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Bayonet Type Adapters
Adapter Selection and Installation:
- Select an adapter length by comparing the hole depth and thermocouple probe length in Table 1A.
- Select from Table 1B a thread type for the adapter length determined in Table 1A.
Table 1A
Adapter Length for Bayonet Type Thermocouples and RTDs
| Hole “C” | Probe Length A (in) | ||
|---|---|---|---|
| (in) | 7/8″ Long Adapter | 1-3/8″ Long Adapter | 2-1/2″ Long Adapter |
| 1⁄4 to 1⁄2 | 1-5⁄8 | 2 | 3-1⁄8 |
| 1⁄2 to 1 | 2 | 2-1⁄2 | 3-5⁄8 |
| 1 to 1-1⁄2 | 2-1⁄2 | 3 | 4-1⁄8 |
| 2 to 2-1⁄2 | 3-1⁄2 | 4 | 5-1⁄8 |
| 2-1⁄2 to 3 | 4 | 4-1⁄2 | 5-5⁄8 |
| 3 to 3-1⁄2 | 4-1⁄2 | 5 | 6-1⁄8 |
| 3-1⁄2 to 4 | 5 | 5-1⁄2 | 6-5⁄8 |
| 4 to 4-1⁄2 | 5-1⁄2 | 6 | 7-1⁄8 |
| 4-1⁄2 to 5 | 6 | 6-1⁄2 | 7-5⁄8 |
| 5 to 5-1⁄2 | 6-1⁄2 | 7 | 8-1⁄8 |
| 5-1⁄2 to 6 | 7 | 7-1⁄2 | 8-5⁄8 |
| 6 to 6-1⁄2 | 7-1⁄2 | 8 | 9-1⁄8 |
Table 1B
Bayonet Adapter for Threaded Type Thermocouples and RTDs
| Part Number | Length (in) | Thread | Material |
|---|---|---|---|
| TCA-104-101 | 7⁄8 | 1⁄8-27 NPT | Plated Steel |
| TCA-104-103 | 1-3⁄8 | 1⁄8-27 NPT | Plated Steel |
| TCA-104-121 | 1-1⁄2 | 1⁄8-27 NPT | Plated Steel |
| TCA-104-118 | 2 | 1⁄8-27 NPT | Plated Steel |
| TCA-104-105 | 2-1⁄2 | 1⁄8-27 NPT | Plated Steel |
| TCA-104-115 | 3-1⁄2 | 1⁄8-27 NPT | Plated Steel |
| TCA-104-110 | 4 | 1⁄8-27 NPT | Plated Steel |
| TCA-104-102 | 7⁄8 | 3⁄8-24 UNF | Plated Steel |
| TCA-104-104 | 1-3⁄8 | 3⁄8-24 UNF | Plated Steel |
| TCA-104-106 | 2-1⁄2 | 3⁄8-24 UNF | Plated Steel |
| TCA-104-107 | 2-3⁄8 | 14 × 1.5mm | Stainless Steel |
| TCA-104-108 | 2-1⁄2 | 10 × 1.5mm | Plated Steel |
| TCA-104-111 | 2-1⁄2 | 12 × 1mm | Plated Steel |
| †TCA-104-116 | 2-3⁄8 | 12 × 1.5mm | Plated Steel |
| TCA-104-126 | 2 | 12 × 1mm | Plated Steel |
| †TCA-104-127 | 1 | 12 × 1mm | Plated Steel |
| TCA-104-128 | 1 | 12 × 1.75mm | Plated Steel |
| TCA-104-131 | 3 | 12 × 1mm | Plated Steel |
| TCA-104-132 | 5 | 12 × 1mm | Plated Steel |
†Must be used with 12 mm ID bayonet caps
