Precision Flow & High-Temperature Process Sensors
Engineered for extreme hydrodynamic conditions, our primary instrument line couples rugged mechanical durability with micro-potentiometric accuracy across industrial closed-loop systems.
High Temperature (0-130℃) pH Sensor with Temp Compensation
Designed for severe thermal cycles and continuous inline stream immersion up to 130°C. Features internal Pt100/Pt1000 RTD and specialized pressurized gel electrolyte.
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Pharmaceutical Fermentation High-Temp pH Sensor
Engineered for SIP/CIP cycles in sanitary bioreactors and biopharma fermenters. Highly resistant to protein fouling and aggressive autoclave sanitation.
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Industrial Grade (0-130℃) pH Sensor Cell
Heavy-duty annular ceramic diaphragm with double-junction Ag/AgCl reference. Minimizes junction potential poisoning in high-velocity pipelines.
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High-Temperature S8 Connector pH Sensor Head
Features standardized S8/PG13.5 threaded head for rapid drop-in integration into flow cells, immersion holders, and retractable hygienic housings.
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pH5806 Industrial High Temperature pH Sensor
Awarded the prestigious Shanghai Brand certification. Robust glass membrane resists alkaline errors and withstands repeated thermal shocks up to 130°C.
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DOG-208FA High Temperature DO Sensor
Polarographic dissolved oxygen electrode with reinforced stainless steel body. Delivers stable nanoamp-level readings in aerobic fermentation broth.
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IOT-485-pH Smart Digital Online pH Sensor
Direct RS485 Modbus RTU interface with internal signal processor. Eliminates signal degradation over long pipeline runs and interfaces directly to SCADA/PLC.
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ZDYG-2088-01QX Infrared Turbidity & TSS Sensor
Utilizes 860nm ISO 7027 near-infrared scattered light technology with optional motorized wiper blade. Eliminates particulate coating in high-flow open flumes.
View SpecificationsThe Global Status of Professional Flow Metering & Fluid Instrumentation
Modern industrial processing demands continuous, real-time quantification of dynamic liquid volumetric velocity, mass flow rates, and chemical composition under harsh, non-ideal hydraulic regimes.
Electromagnetic & Ultrasonic Dominance
Global industrial water networks rely heavily on non-intrusive ultrasonic time-of-flight flow meters and Faraday-principle electromagnetic flow meters. Because these designs avoid moving mechanical parts, they eliminate line pressure drop, resist particulate scaling, and maintain long-term calibration stability across slurries, effluent streams, and raw water intake networks.
Coupling Hydrodynamics with Chemistry
A flow meter alone measures volumetric movement, but modern environmental and process regulations demand integrated mass loading monitoring. Leading EPC contractors require combined instrumentation nodes where flow rate, pH, dissolved oxygen, turbidity, and chemical oxygen demand (COD) feed synchronously into unified mass balance equations for precision dosing.
Severe Environment Resilience
Whether navigating abrasive mining slurries, corrosive chemical dosers, high-pressure boiler feedwater, or 130°C pharmaceutical clean-in-place (CIP) steam lines, industrial buyers demand flow cells and analytical probe wet-ends lined with specialized polymers (PTFE, PFA, PEEK) and corrosion-resistant metallurgy (Hastelloy C-276, Titanium, 316L SS).
Why Tier-1 Chinese Wholesalers & Factories Lead in Precision Instrumentation
Combining world-class component supply chains in Shanghai with proprietary automated calibration loops, China provides unprecedented manufacturing velocity, rigorous metrological consistency, and unmatched economies of scale.
Integrated Metrology R&D
Full in-house control from glass formulation and blowing to high-temperature gel formulation, SMD circuit mounting, automated flow test loops, and embedded firmware development ensures pristine signal purity.
Capital Efficiency & Scale
Operating dedicated manufacturing bases in Shanghai (Kangqiao and Lingang) totaling 4,632 m² of specialized production space produces over 100,000 instruments annually, reducing unit costs without compromising sensor tolerance.
48-Hour Burn-In Verification
Every industrial transmitter, smart digital probe, and online flow analyzer undergoes continuous 48-hour thermal aging and simulated hydro-shock testing prior to packaging to virtually eliminate infant mortality.
