High Temperature Core pH/ORP Sensors for Uzbekistan Plants
Engineered for sustained operation up to 130°C in chemical reactors, autoclave hydrometallurgy, and clean-in-place bioprocessing.
Uzbekistan’s Industrial Modernization & High-Temperature Process Demands
Under the national "Strategy Uzbekistan - 2030", heavy processing, petrochemical expansion, and biotechnology parks are shifting toward real-time electrochemical instrumentation.
Almalyk & Navoi Metallurgy: Autoclave Leaching Chemistry
The Navoi Mining & Metallurgy Combinat (NMMC) and Almalyk Mining-Metallurgical Combinat (AGMK) form the foundation of Central Asian non-ferrous metal recovery. Modern pressure oxidation (POX) autoclaves operate between 95°C and 130°C under severe acid slurry conditions (pH 0.5–2.0) with high dissolved solids.
Conventional glass pH electrodes fail rapidly in these environments due to lithium leaching in hot acid and diaphragm crystallization. BOQU's specialized high-temperature glass formulations with pressurized solid polymer reference matrices eliminate potassium chloride (KCl) dilution and resist sulfide poisoning, ensuring continuous redox and pH data during gold and copper solvent extraction cycles.
Thermal Energy: Syrdarya & Navoi TPP High-Purity SWAS
Thermal power generation at Syrdarya TPP, Navoi TPP, and modern combined-cycle gas turbine (CCGT) stations in Tashkent requires strict steam and water cycle chemistry control. Feedwater conditioning using ammonia or all-volatile treatment (AVT) demands high-temperature pH and ORP tracking at the deaerator outlet and boiler blowdown.
At operating sample temperatures up to 60°C–90°C (prior to secondary cooling), temperature coefficients must be accurately compensated using integrated Pt100/Pt1000 sensors. Accurate oxidation-reduction potential (ORP) feedback avoids costly boiler tube corrosion and turbine blade scale deposition.
Petrochemical & Agrochemical Clusters: Fergana & Ustyurt
At regional chemical complexes including Navoiyazot, Fergana Azot, and the Ustyurt Gas Chemical Complex, nitric acid, urea, ammonium nitrate, and polymer synthesis generate aggressive process streams. Neutralization reactions are highly exothermic, with operational liquid temperatures fluctuating between 80°C and 125°C.
In these conditions, mechanical seals and diaphragms are vulnerable. BOQU's S8-connector high-temp pH sensors incorporate a dual ceramic/PTFE annular junction that balances internal pressure, preventing aggressive chemical ingress into the inner reference cell.
Biopharmaceutical Fermentation in Tashkent Pharma Park
The Tashkent Pharma Park initiative has accelerated the growth of local production of antibiotics, active pharmaceutical ingredients (APIs), and sterile serums. In these applications, bioprocess vessels undergo repeated Clean-in-Place (CIP) and Steam-in-Place (SIP) sterilization cycles at 121°C–135°C under 2 bar steam.
BOQU's pH5806 sensors use certified food-grade reference electrolytes and pressurized gel systems. They maintain calibration throughout continuous sterilization cycles without drifting or requiring recalibration between process batches.
Why Central Asian Integrators Choose BOQU as Their Direct Chinese Supplier
Combining R&D depth, in-house glass blowing, dedicated high-temperature aging chambers, and direct Eurasian rail freight logistics.
Dedicated High-Temperature Sensor Lab
BOQU operates China’s first dedicated high-temperature sensor test lab. Every electrode undergoes a 48-hour thermal shock and pressure aging cycle before packaging, ensuring zero micro-fracturing along the glass-to-metal seal.
Direct Overland Silk Road Freight
Located in Shanghai with direct freight channels via the China-Kyrgyzstan-Uzbekistan corridor and regular rail cargo routes straight into Tashkent Sergeli customs terminals, BOQU reduces transit times to under 12 days at minimal freight cost.
Full OEM/ODM & Protocol Customization
We supply sensors compatible with existing legacy European transmitters (such as Endress+Hauser, Mettler Toledo, and Yokogawa) using standard VP6, S8, or Variopin connectors, as well as standalone digital RS485 Modbus RTU sensors for direct PLC integration.
