Flue and air-duct temperature measurement
These assemblies use a drilled protective tube with a reduced measuring end and a spring-loaded sheathed sensing insert. The larger protective tube and process thread support use in flue and air-duct service. The sensing insert and protective tube are separate components, allowing replacement of the sensing element. A water-resistant aluminum connection head is provided; other head models are available.
Model and element selection
| Model | Elements | Element type | Temperature range | Accuracy class | Nominal pressure | Protective tube material |
|---|
| WRNR-12 | Single | K | 0-800°C | I or II | 9.8MPa | 06Cr18Ni11Ti |
| WRNR2-12 | Dual |
| WRER-12 | Single | E | 0-700°C |
| WRER2-12 | Dual |
Protective tube and connection dimensions
| Reduced section dimensions | Outer sleeve dimensions | Process thread options | Head | Single-element electrical entry | Dual-element electrical entry |
|---|
| 28mm and 16mm diameters; 46mm length | 20mm diameter; 250mm length | ZG2 (2in), NPT2 (2in) or M60x3 | Water-resistant | M20x1.5; 10mm cable | M24x1.5; 16mm cable |
Standard total and insertion lengths
| Total length | Insertion length |
|---|
| 480mm | 230mm |
| 680mm | 430mm |
| 880mm | 630mm |
| 1380mm | 1130mm |
Other specifications can be supplied for the application. Select a total-length and insertion-length pair together.