Comprehensive OEM/ODM Agility
From private labeling, customized immersion barrel lengths, and specialty titanium fittings to proprietary Modbus register mapping and cloud protocol wrapping, we adapt to OEM distributor specifications within days.
Established
Floorspace
Staff & Engineers
Units / Year
Countries Served
Enterprise Clients
Mission-Critical Application Scenarios & System Topologies
From sterile pharmaceutical seed reactors to aggressive municipal outfalls, our instrumentation is architected to perform in the world's most unforgiving fluid process loops.
Biopharma Fermentation
During bacterial cultivation, rapid nutrient uptake alters broth pH and consumes oxygen within seconds. Probes must survive repeated 130°C steam sterilizations without losing glass membrane hydration or experiencing reference electrolyte boil-off.
Industrial Wastewater Treatment
Discharge compliance requires continuous recording of effluent mass loads. Real-time open-channel flow metering paired with optical TSS, COD, and neutralization dosing control prevents costly regulatory fines before discharge occurs.
Thermal Power Plant SWAS
Supercritical boiler tubes and steam turbine blades deteriorate under ppb-level corrosive contaminants. Continuous Steam and Water Analysis Systems (SWAS) monitor ultra-pure cation conductivity, silica, sodium, and dissolved hydrazine.
Drinking Water Utilities
Preserving secondary network safety requires continuous monitoring of residual free chlorine, low-range turbidity, and TOC to guarantee disinfection efficacy and prevent disinfection byproduct (DBP) formation across municipal pipelines.
Modern Aquaculture & RAS
In high-density recirculating aquaculture systems (RAS), biological oxygen demand can spike dangerously within minutes. Fast-response optical DO and pH probes trigger variable frequency drives (VFD) on paddle aerators automatically.
Hydroponics & Vertical Farming
Commercial greenhouse irrigation requires dynamic blending of concentrated fertilizer solutions. Real-time dual-channel pH and conductivity analyzers maintain precise nutrient equilibrium to maximize crop yield without root burn.
Emerging Technology Trends in Process Flow & Fluid Metrology
Digital transformation, low-power telemetry, and edge-computed diagnostics are reshaping industrial instrumentation architectures from field transmitters to central enterprise DCS systems.
Edge Sensor Intelligence & Direct Modbus
Traditional 4-20mA analog loops are vulnerable to electromagnetic noise from large pump inverters. Contemporary instrumentation features integrated 32-bit ARM processors directly on the sensor probe head, outputting native RS485 Modbus RTU or digital protocols. This enables direct telemetry to cloud gateways, PLCs, and SCADA servers without intermediary transmitters.
Predictive Drift Compensation & Diagnostics
Smart sensors now store internal calibration logs, slope curves, zero offsets, operating hour profiles, and glass impedance values. Embedded algorithms detect impending electrode fouling, diaphragm clogging, or electrolyte depletion before process errors manifest, notifying maintenance engineers via automated diagnostic flags.
Optical Fluorescence Over Polarography
Industrial dissolved oxygen measurement is rapidly transitioning from Clark polarographic electrochemical membranes toward lifetime luminescence quenching optical sensors. Optical DO sensors require no consumable electrolyte, do not consume dissolved oxygen, and remain immune to sulfide poisoning in harsh waste aeration streams.
