OTT HydroMet

- Model CBS - Compact Bubbler Sensor

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The OTT CBS is a compact, accurate, and low power bubbler sensor for surface water level monitoring. The OTT CBS meets or exceeds USGS standards for accuracy, and will not drift over time. It features outputs for SDI-12 and 4...20 mA.

  • Application: Surface water, Groundwater
  • Measurement technology: Bubbler-in
  • Product Highlights: Drift-free water level measurement - no pressure sensor or electronics in the water
  • Measurement range: 0 to 15 m or 0 to 30 m
  • Accuracy: ± 3 mm (high accuracy version); ± 5 mm (standard and 30 meter versions)
  • Internal data logger: No
  • Interface: SDI-12, RS-485 (using SDI-12), or 4 ...20 mA

For water level measurement of:

  • Streams, rivers, channels, or canals
  • Groundwater wells
  • Reservoirs, lakes, and wetlands

Ideal for monitoring:

  • Continuous water level networks
  • Lightning prone areas
  • Channels with long, flat embankments

  • Accurate—Meets and exceeds USGS guidelines for water level accuracy, and will not drift over time
  • Complete Solution—Combining the CBS with an EPS-50 bubble chamber reduces the influence of wave action and prevents unnecessary noise in your data
  • Low Maintenance—No desiccant, pump maintenance, or lubrication required
  • Easy-to-Start/Install—All programming can be completed using DIP switches; connect into existing platforms using 3/8' O.D. or 4mm O.D. measuring tube (no adapters required)
  • Compact Size—small and powerful pump motor generates the required volume of air to perform measurement.
  • Low Power—Intelligent pumping strategy compares the previous measurement to the actual pressure at the current measurement, and optimizes the pumping time depending on the difference (i.e., small changes in level are measured with very short pump cycles)

  • Measuring Range :
    • Version ''Standard'' and ''USGS specification'' : 0 ... 15 m (0...50 ft)
    • Version ''30 m measuring range'' : 0 ... 30 m (0...100 ft)
    • Resolution : 1 mm (0.01 ft)
    • Accuracy :
    • Version ''Standard'' and ''30m measuring range'' : ±5 mm
    • Version ''USGS specification'' : 0 ... 15 ft: ±0.01 %
    • 15 ... 50 ft: ±0.065 % of measurement value or 0.02 ft, whichever if less
    • Units : m, ft, bar, PSI
  • Electrical Data :
    • Interfaces : 4 ... 20 mA, SDI-12, SDI-12 via RS-485
    • Power supply : 10 ... 30 V DC, typ. 12/24 V DC
  • Current Consumption:
    • Measuring interval 1 min : typ. 320 mAh/day
    • Measuring interval 15min : typ. 25 mAh/day
  • Housing material : ABS
  • Dimensions L x W x H : 165 mm x 205 mm x 115 mm
  • Weight : approx. 1,500 g
  • Protection class : IP43
  • Environmental conditions :
    • Operating temperature : -20 ... +60 °C
    • Storage temperature : - 40 ... +85 °C
    • Relativ air humidity : 10 ... 95 %; not condensing
  • Measuring tube : inner diameter typ. 2 mm or 4 mm
  • EMV - limit values : According to IEC61326 and EN61326

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