These probes use stainless steel flameproof heads and an internal ferrule that seals around the sheathed insert to limit oil or gas leakage if the outer protective tube wears. They are intended for flowing particles, liquids or gases in CFB furnaces, incinerators and refinery processes. Select N protection with a Ni60WC40 wear coating, or Z protection with a solid drilled corrosion-resistant, wear-resistant and heat-resistant alloy head.
| Mounting | Element | Single-element model | Dual-element model |
|---|---|---|---|
| Fixed thread | N | WRNK-241-dcP1□ | WRNK2-241-dcP1□ |
| K | WRKK-241-dcP1□ | WRKK2-241-dcP1□ | |
| E | WREK-241-dcP1□ | WREK2-241-dcP1□ | |
| Pt100 | WZPK-240-dcP1□ | WZPK2-240-dcP1□ | |
| Fixed flange | N | WRNK-441-dcP1□ | WRNK2-441-dcP1□ |
| K | WRKK-441-dcP1□ | WRKK2-441-dcP1□ | |
| E | WREK-441-dcP1□ | WREK2-441-dcP1□ | |
| Pt100 | WZPK-440-dcP1□ | WZPK2-440-dcP1□ |
The final □ denotes protective-tube material selection: Z for the solid drilled alloy wear head, or N for the coated wear-resistant construction.
| Element | Mounting family | Model operating range | Response t0.5 |
|---|---|---|---|
| N or K | 24x threaded or 44x flanged | 0-1280°C | ≤90s |
| E | 0-800°C | ||
| Pt100 | 0-500°C |
Both large-head configurations offer single or dual 3mm, 4mm, 5mm, 6mm or 8mm sheathed inserts, or assembled inserts. Electrical entries are M20x1.5, M22x1.5 or NPT1/2. The wear head is 300mm long with hardness HRC62-70. Diameter designations are φ20+1.5mm for suffix1 and φ16+1.5mm for suffix0; other dimensions are optional. The common flange connection dimension is 105mm with a B-type sealing face. The listed marking for these configurations is ExdIICT1-T6.
Total/insertion length pairs are 300/150mm, 350/200mm, 450/300mm, 500/350mm, 550/400mm, 600/450mm, 750/600mm, 900/750mm, 1150/1000mm, 1250/1100mm, 1400/1250mm, 1650/1500mm, 1750/1600mm, 2000/1850mm and 2150/2000mm.
| Selection | FL configuration |
|---|---|
| Connection head | Small stainless steel P2 or large stainless steel P1 |
| Electrical entry | M20x1.5, M22x1.5 or NPT1/2 |
| Wear-head hardness | HRC62-70 |
| Nominal pressure | Threaded connection: 10MPa; flanged connection: 2.5MPa |
| Insert | Single or dual; 3mm, 4mm, 5mm, 6mm or 8mm |
| Listed enclosure options | IP65; ExdIIBT4-T5 or ExdIICT1-T6 |
| Sensor type | Applicable configuration | Element | Interval | Tolerance |
|---|---|---|---|---|
| N: Nickel-chromium-silicon / nickel-silicon-magnesium K: Nickel-chromium / nickel-silicon |
Large P1 and FL | N or K | -40-1200°C | II: ±2.5°C or ±0.75%|t| |
| Nickel-chromium / copper-nickel | E | -40-900°C | ||
| Iron / copper-nickel | FL | J | -40-750°C | |
| Copper / copper-nickel | T | -40-350°C | II: ±1°C or ±0.75%|t| | |
| S: Platinum-10% rhodium / platinum R: Platinum-13% rhodium / platinum |
S or R | 0-600°C | II: ±1.5°C | |
| 600-1600°C | II: ±0.25%|t| | |||
| Platinum-30% rhodium / platinum-6% rhodium | B | 600-1700°C | II: ±1.5°C or ±0.25%|t| | |
| Platinum RTD | Large P1 and FL | Pt100 | -200-500°C | A: ±(0.15+0.002|t|)°C; B: ±(0.30+0.005|t|)°C |
| Copper RTD | FL | Cu50 or Cu100 | -50-100°C | ±(0.30+0.006|t|)°C |
Apply the selected model's operating range and element accuracy interval together. The large P1 N/K model's 1280°C operating limit does not extend its Class II tolerance beyond 1200°C. Use the larger fixed or temperature-dependent tolerance where alternatives are given.
