Description
Groundwater level and conductivity sensor with built-in datalogger and telemetry
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.
- Surface water, Groundwater
- Vented pressure cell and 4-electrode graphite conductivity cell
- Waterlevel/Pressure, Water temperature, Conductivity
- Measures, stores, and transmits water level and temperature data
- 0 … 4, 10, 20, 40, and 100 m
- ± 0.05% FS
- Yes
Feature
- 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
Spesification
| 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 |
| Or lithium type | 1 x 3.6 V/13 Ah |
| Or lithium type | 1 x 3.6 V/26 Ah |
| Battery life (hourly measurement, one transmission/day) | |
| Lithium battery (26 Ah) | >10 years |
| Alkaline batteries | > 1 year |
| Modem | GSM Standard 850/900 MHz, 1800/1900 MHz, GSM (Quadband), GPRS |
| 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. toEC 204/108/EC, ETSI EN 301 486-1/-7, EN 61326-1 |