Uzbekistan Market Wholesale Pricelist Framework (2025–2026)
Factory-direct EXW / CIP Tashkent volume price benchmarks for engineering contractors, system integrators, and industrial procurement departments.
| Model Category | Operating Temp & Pressure | Electrolyte & Junction Type | Standard Wholesale Range (10-49 Pcs) | Tier-1 Volume Contract (>100 Pcs) | Primary Industrial Use-Case |
|---|---|---|---|---|---|
| Standard Industrial High-Temp pH Sensor | 0 – 100℃ / 4 Bar | Polymer Gel / Porous Ceramic | $45 – $75 / pc | $32 – $48 / pc | Textile dyeing, chemical neutralization |
| Heavy Duty (0-130℃) S8 Connector pH Sensor | 0 – 130℃ / 6 Bar | High-Purity Viscous Gel / Annular PTFE | $85 – $130 / pc | $65 – $89 / pc | Fertilizer synthesis, hot chemical loops |
| Bio-Fermentation Steam-Sterilizable pH Sensor | 0 – 135℃ (SIP) / 6 Bar | Pre-pressurized Polymer Gel / Ceramic | $110 – $165 / pc | $82 – $118 / pc | Pharma fermentation, biotech bioreactors |
| High-Temp pH Sensor with Built-In Pt100/Pt1000 | 0 – 130℃ / 6 Bar | Double-Junction Polymer / Solid Gel | $95 – $145 / pc | $72 – $98 / pc | Power plant boiler SWAS, refinery cooling |
| Autoclave Slurry Redox (ORP) Sensor | -1500 to +1500 mV / 130℃ / 8 Bar | Pure Platinum Ring / Solid Kynar Diaphragm | $125 – $180 / pc | $95 – $130 / pc | Mining POX gold/copper hydrometallurgy |
| Digital Smart High-Temp pH/ORP Sensor (RS485) | 0 – 130℃ / 6 Bar (Modbus RTU) | Digital Microprocessor Core / Triple Junction | $180 – $260 / pc | $135 – $185 / pc | Direct PLC SCADA integration, smart factories |
Require a Formal Proforma Invoice or Custom Quotation?
We supply distributors and EPC contractors with complete DDP / CIP Tashkent terms, customs clearing documentation, and calibration certificates.
Overcoming Electrochemical Sensor Degradation in Extreme Environments
In high-temperature and highly alkaline or acidic industrial media, electrode failure typically stems from three mechanical and chemical mechanisms.
1. Glass Dissolution & Alkaline Error Correction
At temperatures exceeding 80°C, traditional hydrogen-selective silicate glass networks experience rapid leaching of sodium and lithium network-modifying ions. This structural breakdown increases internal glass membrane resistance and introduces substantial alkaline error (sodium ion cross-sensitivity above pH 10).
BOQU utilizes proprietary heavy-metal doped (titanium/zirconium stabilized) glass bulbs with low impedance characteristics. This design maintains theoretical Nernstian slope sensitivity ($>98.5\%$) up to 130°C and minimizes alkaline ion distortion in high pH caustic wash or boiler water systems.
2. Electrolyte Depletion & Reference Junction Clogging
Standard liquid KCl electrodes subject to fluctuating thermal cycles suffer from fluid pumping: expansion pushes electrolyte out during heating, while contraction draws process fluid back across the diaphragm during cooling. This introduces heavy metals, sulfur compounds, and process solids that precipitate insoluble silver chloride at the junction.
Our solution utilizes a solid polymerized cross-linked gel reference loaded with excess KCl crystal reserves, paired with a dual-diaphragm PTFE porous ring. The reference maintains high chemical resistance, preventing process ingress while providing stable reference potential for over 12 continuous operational months.
3. Zero-Potential Drift & Isothermic Tuning
When process temperatures cycle between 20°C and 130°C, electrochemical sensors often experience zero-potential shifts ($E_0$) if the inner buffer composition is poorly matched to the reference cell's temperature coefficient.
