Robust Industrial Thermocouple Probe Assembly (Type K/N) for High Temperature
Hongtai Industrial Thermocouple Probe assemblies are the workhorse temperature sensors for the most demanding thermal environments. Designed for heavy industry, these probes feature a rugged, modular construction that allows for easy maintenance and extreme durability in temperatures ranging from -200°C up to 1600°C.
Unlike disposable sensors, our Thermocouple assembly type K / N is built to last. It consists of a robust connection head, a customizable protection tube (Sheath), and a replaceable sensing element. This “Assembly” design makes it the preferred choice for boiler plants, industrial furnaces, and MRO professionals who value reliability and low lifecycle costs.
Key Technical Features & Benefits
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Modular “Head-Tube-Element” Design: The core advantage of this Industrial thermocouple probe is its maintainability. If the internal sensor fails, you don’t need to replace the expensive protection tube. Simply unscrew the head and swap the element.
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Extreme Temperature Range: From cryogenic -200°C applications to 1600°C blast furnaces, we offer specific calibrations including Base Metal (Type K, N, E, J) and Noble Metal (Type S, R, B).
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Heavy Duty Protection: Available with Ceramic protection tube thermocouple options (Corundum/High Alumina) for resistance to molten metal and corrosive gases, or stainless steel (SS316/310) for mechanical strength.
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High Temperature Thermocouple Sensor Accuracy: Manufactured to IEC 60584 Class 1 standards, ensuring precise process control for critical boiler and furnace operations.
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Heavy Duty Temperature Probe Construction: IP65/IP67 waterproof connection heads (Types KNE, KNC, KB, KD) protect the electrical terminals from harsh factory environments.
Technical Specifications (WR Series)
| Parameter | Specification | Options |
| Product Type | Industrial thermocouple probe (Assembly) | WRN (K), WRE (E), WRR (B), WRP (S) |
| Calibration | Type K, N, E, J, T | Type S, R, B (Noble Metal) |
| Temp Range | 0°C – 1200°C (Metal Sheath) | 0°C – 1600°C (Ceramic Sheath) |
| Sheath Material | SS304, SS316, SS310 (2520), Inconel 600 | Ceramic protection tube (C799 Corundum) |
| Probe Diameter | 12mm, 16mm, 20mm, 25mm | Custom Heavy Wall |
| Process Connection | Thread (M27x2, NPT), Flange (ANSI/DIN) | Fixed or Adjustable |
| Connection Head | Die-cast Aluminum (IP65) | Explosion Proof (dIIBT4) |
| Element Type | Simplex (2-wire) or Duplex (4-wire) | – |
Deep Dive: Choosing the Right Protection Tube
Selecting the correct sheath for your Industrial thermocouple probe is critical for longevity.
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Stainless Steel (304/316): Ideal for general purpose up to 900°C. Food safe and corrosion-resistant.
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Inconel 600 / SS310: Required for heat treating furnaces up to 1150°C. Resists oxidation.
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Ceramic (Corundum/Alumina): The only choice for a High temperature thermocouple sensor operating above 1200°C. Corundum C799 is 99.7% Al2O3, offering superior resistance to chemical attack and sagging at 1600°C.
Applications in Industry
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Boiler & Power Generation: Monitoring flue gas and steam pipe temperatures.
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Metal Processing: Molten aluminum and steel temperature measurement using ceramic tubes.
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Incinerators: Waste-to-energy plant combustion control.
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Chemical Petrochemical: Reactors and distillation columns requiring Heavy duty temperature probe solutions.
FAQ
Q: Can I replace just the inner element?
A: Yes. This is the main benefit of the Assembly Industrial Thermocouple. We sell replacement inner elements (terminal blocks + wire + ceramic insulators) separately, saving you up to 70% on maintenance costs.
Q: What is the difference between Type K and Type N?
A: Thermocouple assembly type K is the industry standard (0-1200°C). However, Type N (Nicrosil-Nisil) offers better stability and resistance to oxidation at high temperatures (1000°C+), making it a superior upgrade for modern furnaces.
Q: How do I mount this probe?
A: Most industrial probes use a fixed thread (M27x2 is standard in China, 1/2″ NPT in the US) or a standard ANSI flange. We can machine any connection to fit your existing boiler ports.
(See our Mineral Insulated Cables for tighter spaces.
Learn more about Thermocouple Types on Wikipedia.)
