- The OTT CTD is an integrated sensor and datalogger for measurement of water level, temperature, and conductivity in groundwater and surface water applications.
- It features a robust ceramic measuring cell for long term accuracy and has outputs for salinity and total dissolved solids (TDS). Its built in datalogger manages and stores all measurements at user-programmable intervals.
- Application: Surface water, Groundwater
- Measurement technology: Vented pressure cell and 4-electrode graphite conductivity cell
- Parameters measured: Waterlevel, Temperature, Conductivity
- Product Highlights: Measures and stores water level, temperature, and conductivity data
- Measurement range: Water level: 0 … 4, 10, 20, 40, and 100 m Conductivity: 0.001…2.000 mS/cm, 0.10…100.00 mS/cm
- Accuracy: ±0,05 % FS
- Internal data logger: Yes
- Outputs for conductivity include specific conductivity, salinity, and total dissolved solids
- Ceramic pressure cell provides industry-leading accuracy
- Conductivity, depth, and temperature measurements are combined into a single device that easily installs in a 1” or larger well or conduit
- 4 MB of memory provides capacity for over 500,000 data points—ideal for long-term deployments OR short-term, high resolution pumping studies
- Can be powered for over 18 months with off-the-shelf alkaline batteries or over 5 years with lithium batteries
- Ability to perform contact gauge control measurements without sensor removal, so no need to pull the cable for routine maintenance
- Complete in-well solution: all components are inserted into the groundwater well, eliminating the possibility of instrument vandalism
- Battery life: up to 5 years with lithium batteries, with alkaline options are also available.
- 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
- Simple Maintenance: Infrared interface, batteries, and desiccant are accessible at the top of the well or pipe and no tools are required
- 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 networks
+ Short-term or long-term projects
+ Salt water intrusion
+ Aquifer storage and recovery
+ Estuaries and wetlands