OTT ecoLog 800地下水位计

OTT ecoLog 800
Quantitative
Hydrology
The OTT ecoLog 800 is a compact system for monitoring water level, temperature, and
conductivity in surface and groundwater. Complete remote data access is available via
GSM/GPRS cellular using SMS, HTTP, FTP, and , providing users with all data and staus
messages from the office. Additionally, the OTT ecoLog 800 was designed for full installation
into groundwater wells, eliminating the potential for vandalism and exposure to the weather
elements over time.
Featuring a 4-electrode conductivity cell incorporating graphite electrodes, the OTT ecoLog
800 is robust and resistant to contamination, and measuring errors caused by polarization
effects are virtually eliminated. With a durable ceramic pressure cell, saltwater-resistant 904 L
stainless steel probe, and kevlar-reinforced cable, accurate measurement is ensured over time.
Additionally, the OTT ecoLog 800 features a datalogger with 4 MB of memory, allowing over
500,000 measurements to be stored. With lithium batteries, the OTT ecoLog 800 can last over
10 years in the field, reducing the potential for data gaps and instrument downtime.
Self-contained water level and conductivity
logger with flexible remote data transmission

Applications
Continuous or real-time water level, temperature,
and conductivity measurement of:
——
Groundwater wells
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Streams, rivers, channels, or canals
Ideal for monitoring:
——
Short-term or long-term projects
——
Salt water intrusion
——
Aquifer storage and recovery
——
Estuaries and wetlands
Features & Benefits
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Remote data transmission – receive data, status messages, and low power warnings from the office via SMS, HTTP, FTP, or and save money by reducing the number of site visits for data download and maintenance
——
Complete in-well solution – all components are inserted into a groundwater well of 2" diameter or greater, eliminating the possibility of instrument vandalism
——
Long battery life – over 10 years of life with lithium batteries reduces site visits and potential for data gaps due to power loss
——
Durable measurement cell – robust ceramic measuring cell offers industry-leading accuracy and does not deform over time like membrane technology, providing long-term measurement stability. The accurate 4-electrode conductivity measuring cell provides outputs for salinity and total dissolved solids （TDS）.
Additional Features
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External antenna available for greater signal strength
——
Simple on-site communication with magnetized Infrared （IrDA） interface
——
Only one user-friendly software program is required to setup and download data on-site
——
Lithium or alkaline battery options are available – all batteries can be changed
on-site without tools

Specifications：

Output parameters
Water level/pressure, temperature, specific connectivity, salinity, TDS
Water level measurement （pressure）
--
13, 33, 66, 131, 328 ft （4, 10, 20, 40, 100 m）
--
Resolution: ± 0.01 % FS
--
Accuracy: ±0.05 % FS
--
Long-term stability: ±0.1 % /a FS
Temperature measurement
--
Measuring range: -13 °F to 158 °F
（-25 °C to +70 °C）
--
Resolution: 0.01 °C
--
Accuracy: ±0.1 °C
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 to100 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
--
2 x 1.5 V alkaline C cells
--
or 1x 3.6 V/13 Ah lithium type
--
or 1x 3.6 V/26 Ah lithium type
Battery life
Hourly measurement, one transmission/day
--
Lithium battery （26 Ah）: >10 years
--
Alkaline batteries: >1 year
Modem
GSM Standard 850/900MHz/
1800/1900MHz,
GSM （quad band）, GPRS
Antenna
Built-in; robust and weather-proof, external antenna optionally available （SMA-m）
Communication interface
Infrared （IrDA）
Measured value memory
4MB, approx. 500,000 measured values
Sampling/storage interval
5 seconds to 24 hours
Operating temperature
-22 °F to +185 °F （-30 °C to +85 °C）
Storage temperature
-40 °F to +185 °F （-40 °C to +85 °C）
Installation
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In observation wells from 2" on;
（multi-purpose suspension bracket available as an accessory）
--
With suspension brackets for
OTT top caps: 3", 4", 6"
Dimensions L x Ø
--
Probe: 12.5 in x 0.9 in （317 mm x 22 mm）
--
Communication unit: 20.5 in x 2 in
（520 mm x 50 mm）
System length
（Cable length incl. communication unit and pressure probe）
6.6 ft to 656 ft ± 2 in （2 to 200 m ±5 cm）
Weight
--
Probe: Approx. 15.2 oz （0.43 kg）
--
Communication unit （incl. batteries）:
Approx. 35 oz （1 kg）
Housing material
--
Probe: Stainless steel （DIN 1.4539, 904 L ）
--
Communication unit: Aluminum, PA-GF
Type of protection
--
Probe: IP 68
--
Communication unit: IP 67
EMC limits
According to EC 204/108/EC,
ETSI EN 301 486-1/-7, EN 61326-1