BOQU sensors feature precisely tuned internal electrolyte buffers and reference systems that ensure the sensor’s Isothermic Point falls exactly at pH 7.00. This alignment ensures built-in Pt100/Pt1000 temperature elements compensate accurately across wide thermal ranges without requiring frequent zero-point recalibration.
Practical Engineer Recommendation for Uzbekistan Facilities:
For hydrometallurgical slurries (e.g., AGMK Almalyk), always specify sensors with an integrated flat glass membrane or heavy-duty hemispherical bulb alongside pressurized immersion housings to prevent mechanical abrasion from ore particles.
Integrated Instrumentation Packages for Complex Industrial Installations
Beyond individual sensor supply, BOQU delivers complete pre-engineered analysis skids, automated cleaning assemblies, and digital transmitter networks.
SWAS Sample Conditioning Skids
Complete sampling racks designed for thermal power stations and petrochemical steam loops. Features high-pressure sample coolers, primary pressure reducers, thermal shut-off valves, and high-temperature flow-through pH/ORP cells.
Automated Pneumatic Retractable Holders
Enables safe extraction, cleaning, and recalibration of high-temperature pH electrodes from pressurized pipelines (up to 6 bar at 130°C) without interrupting plant production or draining lines.
Multiparameter Digital Gateways
Combines signals from high-temp pH, dissolved oxygen, and toroidal conductivity sensors into a single RS485 Modbus RTU or Profibus-DP feed, simplifying DCS integration for major EPC contractors.
High Temperature pH & ORP Sensor Series for Industrial Export
Select from our complete range of high-temperature sensors, manufactured to international standards and delivered directly to Central Asia.
Frequently Asked Questions by Uzbekistan Engineering Buyers
Essential guidance on logistics, cross-compatibility, certification, and localized deployment.
What is the standard lead time and shipping route to Tashkent?
For standard wholesale orders (20–100 pieces), lead time is typically 3–5 working days from factory dispatch. Shipping operates via direct air cargo (Shanghai Pudong PVG to Tashkent TAS, 3–4 days) or direct overland rail freight via Khorgos/Alashankou (7–12 days) straight to the Sergeli customs clearance terminal.
Are BOQU sensors compatible with legacy European and American transmitters?
Yes. BOQU supplies high-temperature pH and ORP sensors with standard VP6, S8, and Variopin plugs matching international pinouts. Our mV analog outputs and built-in Pt100/Pt1000/NTC30k RTDs connect seamlessly to legacy Endress+Hauser, Mettler Toledo, Yokogawa, and Emerson Rosemount transmitters.
Which certifications are provided for local Uzbek metrology compliance?
Every sensor is manufactured under ISO 9001 and ISO 14001 quality frameworks, carrying CE and SGS certifications. We supply factory calibration certificates, material traceability reports (3.1 certificates on metallic wetted parts), and sanitary FDA compliance documentation for food and pharmaceutical plants.
How does the solid polymer electrolyte prevent poisoning in sulfur-rich mining media?
Conventional liquid electrolyte junctions allow sulfide ($S^{2-}$) and heavy metal ions to diffuse into the reference half-cell, precipitating silver sulfide ($Ag_2S$) and permanently fouling the electrode. BOQU’s high-temperature series uses an Ag/AgCl reference cartridge with a tortuous diffusion path and pressurized polymer gel, blocking ionic exchange with the sample fluid.
What cable lengths and insulation jackets are recommended for hot chemical pipelines?
Standard PVC cables degrade quickly above 60°C. For industrial processing in Fergana or Navoi, we supply custom 5m, 10m, or 20m low-noise coaxial cables protected with heat-resistant PTFE (Teflon) or silicone outer jackets rated to withstand continuous ambient exposure up to 150°C.
Can BOQU produce private-label (OEM) sensors for local Uzbek automation distributors?
Yes. We support custom laser marking, branded packaging, custom insertion lengths (120mm, 225mm, 325mm, 425mm), and custom Modbus register configurations for Central Asian automation houses and engineering distributors.
Partner Directly with China’s Leading High-Temp Sensor Manufacturer
Optimize your plant maintenance budget, reduce unscheduled downtime in critical processes, and establish an agile supply chain for your operations across Uzbekistan and Central Asia.