The MBA2-200 hot filament gauge is the smallest Bayard-Alpert ionization gauge (less than 5% of the volume of a glass gauge). This gauge has an all-metal design that eliminates the possibility of breakage. It generates low heat and provides good burnout resistance.

The MBA2-200’s unique dual ion collectors provide measurement up to 5 x 10^-2 Torr (6.7 x 10^-2 mbar) and it has an X-ray limit equivalent to a glass gauge (3 x 10^-10 Torr, 4 x 10^-10 mbar). Dual, burn-out resistant, yttria-coated iridium filaments provide long life, and help avoid unscheduled downtime. In addition, the gauge requires only 8% of the power of a glass gauge.