Description
Duplex Thermocouple Sensor is a high-performance dual-element K-Type temperature sensor designed for continuous industrial processes where uninterrupted temperature monitoring is essential. Featuring two independent thermocouple sensing junctions housed within a single SS316 stainless steel sheath, this sensor provides operational redundancy, helping reduce unexpected downtime and improve maintenance planning in critical industrial applications.
Unlike simplex thermocouples, a Duplex Thermocouple Sensor allows operators to switch from the primary sensing element to the secondary element if one junction reaches the end of its service life. This enables continued process operation while a replacement sensor is scheduled, minimizing production interruptions and maintenance costs.
The AKFD is constructed with a 6 mm SS316 stainless steel sheath that provides excellent corrosion resistance and mechanical durability in demanding industrial environments. With a 2200 mm insertion length, it is ideally suited for medium- to long-reach applications in furnaces, boilers, reactors, and industrial process equipment.
For hazardous installations, the thermocouple is fitted with a rugged flameproof die-cast aluminium terminal head featuring IP67 protection, ensuring safe operation in environments where explosive gases or dust may be present. The double cable entry simplifies independent wiring for each sensing element and supports reliable integration into industrial control systems.
Key Features
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Dual-Signal Duplex Calibration Houses two completely independent K-type junctions inside one probe for simultaneous control and high-limit safety routing.
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Optional Spring-Loaded Architecture Enables fast, direct field replacement into existing factory thermowells, ensuring firm contact against the inner tip.
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High-Purity Compacted MgO Core Deeply compressed mineral powder provides top-tier electrical isolation and superior mechanical vibration damping.
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Explosion-Proof IP67 Aluminum Enclosure Heavy-duty flameproof terminal head isolates internal wiring connections to safely protect classified hazardous zones.
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Double Cable Entry Configuration Integrated dual-port hub layout allows electrical teams to run separate, fully isolated conduit wiring channels.
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Extended 3200 mm Long-Reach Insertion Aavad’s longest standard duplex MI layout, optimized for deep cracking towers, large kilns, and tall exhaust stacks.
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Rigid 8 mm SS316 Protective Sheath Marine-grade stainless casing ensures excellent structural stiffness and outstanding resistance to corrosion up to 650°C.
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Self-Powered Thermoelectric Signal Requires zero external excitation voltage to transmit linear millivolt loops directly to control room PLCs.
Applications
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Deep Distillation Columns and Petrochemical Cracking Dual-loop temperature control inside explosive gas environments and large refinery storage tanks.
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Utility Power Plant Boilers and Steam Lines Simultaneous control-room logging and safety-interlock tracking within high-velocity steam headers.
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Hazardous-Area Waste Incinerators and Furnaces Long-reach process mapping inside hazardous stacks requiring continuous safety redundancy.
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Gas Turbine Exhausts and Engine Test Blocks High-vibration monitoring of turbulent manifolds where sensor failure requires instant backup loop switching.
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Refractory Wall Insulation and Deep Kiln Core Loops Deeply tracking thick insulation boundaries and high-capacity manufacturing ovens.
Datasheet
FAQs
1. What is a Duplex Thermocouple Sensor?
A Duplex Thermocouple Sensor is an industrial temperature sensor containing two independent sensing elements housed inside a single protective sheath. This dual-element design provides redundant temperature measurement, allowing one sensing element to continue operating if the other fails, thereby improving process reliability and reducing unplanned downtime.
2. Why choose a Duplex Thermocouple instead of a Simplex Thermocouple?
A Duplex Thermocouple minimizes process interruptions by incorporating a spare sensing element within the same sensor assembly. When the primary junction reaches the end of its service life, operators can switch to the secondary junction without immediately replacing the thermocouple, reducing maintenance costs, production downtime, and equipment shutdowns.
3. Where are Duplex Thermocouple Sensors used?
Duplex Thermocouple Sensors are widely used in power plants, petrochemical facilities, industrial furnaces, boilers, heat treatment systems, chemical processing plants, refineries, continuous manufacturing lines, steel industries, cement plants, and hazardous industrial environments where continuous process reliability and accurate temperature monitoring are essential.
4. Why Choose Aavad Instrument Duplex Thermocouple Sensors?
Aavad Instrument Pvt. Ltd. Duplex Thermocouple Sensors are precision-engineered using premium-quality materials and advanced manufacturing techniques to deliver exceptional accuracy, durability, and long operational life. Every sensor undergoes stringent quality testing to ensure reliable performance in demanding industrial environments. We offer customized sheath materials, insertion lengths, process connections, thermocouple types, terminal head configurations, and application-specific designs to meet diverse industrial requirements.
