Alumina Ceramics
ORT Series — Ceramic Protection & Insulating Tube
High-purity alumina tubes for thermocouple protection and electrical insulation. 4 grades T92–T997 (Al₂O₃ 92–99.7%), use temp 1390–1700°C, insulation 10 kV/mm. Multi-bore insulating tube and single-bore protection tube variants.
Available sizes
OD 1–5 mm (insulating)OD 5–15 mm (protection)OD 15–25 mm (protection)L up to 2600 mm
Variants
ORT-T92 (1390°C)ORT-T95 (1480°C)ORT-T99 (1600°C)ORT-T997 (1700°C)1, 2, 3 or 4 bores
Performance Index
| Property | ORT-T92 | ORT-T95 | ORT-T99 | ORT-T997 |
|---|---|---|---|---|
| Al₂O₃ (%) | 92 | 95 | 99 | 99.7 |
| Density (g/cm³) | 3.60 | 3.65 | 3.80 | 3.85 |
| Bending strength (MPa) | 304 | 320 | 350 | 370 |
| Max service temp (°C) | 1390 | 1480 | 1600 | 1700 |
| Insulation resistance (kV/mm) | 10 | 10 | 10 | 10 |
| Protection tube OD (mm) | 3–25 | 3–25 | 3–25 | 3–25 |
| Insulating tube OD (mm) | 1–8 | 1–8 | 1–8 | 1–8 |
ORT Series covers two related product families: ceramic protection tubes (single bore) for thermocouples and process sensors, and multi-bore insulating tubes for electrical conductor insulation in high-temperature furnaces.
PROTECTION TUBE DIMENSIONS
• OD: 3–25 mm
• Wall thickness: 0.5–4 mm
• Max length: 2500 mm
INSULATING TUBE DIMENSIONS
• OD: 1–8 mm
• Bore count: 1, 2, 3 or 4 bores
• Max length: 2600 mm
APPLICATIONS
• Thermocouple sheaths in furnaces, kilns, metallurgy
• Electrical conductor insulation in high-temperature equipment
• Laboratory and process measurement
Gallery
