Description
Fluidized Bed Thermocouple is a specialized duplex K-Type temperature sensor designed for accurate temperature measurement in fluidized bed boilers, reactors, dryers, and combustion systems where abrasive particles continuously impact the sensing assembly. Unlike conventional thermocouples, this model incorporates a dual-diameter construction that protects the sensing element from severe mechanical wear while maintaining reliable temperature measurement.
The thermocouple consists of an 8 mm duplex SS310 / Inconel 600 sensing insert housed inside a robust 22 mm outer protection tube. The outer tube absorbs continuous abrasion from circulating sand, catalyst particles, ash, or other process media, while the protected sensing insert remains isolated from direct particle impact. This design significantly extends sensor service life in fluidized bed applications where standard sheathed thermocouples may experience rapid wear.
The duplex K-Type sensing configuration provides two independent temperature measurement circuits within a single assembly. If one sensing element reaches the end of its service life, the second element can continue monitoring while maintenance is scheduled, reducing process interruptions and improving plant availability.
The SS310 / Inconel 600 sensing insert offers excellent resistance to oxidation and thermal fatigue at elevated temperatures, making it suitable for demanding combustion and process heating environments. The compact 450 mm insertion length is optimized for typical fluidized bed depths, ensuring accurate measurement within the active process zone without unnecessary overhang.
For hazardous industrial environments, the thermocouple is equipped with a flameproof die-cast aluminium terminal head with IP67 protection and double cable entry, ensuring reliable performance in areas exposed to dust, moisture, vibration, and potentially explosive atmospheres.
Key Features
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Dual-Diameter Armor Layout Houses a highly responsive 8 mm Inconel insert inside a thick 22 mm outer protection tube to block high-velocity particulate erosion.
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Dual-Signal Duplex Calibration Contains two isolated K-type loops inside a single sensor housing for simultaneous control and emergency safety system tracking.
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Certified Flameproof IP67 Enclosure Heavy-walled explosion-proof aluminum head completely isolates electrical connections within volatile, gas-classified zones.
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Double Cable Entry Interface Built with dual distinct conduit connection ports, allowing field teams to pull physically separated control and safety cables.
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Optimized 450 mm Bed-Depth Profile Compact insertion footprint avoids massive cross-flow mechanical stress while tracking dynamic core bed heat zones.
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Premium SS310/Inconel 600 Internal Core High-nickel alloy insert sleeve delivers exceptional thermal transfer rates and superior high-temperature oxidation protection.
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Passive Thermoelectric Core Architecture Operates as a completely self-powered field instrument, transmitting low-voltage loops without external excitation lines.
Applications
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Fluidized Bed Combustion (FBC) Power Boilers Reliable core thermal regulation inside highly turbulent coal, biomass, and sand-circulating boilers.
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Fluidized Bed Dryers (FBD) in Pharmaceuticals Safe, continuous drying tracking under high-velocity powder and granulate friction paths.
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Fluid Catalytic Cracking (FCC) Refinery Units High-wear temperature mapping inside volatile petrochemical catalyst recycling zones.
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Chemical Calcination and Roasting Furnaces Tracking raw material processing steps involving high-temperature moving solids and abrasive mineral beds.
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Granular Media Transport and Powder Silo Inlets Monitoring high-volume chemical blending loops where heavy solids scour process equipment surfaces.
Datasheet
FAQs
1. What is a Fluidized Bed Thermocouple?
A Fluidized Bed Thermocouple is a heavy-duty industrial temperature sensor specifically designed for boilers, reactors, dryers, and other applications where abrasive particles continuously circulate around the sensing element. Its reinforced construction provides superior protection against erosion, mechanical wear, and high temperatures, ensuring accurate and reliable temperature measurement with extended service life.
2. Why is a protection tube used in Fluidized Bed applications?
A 22 mm outer protection tube absorbs the continuous impact of abrasive particles such as sand, catalyst, ash, and other process media, protecting the 8 mm Inconel 600 sensing insert from direct erosion. This robust design significantly reduces premature sensor failure, minimizes maintenance frequency, and extends the operational life of the thermocouple in severe industrial environments.
3. Where are Fluidized Bed Thermocouples used?
Fluidized Bed Thermocouples are widely used in CFBC (Circulating Fluidized Bed Combustion) boilers, BFBC (Bubbling Fluidized Bed Combustion) boilers, combustion chambers, reactors, industrial dryers, petrochemical plants, chemical processing facilities, powder handling systems, cement plants, power generation units, and other high-temperature industrial heating applications where resistance to abrasion is critical.
4. Why Choose Aavad Instrument Fluidized Bed Thermocouples?
Aavad Instrument Pvt. Ltd. Fluidized Bed Thermocouples are engineered for demanding abrasive industrial environments using premium-grade Inconel 600 sensing inserts, heavy-duty protection tube construction, duplex sensing capability, and rugged flameproof terminal heads. Every thermocouple undergoes stringent quality testing to ensure exceptional accuracy, durability, and long operational life. We also offer customized insertion lengths, sheath materials, process connections, and sensing configurations to meet the specific requirements of diverse industrial applications.
