosing precisely, maximizing crop yield.

Nutrient Lockout Guard

Innovation Trajectory

Technology Roadmap & Next-Generation Sensor Science (2026–2030)

From fragile wet electrochemistry to AI predictive diagnostics and solid-state ion-selective field effect transistors.

Phase 1: AI Predictive Health & Digital Glass Impedance

Legacy pH transmitters fail silently when glass membranes crack or reference junctions clog. BOQU's intelligent smart nodes continuously pulse high-frequency AC signals across the glass membrane and reference half-cells to measure resistance in real time. Dynamic algorithms forecast remaining sensor lifespan, calibration drift, and glass fouling days before failure.

Impedance Spectroscopy Predictive Maintenance

Phase 2: Solid-State ISFET & Optical pH Sensing

For applications where glass breakage introduces hazardous contamination risks (such as dairy processing, infant nutrition, and fine parenterals), solid-state ISFET (Ion-Sensitive Field-Effect Transistor) silicon semiconductors and luminescent lifetime optical chemical dyes provide robust glass-free monitoring capable of withstanding heavy mechanical pressure shocks.

Glass-Free ISFET Non-Invasive Optical

Phase 3: Digital Twin Cloud Integration & Auto-Titration

Transitioning from local PID loops to enterprise-wide water cloud networks. Digital twin models integrate raw influent wastewater characteristics, weather forecasts, and chemical holding volumes to dynamically adjust reagent dosage targets, saving chemical plants up to 28% in acid/alkali consumption annually while guaranteeing compliance.

Cloud Gateway Autonomous Titration

Direct China Manufacturer Advantage

Wholesale Factory Excellence: Direct Shanghai Manufacturing Infrastructure

Why Tier-1 global process distributors, systems integrators, and engineering houses partner directly with BOQU Shanghai.

Vertically Integrated Shanghai Workshops

Unlike trading resellers, BOQU manufactures sensors, machine glass membranes, populates SMT electronic circuit boards, and writes instrument firmware across two facilities in Pudong New Area (Kangqiao and Lingang) covering 4,632 m².

Stringent 48-Hour Burn-In & NIST Calibration

Every industrial transmitter undergoes 48-hour thermal chamber stress aging, isolation surge testing, and multi-point automated NIST-traceable buffer calibration before packaging, ensuring plug-and-play accuracy upon site commissioning.

Complete OEM / ODM Flexibility

We empower regional instrumentation brands with tailored CNC enclosure branding, proprietary Modbus register mapping, customized cable lengths, private labeled firmware, and custom multilingual operator interfaces.

ISO 9001 Quality System ISO 14001 Environmental CE European Conformity SGS Independent Audit FDA Device Registered Shanghai Brand (pH5806)

Technical & Procurement FAQ

Engineering Questions Overseas Buyers Ask Before Sourcing

Direct technical answers from BOQU's senior electrochemical applications and export teams.

Is BOQU a true factory or an export intermediary?

BOQU is a verified manufacturer founded in 2007. Research, sensor blowing, solid reference formulation, PCB mounting, transmitter assembly, calibration, and packing operate in our two facilities (Kangqiao and Lingang) in Shanghai spanning 4,632 m² with over 200 employees and an annual volume exceeding 100,000 units.

How do you handle pH measurement in high temperature (130℃) fermentation?

Standard glass electrodes fail above 80°C because internal KCl electrolyte boils or crystallizes, rupturing the glass membrane. BOQU's high-temperature bioprocess series (e.g., pH5806) utilizes specialized alkali-resistant high-impedance glass membranes, pressurized solid polymer electrolyte, and an internal thermal barrier rated for 130℃ steam sterilization.

What signal outputs and SCADA protocols do your controllers provide?

Our online controllers offer two isolated 4–20 mA analog outputs (loop powered or active), multi-range SPDT relays for high/low alarm or automated cleaning, and RS485 Modbus-RTU. Smart digital IoT sensors (such as IOT-485-pH) incorporate on-probe microprocessors, outputting standard Modbus-RTU straight to PLCs without separate transmitter hardware.

What minimum order quantities (MOQ) and lead times apply for OEM contracts?

Standard catalog sensors have no strict MOQ for qualification testing. For OEM custom labeling, modified cable leads, or customized enclosure colors, introductory batches can start as low as 10–20 units. Standard lead time for standard products is 3–5 working days; customized OEM bulk deliveries typically dispatch within 14–21 days via express air or sea freight.

How does automatic temperature compensation (ATC) function across wide thermal ranges?

According to the Nernst equation, electrode potential slope increases with temperature (~59.16 mV/pH at 25℃ vs ~70.08 mV/pH at 80℃). BOQU controllers utilize embedded Pt100, Pt1000, or NTC30K RTDs within the sensor tip, automatically executing real-time Nernst slope adjustments and solution dissociation corrections.

What information is required to get a precise factory configuration?

To recommend the optimum sensor and controller model, please communicate: process chemical composition, expected pH and ORP range, operating and peak cleaning temperatures, pipeline operating pressure, installation mode (immersion, inline flow cell, or retractable housing), and desired supervisory communication protocol.

Complete Process Line Catalog