| Analytical Parameter | Primary Measurement Principle | Hydrodynamic & Flow Condition Tip | Recommended Sensor Body / Material | Output Telemetry |
|---|---|---|---|---|
| Process pH & ORP | Potentiometric glass bulb; Ag/AgCl double junction | Ensure continuous linear flow velocity >0.5 m/s to prevent fouling; avoid cavitation. | PPS / Ryton body, high-temp glass, S8/PG13.5 | 4-20mA, RS485 Modbus RTU, Relay |
| Dissolved Oxygen (DO) | Optical fluorescence quenching or polarographic | Optical sensors are flow-independent; polarographic requires minimum face velocity (>0.1 m/s). | 316L Stainless Steel, Titanium, POM | Direct RS485 Modbus, 4-20mA |
| Conductivity & Salinity | Inductive (toroidal coil) or 2/4-electrode cell | Use inductive sensors for high fouling/salts; 2-electrode for ultra-pure SWAS water loops. | PEEK / PVDF for inductive, 316L for pure water | RS485, 4-20mA, Alarm Relays |
| Turbidity & TSS | 90°/180° ISO 7027 near-IR scattered light (860nm) | Install in vertical up-flow pipelines or open channels with motorized wiper cleaning. | 316L SS housing, scratch-proof sapphire lens | RS485 Modbus RTU |
| Residual Free Chlorine | Amperometric 3-electrode constant voltage | Maintain constant flow rate via transparent flow-through cell; pair with inline pH compensation. | Acrylic flow cell, Platinum/Gold electrode | Dual 4-20mA, RS485, Dosing PID Relays |
| Trace Silica & Sodium | Colorimetric photometric reaction / Ion-selective | Requires pressure-reducing and temperature-quenching SWAS sampling rack ahead of analysis. | Industrial reagent bench, optical quartz cell | Analog 4-20mA, RS485 SCADA link |
Global Enterprise Procurement Strategy: Total Cost of Ownership (TCO)
International instrumentation buyers and EPC contractors evaluate equipment beyond the initial unit quote. High reliability reduces unplanned outages, consumable reagent costs, and technician callouts.
OPEX vs. CAPEX Calculation
Initial acquisition cost constitutes merely 20-30% of an online analyzer's lifecycle cost. Sensors that endure repeated high-temperature clean-in-place cycles, feature self-cleaning wiper assemblies, or utilize solid polymer gel references minimize routine maintenance, yielding dramatic 3-year TCO savings.
International Compliance Conformance
Overseas projects require verified certification profiles. BOQU instruments are audited under ISO 9001 and ISO 14001 management systems, backed by CE conformity, SGS third-party testing, and compliance with FDA material extraction guidelines for food, beverage, and sterile biotechnology lines.
Supply Continuity & Spare Parts
Plant downtime can cost thousands of dollars per hour. Wholesaling through BOQU grants access to guaranteed spare parts warehousing, rapid 7-day international dispatch for replacement electrodes, standardized modular connectors, and dedicated application engineering support.
Field Installations Across Five Continents
Our analytical sensors and flow process monitors operate continuously in major industrial operations worldwide.
India
Fermentation pH Control
Pharmaceutical manufacturer maintaining continuous broth pH balance during rigorous steam sterilization to ensure high batch yield.
Beijing
Waste Incineration SWAS
Real-time boiler feedwater and steam loop monitoring protects power turbines against silica scaling and premature corrosion.
Russia
Biotech Food Production
Continuous pH and optical DO sensors provide reliable process feedback for sterile and non-sterile food protein synthesis.
USA
Municipal Chlorine Residual
Online residual chlorine analyzers keep potable water disinfection compliant with strict WHO and municipal standards.
Korea
Automated RAS Aquaculture
Continuous DO, temperature, and ammonia monitoring protects expensive crustacean and marine stocks with automated aerator control.
Malaysia
Indoor RAS Fish Farms
Direct RS485 digital sensors monitor recirculating water quality round-the-clock for year-round high-yield commercial output.
Brazil
Commercial Hydroponics
Dual-channel pH and conductivity analyzers automate fertilizer injection lines, preventing nutrient lockout across commercial crops.
Vietnam
Industrial Park Effluent
A 200 m³/day plant in northern Vietnam maintains strict compliance with the national QCVN 40:2011/BTNMT Class A standard.
Frequently Asked Questions by Global Engineers & Buyers
Comprehensive engineering insights regarding sensor calibration, high-temperature resilience, communication architecture, and factory lead times.
Is BOQU a direct instrument manufacturer or a trading agent?
Shanghai BOQU Instrument Co., Ltd. is an original equipment manufacturer (OEM) established in 2007. We operate two production plants in Pudong New Area, Shanghai (Kangqiao and Lingang) covering 4,632 m² of specialized floorspace. All R&D, PCB assembly, glass fabrication, multi-stage calibration, and packaging are handled completely in-house.
