The DB1 determined level by measuring the pressure required to force bubbles (nitrogen or air) from a pair of submerged tubes. The submerged tubes were separated by a known fixed vertical distance. A single pressure transducer measured each tube and the atmospheric pressure. This technique compensated for temperature effects and long-term drift in the transducer, producing a more accurate measurement. Accuracy was ±0.05% full scale range.
|Accuracy||±0.05% of Full Scale Range|
|Temperature Range||-25° to +50°C|
|Dimensions||14.0 x 10.2 x 12.2 cm (5.5 x 4.0 x 4.8 in.)|
|Weight||3.8 lb (1.7 kg)|
One differential analog channel, one switched excitation output, and three control ports are required.