DB1

Double Bubbler Liquid Level Sensor

Retired Product
(not available for purchase)
The DB1 is a self-calibrating system that measures water level (or other liquids), such as measurement in channels and stilling wells. It detects level by measuring the pressure required to force nitrogen bubbles from a pair of submerged tubes. The orifices of the tubes are separated by a fixed vertical distance. The pressure line that is measured is determined by the datalogger, which opens and closes valves on the manifold assembly. A single pressure transducer measures each of the tubes, as well as the atmospheric pressure. This technique compensates for temperature effects and long-term drift in the transducer, producing a more accurate measurement.

Features

  • Self-calibrating system
  • Measures water level (or other liquids) in channels and stilling wells
  • Three models: 0 to 5 psi, 0 to 15 psi, 0 to 30 psi
  • Requires nitrogen tank and regulator

Specifications

  • Accuracy: ±0.05% of Full Scale Range
  • Temperature Range: -25° to +50°C
  • Weight: 3.8 lb (1.7 kg)
  • Dimensions: 5.5" x 4.0" x 4.8" (14.0 x 10.2 x 12.2 cm)