This product is no longer available and has been replaced by: CS475A-L. Some accessories, replacement parts, or services may still be available.
DB1 Double Bubbler Liquid Level Sensor


 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)


Datalogger Considerations

One differential analog channel, one switched excitation output, and three control ports are required.

Compatible Contemporary Dataloggers

CR200(X) Series CR800/CR850 CR1000 CR3000 CR9000X

Compatibley Retired Dataloggers

CR500 CR510 CR10 CR10X 21X CR23X CR9000 CR5000 CR7X