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 Tds Ec Sensor Supplier & Suppliers

Precision Hardware Catalog

High-Performance Online Water Quality & EC Analyzers

Continuous monitoring electrodes and micro-transmitters manufactured in ISO 9001 certified Shanghai facilities, factory-calibrated for low drift and long operating lifespan.

pH5806 High Temperature pH Sensor

Engineered with polymer solid electrolyte and circular ceramic diaphragms for bioreactors and CIP hot-media steam sterilization.

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DOG-208FA high temperature dissolved oxygen sensor

DOG-208FA High Temp DO Sensor

Polarographic micro-membrane design built for sanitary fermentation tanks and high-pressure steam environments.

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IOT-485-pH digital online pH sensor with RS485 Modbus

IOT-485-pH Smart Digital Sensor

Direct RS485 Modbus RTU telemetry without external transmitters, enabling edge computation and cloud integration.

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ZDYG-2088-01QX Online Turbidity

90-degree infrared scattered light measurement with mechanical wiper for zero-fouling in sewage and sludge analysis.

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DCA130 online pH and EC dual channel analyzer

DCA130 Dual Channel pH & EC Meter

Unified digital controller simultaneously recording electrolytic conductivity and pH levels for RO and hydroponics.

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MPG-6099Plus multi-parameter water quality analyzer panel

MPG-6099Plus Integrated Panel

Pre-engineered flow-cell skid system incorporating EC, TDS, residual chlorine, pH, and turbidity in one enclosure.

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pHG-2081Pro industrial online pH analyzer

pHG-2081Pro Industrial Analyzer

Rugged IP65 field-mount transmitter providing dual 4-20mA current loops and dual SPDT programmable alarm relays.

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SJG-2083CS online acid and alkali concentration meter

SJG-2083CS Acid/Alkali Concentration

Inductive toroidal conductivity meter calculating chemical concentration curves for HCl, H2SO4, and NaOH lines.

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Global Supply Chain Intelligence

Enterprise Sourcing: Navigating China TDS EC Sensor Suppliers

In the transition toward Industry 4.0 and algorithmic water purification, procurement executives evaluate Chinese manufacturers on sensor cell constants, metallurgical integrity, and digital bus reliability.

Electrode Cell Constant Selection (k=0.01 to k=30)

Global procurement teams must specify exact cell geometry. For ultrapure water loops (<0.055 µS/cm), BOQU supplies k=0.01 316L/titanium coaxial sensors. Industrial wastewater or sea brine desulfurization mandates toroidal inductive sensors (k=10.0 to 30.0) immune to polarization and chemical scale build-up.

Titanium & Platinum-black electroplating
Non-contact toroidal induction technology

Thermal Compensation & Pressure Metallurgy

Pure water conductivity shifts drastically with temperature (+5.5%/°C). Enterprise tier suppliers incorporate embedded Pt1000 RTD resistance probes inside the inner electrode, coupled with firmware running non-linear compensation algorithms aligned with ASTM D1125 and DIN EN 27888 industrial standards.

Operating pressure resistance up to 1.6 MPa
Dynamic temperature range from -10°C to 130°C

Total Cost of Ownership (TCO) Economics

Partnering with genuine Chinese manufacturers delivers up to 45% CAPEX reduction over European and Japanese brands without performance trade-offs. BOQU's dual factories eliminate middleman margins while providing standardized replacement consumable probes and swappable cable assemblies.

Substantial multi-year consumable savings
Complete OEM/ODM customization capability

Application Engineering

Macro Industry Solutions Powered by TDS & EC Analytics

From microelectronics wafer fabrication to municipal reuse pipelines, conductivity and total dissolved solids sensors represent the bedrock metric for process integrity and closed-loop dosing.

Thermal & Nuclear SWAS Loops

Boiler feed water demands relentless detection of trace cation conductivity (<0.1 µS/cm) to prevent catastrophic boiler tube rupture, stress corrosion cracking, and turbine blade deposits.

Industrial Desalination & RO

Multi-stage membrane filtration relies on dual EC sensors measuring influent brine and permeate TDS, directly calculating recovery percentages and triggering automated CIP cycles.

Precision Vertical Hydroponics

Real-time ionic concentration analytics empower commercial greenhouses to regulate mineral nutrient dosage, preventing root burn and nutrient lockout while accelerating crop turn cycles.

Semiconductor UPW Systems

Fabrication plants require continuous 18.2 MΩ·cm resistivity and ultra-low TDS detection to guarantee particle-free rinse water during nanoscale photolithography and chemical-mechanical planarization.

Engineering Matrix

TDS & EC Sensor Technical Selection Architecture

Review comprehensive cell constants, materials of construction, and signal outputs across our high-temperature and digital telemetry portfolios.

Cell Constant (k)	Measuring Range	Electrode Material	Wetted Components	Max Pressure / Temp	Optimal Industry Application
k = 0.01	0.005 to 20.00 µS/cm	Titanium / 316L SS	PTFE, Fluoroelastomer	1.0 MPa / 130°C	Semiconductor UPW, Power Plant Boiler Feed & SWAS
k = 0.1	0.1 to 200.0 µS/cm	316L Stainless Steel	PVDF, EPDM O-Ring	1.0 MPa / 100°C	Reverse Osmosis (RO) Permeate, Distilled Water
k = 1.0	1.0 to 2,000 µS/cm	Platinum / Graphite	Polysulfone, Viton	0.6 MPa / 80°C	Drinking Water Treatment, Cooling Towers, Hydroponics
k = 10.0	10 to 20,000 µS/cm	Platinum Black	PPS / Peek Polymer	0.6 MPa / 80°C	Wastewater Neutralization, Industrial Effluent, Brine
Toroidal (Inductive)	100 to 2,000,000 µS/cm	Non-Contact Magnetic Coil	Molded PEEK / PFA	1.6 MPa / 140°C	CIP Caustic (NaOH), Acid Regeneration, Flue Gas Scrubber

Direct OEM Capacity

Shanghai BOQU Instrument Manufacturing Scale

Continuous investment in automated production benches, environmental testing chambers, and strict 48-hour burn-in cycles delivers proven operational stability.

