Vacuum ionization gauge
max. 10 mmTorr | ETI 8140 TELEVAC

The ETI 8140 Nude Ionization Gauge is a flange-mounted, Bayard-Alpert type for the range of 1 x 10-3 to 4 x 10-10 Torr. It is equipped with a bonded thoria, replaceable filament. The grid is of bi-filar construction. A .005"-diameter tungsten collector is provided for a low X-ray limit. The ETI 8140 is suited to either the I2R or the electron bombardment method of electrode degassing, making it compatible with either type of controller. This gauge may be baked to 450°C.

Operating Data
Sensitivity for N2 : 10/Torr
X-ray Limit : 4 x 10-10 Torr
Operating Pressure : 4 x 10-10 to 1 x 10-3 Torr
Electron Bombardment Degas : 70 Watts
Resistance Heated Degas : 6.3 to 7.5 volts @ 10 amps
Bake-out Temperature : 450°C