How do high-temperature sensors survive 130°C SIP steam cycles without drifting?
Standard glass electrodes fail at elevated temperatures due to internal electrolyte boiling, reference silver chloride precipitation, and hydration layer stripping. Our pH5806 and high-temperature series utilize proprietary pressurized polymer gel electrolytes, specialized annular ceramic junctions, and lithium-doped high-temperature impedance glass to ensure stability through repeated autoclave and SIP cycles.
What communication protocols are supported for PLC and SCADA integration?
Our online controllers provide dual isolated 4-20mA analog loops with programmable span, configurable SPDT relay alarm outputs, and digital RS485 Modbus RTU connectivity. Furthermore, our standalone smart IoT sensors feature integrated protocol transceivers, outputting direct RS485 Modbus RTU directly into SCADA master networks, edge compute gateways, or DCS controllers.
Can you provide custom private labeling and OEM design modifications?
Yes. Over 40% of our production volume supports private-label distribution and instrumentation engineering firms globally. OEM/ODM services include custom probe cable lengths, alternative wetting materials (Hastelloy, Titanium, PEEK), specialized firmware register layouts, custom startup splash screens, and private-label silk-screen branding.
What quality certifications and audit standards do your factories satisfy?
Our manufacturing and environmental facilities are certified under ISO 9001 and ISO 14001. Products carry CE conformity marking, SGS verification reports, and FDA-compliant material certifications for food, beverage, and pharmaceutical wet-ends. The flagship pH5806 sensor holds the prestigious Shanghai Brand certification.
What parameters are required to get an exact analyzer model recommendation?
To specify the optimal sensor, please provide: the target analyte/parameters, anticipated measurement range, operating and maximum fluid temperature and line pressure, pipeline diameter and flow velocity, chemical composition (presence of fats, oils, solvents, or sulfides), required power supply, and desired output communication protocols.
Online Chemical Analyzers, Multi-Parameter Panels & SWAS Systems
Engineered for continuous baseline stability and zero-drift chemical quantification in municipal water networks, boiler feedwater loops, and chemical dosing stations.
DCA130 Online pH & EC Dual Channel Controller
Monitors pH and electrical conductivity simultaneously on a single backlit controller. Conserves panel cutouts in hydroponics, RO skids, and cooling tower dosing.
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MPG-6099Plus Integrated Water Quality Panel
Turnkey wall-mount station integrating pH, residual chlorine, turbidity, conductivity, and dissolved oxygen with integrated manifold piping and touch display.
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pHG-2081Pro Industrial Online pH/ORP Analyzer
Flagship microprocessor transmitter featuring isolated 4-20mA, Modbus RS485, and PID dosing control. IP65 weatherproof casing suits harsh chemical plant rooms.
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SJG-2083CS Inline Acid & Alkali Concentration Meter
Toroidal electrodeless sensor measuring chemical percent concentration (HCl, H₂SO₄, NaOH, HNO₃). Immune to electrode polarization and harsh chemical corrosion.
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Online Amperometric Free Chlorine Analyzer
Continuous free residual chlorine measurement without chemical reagents. Features auto-temperature and inline pH software compensation for high accuracy.
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Online Silicate, Phosphate & Sodium Trace SWAS
Trace-level colorimetric and potentiometric analyzers measuring ultra-pure boiler steam. Delivers sub-ppb resolution to prevent catastrophic turbine scaling.
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TOC-3042 Online Total Organic Carbon Analyzer
UV persulfate oxidation method designed for USP/EP compliant pharmaceutical purified water, WFI loops, and semiconductor UPW organic load quantification.
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Online COD, TP, TN & Heavy Metal Compliance Bench
Automated wet-chemistry cabinet analyzer with integrated micro-metering syringe pumps, auto-cleaning, and optical digestion for environmental regulatory reporting.
View SpecificationsPartner with Shanghai BOQU Instrument Co., Ltd.
Collaborate directly with our senior application engineers to review piping layouts, calculate hydrodynamic Reynolds numbers, specify wetted materials, and configure complete digital instrumentation packages for your international projects.