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Help CenterK-Type Thermocouple Pt100 Temperature Sensor Explosion-proof Temperature Transmitter
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The thermocouple is a self-powered temperature sensor that generates a voltage signal proportional to temperature differences between its two junctions. Utilizing the Seebeck effect principle, they generate self-powered voltage signals proportional to temperature gradients. Comprising two dissimilar metal wires (e.g., nickel-chromium, platinum-rhodium) joined at one end (the hot junction), it measures temperatures from –200°C to 2,315°C, making it ideal for extreme environments where other sensors fail.
Widely used in industries like plastics processing, aerospace, and pharmaceuticals, thermocouples offer interchangeability, rapid response times, and robustness against vibrations and corrosion.
Core Features:
Wide Temperature Range: Covers cryogenic to ultra-high temperatures (e.g., Type C: 0–2,315°C; Type K: –200–1,200°C).
Self-Powered Operation: Generates millivolt signals without external power.
Durability: Resistant to mechanical stress, oxidation, and chemical corrosion (e.g., Type J for vacuum/reducing atmospheres).
Versatility: Available as bare wires, sheathed probes (IP67), or micro-sensors for catheters and turbines.
Thermocouple Types & Ranges:
| Type | Materials (+/-) | Temp. Range | Accuracy (±) | Atmosphere Suitability |
| K | Ni-Cr / Ni-Si,Ni-Al | -200°C to +1200°C | ±1.5°C or±0.4 % | Oxidizing |
| J | Fe / Cu-Ni | -40°C to +750°C | ±1.5°C or ±0.4 % | Vacuum, Reducing |
| E | Ni-Cr / Cu-Ni | -200°C to +900°C | ±1.5°C or ±0.4 % | Oxidizing, Inert |
| N | Ni-Cr-Si / Ni-Si | -200°C to +1300°C | ±1.5°C or ±0.4 % | Oxidizing |
| T | Cu / Cu-Ni | -270°C to +400°C | ±1.5°C or ±0.4 % | Inert, vacuums |
| S | Pt-10%Rh / Pt | 0°C to +1600°C | ±1°C or ±0.25 % | Inert, Oxidizing |
| R | Pt-13%Rh / Pt | 0°C to +1600°C | ±1°C or ±0.25 % | Inert, Oxidizing |
| B | Pt-30%Rh / Pt-6%Rh | +250°C to +1700°C | ±0.5°C or ±0.25 % | High-Temp Oxidizing |
| C | W-5%Re / W-26%Re | 0°C to +2315°C | ±2.5°C or ±0.15 % | Hydrogen, Vacuum |
Customized types are acceptable, such as Ni-Cr/Au-Fe thermocouple
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