These direct-contact sheathed thermocouples offer K, E, J or T sensing elements and extension or compensating leads. Select direct leads, compact pressure-contact terminals or a flexible-tail connection. Stainless steel flexible hose versions integrate a connector with the protected lead assembly. Spring-adjusted cap mounting is available for rubber and plastics machinery.
| Sensor type | Element | Sheath material | Diameter | Temperature range | Class I tolerance | Class II tolerance |
|---|---|---|---|---|---|---|
| WRNK Nickel-chromium / nickel-silicon | K | 06Cr18Ni11Ti | 2mm | 0-600°C | ±1.5°C or ±0.4%t | ±2.5°C or ±0.75%t |
| 3mm, 4mm, 5mm, 6mm or 8mm | 0-800°C | |||||
| GH3030 | 3mm, 4mm or 5mm | 0-900°C | ||||
| 6mm or 8mm | 0-1100°C | |||||
| WREK Nickel-chromium / copper-nickel | E | 06Cr18Ni11Ti | 2mm | 0-500°C | ||
| 3mm, 4mm, 5mm, 6mm or 8mm | 0-700°C | |||||
| WRFK Iron / copper-nickel | J | 2mm or 3mm | 0-400°C | |||
| 4mm, 5mm, 6mm or 8mm | 0-600°C | |||||
| WRCK Copper / copper-nickel | T | 2mm, 3mm, 4mm, 5mm, 6mm or 8mm | -200-300°C | ±0.5°C or ±0.4%t | ±1°C or ±0.75%t |
| Configuration | Mounting | Thread selection | Lead arrangement |
|---|---|---|---|
| Direct lead | No fixed mounting | None | Extension or compensating lead |
| Compact terminal | Fixed double-ended threaded fitting | NPT1/2, G1/2 or M20x1.5; thread length specified for application | Pressure-contact terminals; extension or compensating lead |
| Flexible tail | Adjustable cap-thread mounting | Thread size and length specified for application | |
| Metal hose with cap | Spring-adjusted cap mounting | Not specified | Stainless steel hose and integrated connector |
| Metal hose without fixed mounting | No fixed mounting | None | |
| Metal hose with threaded ferrule | Fixed or adjustable compression fitting | M12x1.5 or M16x1.5, according to diameter |
| Sheath diameter | Insertion length | Compensation lead length |
|---|---|---|
| 2mm | Specified for the application | User specified |
| 3mm | 50-15000mm | |
| 4mm | 50-10000mm | |
| 5mm | 50-4000mm | |
| 6mm | 75-4000mm | |
| 8mm | 100-2500mm |
| Sheath diameter | Thread | Thread length | Hexagon across flats |
|---|---|---|---|
| 5mm, 6mm or 8mm | M16x1.5 | 15mm | 22mm |
| 2mm or 3mm | M12x1.5 | 19mm | |
| 4mm, standard selection | |||
| 4mm, alternative bracketed selection | M16x1.5 | 22mm |
Specify the alternative bracketed 4mm fitting when required. The fixed ferrule is listed at 2.5MPa; this value is not a pressure rating for every mounting configuration.
