Flexible Wiring & Fast Response: The Wire Thermocouple for Compact Spaces
The Platinum-rhodium thermocouples (also known as the soft-lead thermocouple) is a lightweight temperature-sensing solution designed for versatility in tight spaces and mobile applications. Its core advantage lies in the direct connection between the sensing tip and flexible insulated wires, making the Platinum-rhodium thermocouples incredibly easy to route and install where traditional rigid sensors can't reach. By leveraging the thermoelectric effect of dissimilar metal electrodes, the Platinum-rhodium thermocouples delivers rapid, reliable readings across a wide range (-200℃~800℃), catering to needs from electronic device monitoring to laboratory small-scale testing. Whether for multi-point temperature checks or hard-to-access gaps, this sensor combines convenience and performance seamlessly.
Versatile Platinum-rhodium thermocouples Types for Targeted Needs
The Platinum-rhodium thermocouples family is classified by sensing tip structure and lead characteristics to match diverse application scenarios. Below is a detailed breakdown:
|
Type |
Structural Features |
Key Advantages |
Suitable Applications |
|
Bare-Tip Wire Thermocouple |
No protective sleeve, exposed electrodes |
Ultra-fast response (milliseconds) |
Clean, non-corrosive gas/liquid media; avoid abrasive/corrosive environments |
|
Micro Protective Tube Wire Thermocouple |
Thin-walled stainless steel/ceramic tube on tip |
Balances response speed and mild corrosion resistance |
Customizable lead lengths (0.5~10m) for varied wiring distances |
|
Patch-Type Wire Thermocouple |
Ultra-thin patch sensing tip, flexible leads |
Adheres tightly to small surfaces via high-temperature adhesive |
Circuit boards, small molds, and micro-component surface temperature measurement |
|
Multi-Core Wire Thermocouple |
Multiple thermocouple cores integrated in one lead |
Measures multiple points simultaneously, reduces wiring |
Multi-point temperature inspection scenarios (e.g., equipment arrays, laboratory setups) |
Premium Materials & Reliable Precision of Platinum-rhodium thermocouples
Every Platinum-rhodium thermocouples is built with high-quality materials to ensure durability and accuracy. Its thermoelectrodes include cost-effective K-type (NiCr-NiSi) and E-type (NiCr-CuNi) for medium-low temperatures, plus high-precision S-type (PtRh10-Pt) for 300~800℃ high-temperature tasks.
Soft lead insulation materials are tailored to temperature: PVC/PE for ≤200℃, PTFE for 200~500℃ (acid/alkali resistant), and glass fiber braid for 500~800℃ (high-temperature resistant, flame-retardant). Micro protective tubes use 304 stainless steel (dry environments) or corundum ceramic (high-temperature harsh conditions).
Following national standards, the Platinum-rhodium thermocouples offers Class Ⅰ and Ⅱ accuracy:
|
Index Number |
Accuracy Class |
Temperature Range (℃) |
Allowable Error |
|
K-type |
Class Ⅰ |
-40~1100 |
±1.5℃ or ±0.4% t |
|
Class Ⅱ |
-40~1100 |
±2.5℃ or ±0.75% t |
|
|
E-type |
Class Ⅰ |
-40~800 |
±1.5℃ or ±0.4% t |
|
Class Ⅱ |
-40~800 |
±2.5℃ or ±0.75% t |
|
|
S-type |
Class Ⅰ |
0~800 |
±1.0℃ or ±0.3% t |
|
Class Ⅱ |
0~800 |
±1.5℃ or ±0.5% t |
Note: t refers to the measured temperature value; bare-tip models may have slightly higher errors due to no protection. Ideal for electronics, small equipment, portable devices, and narrow spaces, the Platinum-rhodium thermocouples stands out as a flexible, user-friendly solution for modern temperature measurement needs.
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