Schlumberger CTD-Diver groundwater quality monitor

Frequent monitoring of soil and groundwater quality is traditionally a labour-intensive job. This is also the case if saltwater intrusion or pollution at remediation sites needs to be monitored. The CTD-Diver from Schlumberger is a fully stand-alone data logger with built-in memory, battery and sensors. It is used for reliability and longevity in groundwater quality monitoring.

Housed in a ceramic casing, it is impervious to the most aggressive substances found in water environments and resists when even the strongest metals yield. Conductivity measuring range is 0-120 mS, which makes it suitable for use at a variety of sites.

It is a compact data logger for the simultaneous measuring of groundwater level, temperature and conductivity. These parameters are measured at time intervals predetermined by the user. The measured values are stored in the data logger’s memory and can be read out at any given time.

The device has three sensors: a pressure sensor to measure water level, a temperature sensor and a four-electrode sensor to measure conductivity. The internal memory can store up to 16,000 measurements for each parameter. All readings are date and time stamped.

Applications include: aquifer storage and recovery projects, salinisation projects, saltwater intrusion projects, discharge monitoring, monitoring landfill sites, and monitoring groundwater and surface water.