The 75 Series glass gauge tubes are Bayard-Alpert type with an operating range of 2 x 10-10 torr to 1 x 10-3 torr. The 75 Series is of rugged construction, will tolerate long outgassing cycles, and incorporates the twin tungsten filaments which can be switched without breaking vacuum, with most commercial controllers.
| SPECIFICATIONS | |
|---|---|
| Twin tungsten filaments | |
| Grid | + 180 VDC to grid (Ground) |
| Collector | 0 VDC (Collector) |
| Filament | + 30 VDC to ground (filament) |
| Sensitivity | 100 microamps per micron at 10 mA grid current (nitrogen) |
| X-Ray Limi | 2 x 10-10 torr |
| PART NUMBER | DESCRIPTION |
|---|---|
| IG-75-NTT | 3/4” Nonex® Tubulation |
| IG-75-PTT | 3/4” Pyrex® Tubulation |
| IG-709-NT | .709 Nonex® Tubulation |
| IG-75-KTT | 3/4” Kovar® Tubulation |
| IG-100-NTT | 1" Nonex® Tubulation |
| IG-100-PTT | 1" Pyrex® Tubulation |
| IG-100-KTT | 1" Kovar® Tubulation |
| IG-100-KTTF | 1" Tube to 2-3/4" OD MET-SEAL |
| IG-100-KTT-KF25 | 1" Tube to NW-25 |
| IG-100-KTT-KF40 | 1" Tube to NW-40 |
Note: All gauges are calibrated for nitrogen; for gases other than nitrogen, see chart below:
| GAS | MULTIPLY READING BY |
|---|---|
| Argon | 0.72 |
| Helium | 6.06 |
| Hydrogen | 2.40 |
| Krypton | 0.52 |
| Neon | 3.36 |
| Water Vapor | 1.40 |
| Xenon | 0.35 |
