OTT CTD Sensor

• 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