OTT ecoLog800 3G Groundwater System
Flexible communication
Complete in-well solution
weather applications supported water applications supported energy applications supported gas flux & turbulence applications supported infrastructure applications supported soil applications supported

Overview

The OTT ecoLog 800 3G is a self-contained system for the measurement of water level, temperature, and conductivity in groundwater and surface water applications. It features a complete in-well solution for groundwater measurement and flexible options for remote communications.  The OTT ecoLog800 is installed by simply hanging in an observation well with an inside diameter of 2 (5.08 cm) inches or greater.

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Benefits and Features

  • Remote data transmission via SMS, FTP, HTTP, or e-mail
  • Complete in-well solution where all components are inserted into the groundwater well
  • Battery life up to 10 years with lithium batteries, with alkaline options available. All batteries are field-replaceable without additional tools
  • Robust components deliver long-term measurement accuracy

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Detailed Description

In addition to the measurement sensorics, the system includes everything that is required for data storage and remote transfer and offers flexible options for data transmission. The 3G modem and antenna allows for great versatility in communicating data (HTTP, FTP, SMS...). In addition to the measured data alarm and status messages can also be transmitted.

The compact monitoring system is designed for applications where consistent data with the lowest possible time requirement are demanded. Completely integrated into an observation well or wellhead shaft, the system is secure against vandalism. Battery lifetimes of up to 10 years, high-quality components, as well as status and warning messages for remote diagnosis guarantee long service intervals and low downtime.

The OTT ecoLog 800 3G is is predestined for stations with potential pollution or salt water intrusion. It can be used for groundwater and surface water monitoring.

Specifications

General

  • Output parameters: Water level/pressure, temperature, specific conductivity, salinity, TDS
  • 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)
  • Measured value memory: 4 MB, approx. 500,000 measured values
  • Sampling/storage interval: 5 seconds … 24 hours
  • Installation: In observation wells from 2" on; multi-purpose suspension bracket and suspension brackets for OTT top caps (3", 4", 6") available as accessories
  • Operating temperature: - 30 °C … + 85 °C
  • Storage temperature: -40 °C … +85 °C

Water level measurement (pressure)

Measurement ranges

  • Measuring range: 0-4 m, 0-10 m, 0-20 m, 0-40 m, 0-100 m Water column
  • Resolution: 0.001 m / 0.1 cm / 0.01 ft / 0.1 inch / 0.0001 bar / 0.001 psi
  • Accuracy: ±0.05 % FS
  • Long-term stability: ±0.1 % / year FS
  • Units: m, ft, inch, bar, psi, Pascal

Temperature measurement

  • Measuring range: -25 °C … +70 °C
  • Resolution: 0.01 °C
  • Accuracy: ±0.1 °C
  • Units: °C, °F

Conductivity measurement

  • Measuring range 0 ... 2000 µS/cm
    • Resolution: 1 µS/cm
    • Accuracy: ±1 µS/cm or ± 0.5% of measured value (whichever is higher)
    • Units: µS/cm, mS/cm
  • Measuring range 0.1...100 mS/cm
    • Resolution: 0.01 mS/cm
    • Accuracy: ±0.01 mS/cm or ±1.5% of measured value (whichever is higher)
    • Unit: mS/cm

Power supply

  • Alkaline C cell: 2 x 1.5 V
  • Or lithium type: 1x 3.6 V/13 Ah
  • Or lithium type: 1x 3.6 V/26 Ah
  • Battery life (hourly measurement, one transmission/day)
      • Lithium battery (26 Ah): >10 years
      • Alkaline batteries: > 1 year

Dimensions L x Ø

  • Probe: 317 mm x 22 mm
  • Communication unit: 520 mm x 50 mm
  • System length: 2.0 … 200 m ±1% ±5 cm (cable length incl. communication unit and pressure probe)

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

Type of protection

  • Probe: IP 68
  • Communication unit: IP 67
  • EMC limits Acc. toEC 204/108/EC, ETSI EN 301 486-1/-7, EN 61326-1