OTT HydroMet

- Model ecoLog 800 - Water Level Logger

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The OTT ecoLog 800 is a self-contained system for measurement of water level, temperature, and conductivity in groundwater and surface water applications. The ecoLog 800 features a complete in-well solution for groundwater measurement and flexible remote data transmission options.

  • Application: Surface water, Groundwater
  • Measurement technology: Vented pressure cell and 4-electrode graphite conductivity cell
  • Parameters measured: Waterlevel/Pressure, Water temperature, Conductivity
  • Product Highlights: Measures, stores, and transmits water level and temperature data
  • Measurement range: 0 … 4, 10, 20, 40, and 100 m
  • Accuracy: ± 0.05% FS
  • Internal data logger: Yes

  • Remote data transmission: receive data, status messages, and low power warnings from the office via SMS, FTP, HTTP, and e-mail, eliminating field visits for data download and troubleshooting
  • Complete in-well solution: all components are inserted into the groundwater well, eliminating the possibility of instrument vandalism
  • Battery life: up to 10 years with lithium batteries, alkaline options are also available. All batteries are field-replaceable without additional tools
  • Long-term accuracy: a robust ceramic pressure cell will not deform over time, and an accurate 4-electrode conductivity measuring cell provides outputs for salinity and total dissolved solids (TDS)
  • User-friendly interaction: only one program required to setup unit and download data, plus a simple infrared communication interface that provides easy on-site data download

Continuous or real-time water level, temperature, and conductivity measurement of:

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

Ideal for monitoring:

  • Continuous water level / water quality networks
  • Short-term or long-term projects
  • Salt water intrusion
  • Aquifer storage and recovery

  • Water level measurement:
    • Measuring range: 0 ... 4 m, 10 m, 20 m, 40 m, 100 m
    • Accuracy: ±0.05 % FS
    • Long-term stability: ±0.1 % / year FS
    • Resolution: 0.001 m / 0.1 cm / 0.01 ft / 0.1 inch / 0.0001 bar / 0.001 psi
    • Units: m, ft, inch, bar, psi, Pascal
  • Temperature measurement:
    • Measuring range: -25 °C ... +70 °C
    • Accuracy: ±0.1 °C
    • Resolution: 0.01 °C
    • Units: °C, °F
  • Conductivity measurement:
  • Measuring range: 0 ... 2000 µS/cm
    • Accuracy: ±1 µS/cm or ±0.5 % of measured value (whichever is higher)
    • Resolution: 1 µS/cm
    • Units: µS/cm, mS/cm
  • Measuring range: 0.1 ... 100 mS/cm
    • Accuracy: ±0.01 mS/cm or ±1.5 % of measured value (whichever is higher)
    • Resolution: 0.01 mS/cm
    • Unit: mS/cm
  • Electrical data:
  • Power supply:
    • Alkaline C cell: 2 x 1.5 V (only for version with GSM/GPRS-Modem)
    • Lithium type: 1 x 3.6 V/13 Ah or
    • 1 x 3.6 V/26 Ah
  • Battery life (hourly measurement, one transmission/day)
    • Lithium battery (26 Ah): >10 years
    • Alkaline batteries (only for version with GSM/GPRS-Modem): > 1 year
  • Modem: GSM/GPRS 900/1800, 850/1900 MHz
  • GSM/GPRS; UMTS/HSPA+
  • 900/1800, 850/1900 MHz; 800/850,
  • 900, AWS 1700, 1900, 2100 MHz
    • Antenna: Built-in; robust and weather-proof, external antenna optionally available (SMA-m)
    • Communication interface: Infrared (IrDA)
  • Data logger:
    • Measured value memory: 4 MB, approx. 500,000 measured values
    • Sampling/storage interval: 5 seconds ... 24 hours
  • Installation: ≥ 2'
    • System length: 2.0 m ... 200 m ±1 % ±5 cm (cable length incl. communication unit and pressure probe)
  • Dimensions L x Ø:
    • Probe: 317 mm x 22 mm
    • Communication unit: 520 mm x 50 mm
  • Weight:
    • Probe: Approx. 0.43 kg
    • Communication unit: Approx. 0.92 kg (incl. batteries)
  • Housing material:
    • Probe: Stainless steel (DIN 1.4539, 904 L?)
    • Communication unit: Aluminium, PA-GF
  • Environmental conditions:
    • Operating temperature: -30 °C ... +85 °C
    • Storage temperature: - 40 °C ... + 85 °C
  • Type of protection:
    • Probe: IP68
    • Communication unit: IP67
  • EMC limits: Acc. to EC 204/108/EC, ETSI EN 301 486-1/-7, EN 61326-1
  • EN 60950-1:2006 + A11:2009 + A1:2010

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