2007

Founded in Shanghai

4,632 m²

Dual Facility Footprint

100,000+

Annual Unit Output

100+

Export Destinations

Technological Roadmap

The Future of Liquid Analysis: Edge AI & Next-Gen Sensors

Shanghai BOQU Instrument is transitioning from passive analog electrodes to intelligent self-diagnostic edge analytical nodes engineered for Industry 5.0 ecosystem connectivity.

Self-Calibrating Edge Microcontrollers

Integrating miniature ARM Cortex processing units within the sensor head allows autonomous calculation of electrode polarization impedance, real-time drift estimation, and pre-emptive cleaning warnings before measurements fail.

Wireless Industrial LoRaWAN & NB-IoT

Battery-powered low-power wide-area network (LPWAN) transmitters allow autonomous monitoring across remote river basins, regional distribution mains, and expansive open-pond aquaculture without laying field telemetry cables.

Ultra-Corrosive Resistant Diamond & PEEK

Next-generation materials, including Boron-Doped Diamond (BDD) coatings and reinforced polyetheretherketone bodies, offer unprecedented durability against aggressive fluorides, hot chromic acid, and petrochemical solvents.

Regulatory & Logistics Assurance

Seamless Global Integration and Compliance Assurance

Enterprise procurement requires confidence in international standards, rigorous factory audits, and robust shipping safeguards across international frontiers.

Accredited Global Certifications

Fully compliant with European CE safety standards, RoHS environmental limits, ISO 9001 quality management, and ISO 14001 environmental stewardship protocols.

Fieldbus Protocol Interoperability

Sensors are pre-configured to interface transparently with Siemens, Allen-Bradley, ABB, and Schneider PLC architectures via Modbus-RTU, Profibus-DP, and HART.

Export-Grade Protective Packaging

Custom shock-absorbing molded foam and humidity-sealed foil packaging protect sensitive electrodes, reference junctions, and optical surfaces throughout intercontinental air and sea transit.

Multilingual Technical Support

Dedicated application engineers based in Shanghai provide real-time schematic reviews, installation consultations, and calibration troubleshooting via remote desktop and video assistance.

Engineering Knowledge Base

Frequently Asked Questions: TDS & EC Procurement

Authoritative technical guidance compiled by BOQU senior instrumentation and electrochemical engineers.

What is the conversion relationship between EC (µS/cm) and TDS (ppm)?

Total Dissolved Solids (TDS) cannot be measured directly by an electronic probe; it is calculated from electrical conductivity (EC) via an empirical factor: TDS (ppm) = EC (µS/cm) × Conversion Factor. This factor ranges from 0.50 (for pure NaCl solutions) to 0.65–0.70 (typical agricultural and municipal waters) and up to 0.85 for complex brines. BOQU online transmitters allow operators to customize this factor dynamically in software.

When should an inductive toroidal sensor be selected over contacting electrodes?

Contacting electrodes (2-pole or 4-pole) suffer from electrolytic polarization, surface fouling, and junction degradation in liquids exceeding 10,000 µS/cm or solutions carrying heavy oils, sludges, or biological growth. Toroidal inductive sensors utilize two completely encapsulated toroidal coils. Because magnetic coupling drives the ion current, the sensor has no bare metal surfaces exposed, guaranteeing near-zero maintenance in corrosive CIP caustic or wastewater basins.

How does temperature compensation function in boiler ultrapure water?

Ultrapure water exhibits self-ionization behavior governed by the dissociation of H2O into H+ and OH- ions, yielding an extreme non-linear temperature coefficient of up to 5.5% per °C at 25°C. Conventional linear compensation formulas cause severe errors. BOQU transmitters incorporate dedicated ASTM D1125 non-linear algorithm routines, calculating both matrix water dissociation and impurity salt conductivity independently.

Is BOQU an original equipment manufacturer (OEM) or a trading intermediary?

Shanghai BOQU Instrument Co., Ltd. is a verified high-tech manufacturer founded in 2007. Operating two specialized facilities across Kangqiao and Lingang, Shanghai, spanning 4,632 square meters, we execute precision machining, glass electrode blowing, sensor head potting, circuit board SMT assembly, and multi-stage standard calibration entirely in-house.

Can you provide customized cable lengths, threaded fittings, and firmware?

Yes. BOQU operates dedicated mechanical and software engineering departments supporting OEM and ODM projects. We routinely manufacture sensors with custom process connections (NPT 3/4", PG13.5, Tri-Clamp sanitary flanges), special submersible double-shielded polyurethane cables up to 100 meters, customized Modbus register mappings, and private-label silk-screen branding.

What is the typical calibration interval and field lifespan of an EC probe?

In clean water applications (RO permeate or drinking water), BOQU contacting sensors typically operate without recalibration for 6 to 12 months. In harsh chemical dosing or dirty municipal effluents, a monthly inspection and cleaning with 5% dilute acid or detergent is recommended. The typical operating life ranges between 2 to 5 years depending on process temperature and media corrosiveness.

Complete Instrument Ecosystem

High-Temperature Electrodes & Advanced Analytical Systems

Explore specialized steam-sterilizable sensors and multi-parameter process transmitters engineered to withstand thermal cycling and corrosive industrial environments.