The measuring end of this sheathed thermocouple is reduced to 3mm or another required size. The sensing element contacts the measured medium directly. A threaded fixing and reinforced connecting tube join the probe to a small aluminum alloy waterproof head for installation at specific equipment locations.
| Sensor type | Element | Sheath material | Sheath diameter | Range | Class I tolerance | Class II tolerance |
|---|---|---|---|---|---|---|
|
WRNK
Nickel-chromium / nickel-silicon |
K | 06Cr18Ni11Ti | 3mm, 4mm, 5mm or 6mm | 0-800°C | ±1.5°C or ±0.4%t | ±2.5°C or ±0.75%t |
| GH3030 | 3mm, 4mm or 5mm | 0-900°C | ||||
| 6mm | 0-1100°C | |||||
|
WREK
Nickel-chromium / copper-nickel |
E | 06Cr18Ni11Ti | 3mm, 4mm, 5mm or 6mm | 0-700°C | ||
|
WRFK
Iron / copper-nickel |
J | 3mm | 0-400°C | |||
| 4mm, 5mm or 6mm | 0-600°C | |||||
|
WRCK
Copper / copper-nickel |
T | 3mm, 4mm, 5mm or 6mm | -200-300°C | ±0.5°C or ±0.4%t | ±1°C or ±0.75%t |
The table retains the available ranges and tolerances. The body sheath diameter and reduced measuring-tip dimension are separate specifications.
| Sheath diameter | Fixing | Thread choices | Insertion | Head | Electrical entry |
|---|---|---|---|---|---|
| 3mm, 4mm, 5mm or 6mm | Fixed screw thread | M27×2, M33×2 or NPT1/2 | 50-150mm or user-specified | Small aluminum alloy waterproof head | M20×1.5 |
