BAG055 is a compact passive Bayard-Alpert hot cathode gauge head used with the VGC083A controller. It supports electron bombardment degassing and comes with many flange options for direct replacement in tight spaces.
| Measuring System | Hot cathode ionization (Bayard-Alpert) |
| Measuring Range | 1.3×10⁻⁹ … 6.7×10⁻² mbar |
| Accuracy | ±15% |
| Bakeout | 200 °C |
| Material (filament) | Dual yttria coated iridium |
| Flange Connection | DN 16·25·40 ISO-KF / DN 16·40 CF-R / 8 VCR female |
| Compatible Controller | VGC083A |
| X-Ray Limit | 5×10⁻¹⁰ Torr |
| Repeatability | ±5% (N₂, typical) |
| Sensitivity | 10 Torr⁻¹ (N₂, typical) |
| Overall Length | 2.7…3.8 in. (depending on flange) |