Hongnuo (shenyang) General Machinery Co., Ltd. is one of the most reliable manufacturers and suppliers of thermocouple type temperature sensor in China. Welcome to buy high quality thermocouple type temperature sensor at competitive price from our factory. We also accept customized orders.
Products Description
| Parameter | Specification |
|---|---|
| Probe Rod Length: | 0~300 mm, customizable |
| Probe Diameter: | φ6 mm / φ8 mm / φ16 mm / φ20 mm / φ25 mm, customizable |
| Medium Temperature Range: | -50 ~ +600 °C (-58 ~ 1112 °F), customizable |
| Explosion-proof Rating: | Exd IIB T1-T6, Exd IIC T1-T6, Ex ia IIB T1-T6, Ex ia IIC T1-T6 |
| Probe Rod Material: | 304 stainless steel, 316 stainless steel |
Please see the Specifications for more details.
Typical Applications
Thermal Power and Thermal Energy Industry
Main steam pipeline temperature measurement: This application is specifically highlighted in the manual. The HNT30 utilizes a corundum (temperature resistant up to 1800°C) or high-alumina protective tube paired with a Type B or S thermocouple; capable of withstanding high-temperature, high-pressure steam (pressure <20 MPa) over the long term, it is used for temperature monitoring and interlocking protection at the outlets of boiler superheaters and reheaters.
Chemical and Petrochemical Industries
High-temperature reactors and cracking furnaces: The HNT30 offers an optional GH3030 alloy protective tube (temperature resistant up to 1100°C), making it suitable for temperature monitoring in process stages such as hydrocarbon cracking and catalytic reforming involving highly corrosive or oxidizing atmospheres.
Metal Smelting and Heat Treatment
Smelting and annealing furnace chamber temperatures: With an upper measurement limit of 1600–1800°C, the unit employs a Type B or S thermocouple paired with a double-layer ceramic sleeve (Φ25 mm). It is capable of long-term operation in oxidizing or neutral atmospheres and is used for furnace temperature uniformity testing and combustion control.
Why Choose HNT30 ?
For ultra-high temperatures (>1100°C), a dual-layer ceramic sleeve (Φ25 mm) is employed; the air gap between the inner and outer tubes utilizes low thermal conductivity to retard heat transfer, thereby keeping the inner tube approximately 200–300°C cooler than the outer wall-reducing the oxidation rate of the thermoelectrode and extending service life.
An integrated NTC sensor provides real-time terminal temperature measurement, applying compensation to the 0°C reference junction with an error of approximately ±0.5°C. When equipped with a transmitter, thermocouple non-linearity is corrected via piecewise interpolation or polynomial fitting, yielding a linear 4–20 mA output that eliminates the need for secondary lookup tables.
Ex d (Flameproof): The housing withstands internal explosions and quenches flames; suitable for Zone 1/2.
Ex ia (Intrinsically Safe): Circuit energy is limited to safe levels; suitable for Zone 0/1, allowing for live maintenance.
Rated for Gas Group IIC (hydrogen/acetylene) and Temperature Classes T1–T6 (maximum surface temperature ≤85°C).
IP65/IP67 all-metal sealed construction; suitable for outdoor use, washdown areas, and high-dust environments.
Key Advantages
- Wide operating temperature range
- Stepped thermowell material
- Double-layer ceramic sleeve
- Rapid thermal response
- Selectable accuracy
- Optional HART protocol
- Comprehensive explosion-proof certifications
- High ingress protection rating
- Flexible installation methods
- Optional special features
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HNT30 Armored Temperature Sensor |
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Specific Parameters |
Value / Description |
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Measurement Principle |
HNT30 armored temperature sensor (usually armored thermocouple or thermal resistor) works based on the thermoelectric effect or the principle of resistance change with temperature. Its core is to encapsulate the temperature sensing element within a metal protection tube, filled with insulating material inside, generating a weak thermoelectric potential (thermocouple) or resistance change (thermal resistor) due to external temperature difference, achieving high precision and fast response temperature measurement. |
|
Application |
1. High-temperature measurement in industrial processes, suitable for liquids, steam, gases, and fixed surface temperatures. |
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Probe Rod Length |
0~300mm, Beyond Customizability |
|
Probe Diameter |
φ6mm/φ8mm/φ16mm/φ20mm/φ25mm, customizable |
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Minimum Sensor Insertion Depth |
>8D (D is the outer diameter of the protective tube) |
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Probe Rod Material |
316 |
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Protective Tube Material |
Corundum, high-aluminum, GH3030 alloy, 321 stainless steel, 310 stainless steel, 304 stainless steel, 316 stainless steel, customizable. |
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Connection Method |
Threaded/ Chuck connection |
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Accuracy |
|
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Pressure Withstand Capacity |
<20MPa (The uncertainty is influenced by the protection tube material, diameter, and wall thickness) |
|
Temperature Range |
-50 ~ +600 °C ( -58 °F ～ 1112 °F) Customizable |
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Accuracy Grade |
Level I Level II |
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Outputs |
4-20mA/PT100 |
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Protection Level |
IP65/IP67 |
|
Electrical Connection |
M12*1.5,M16*1.5,M27*2,G1/2,G3/4,1/2NPT |
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Power Supply |
DC 24V |
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Product Safety |
CE certified |
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Functional Safety |
Complies with IEC 61508 standard, allowing use in safety applications specified in IEC 61511 standard |
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Explosion-proof Certification |
Explosion-proof certificate |
