This dual-element RTD design places a sheathed sensing element directly in the measured medium. It has no fixed mounting device and uses direct leads. The cold-end joint is silver-copper welded and fitted with a buffer spring. Pt100 platinum or Cu50/Cu100 copper resistance elements are available for equipment temperature measurement.
| Sensor type | Element | Sheath material | Diameter | Range choices | Accuracy or tolerance | Measuring current limit |
|---|---|---|---|---|---|---|
|
WZPK
Platinum RTD |
Pt100 | 06Cr18Ni11Ti | 3mm | -200-250°C or -200-420°C | Class A or B | A: ≤2mA; B: ≤5mA |
| 4mm, 5mm, 6mm or 8mm | -200-420°C or 0-500°C | |||||
| 3YC-52 alloy | 0-650°C | |||||
|
WZCK
Copper RTD |
Cu50 or Cu100 | 06Cr18Ni11Ti | 5mm, 6mm or 8mm | -50-150°C | ±(0.30+0.006t)°C | ≤5mA |
For the copper tolerance expression, t is the absolute temperature magnitude in °C.
| Diameter | Cold-end joint | Insertion | Lead length |
|---|---|---|---|
| 8mm | Silver-copper welding | 100-2500mm | User-specified |
| 6mm | 75-2000mm | ||
| 5mm | 75-1500mm |
The sensing table also lists 3mm and 4mm Pt100 options; insertion dimensions are specified for 5mm, 6mm and 8mm only.
