"We rely on the divers to provide water levels in remote areas for long periods of time" - Joseph Abbott, Hydrogeologist
Professional applications of the CTD-Diver include:
Aquifer storage and recovery projects
Salinization projects
Saltwater intrusion projects
Discharge monitoring
Monitoring landfill sites
Monitoring groundwater and surface water
Monitoring stored brines and reclaimed waste water
Groundwater quality recording
Frequent monitoring of soil and groundwater quality is traditionally a labour-intensive job. This is also the case if saltwater intrusion or contamination at remediation sites needs to be monitored.
The new CTD-Diver* by Schlumberger Water Services now sets the standard for reliability and longevity in groundwater quality monitoring. The CTD-Diver is a fully stand-alone datalogger with built-in non-volatile memory, battery and sensors. The compact ceramic casing and sensor and unparalleled conductivity measuring range (0-120 mS/cm) make the CTD-Diver suitable for use at every measuring site.
The CTD-Diver is impervious to the most aggressive substances found in water environments. Its ceramic casing resists when even the strongest metals yield.
CTD-Diver is a highly reliable, compact datalogger for the simultaneous measuring of groundwater level, temperature, and conductivity. These parameters are measured at time intervals pre-determined by the user. The measured values are stored in the datalogger’s non-volatile memory and can be read out at any given time.
CTD-Diver Benefits
Frequent, long-term measuring without human intervention
Reliable and accurate measurement data
Easy calibration
Specifications
Compact size, 18-22 mm [0.71 - 0.81 inch] diameter and 135 mm [5.3 inch] length for easy handling and installation
Three sensors in one sealed, corrosion-resistant ceramic housing
User-friendly software, including various export formats
Programming the CTD-Diver takes only a few minutes on your computer in the field or at the office. You can enter location, instrument code, start date and time, sample rate, sample method, and select conductivity range. If you select an event based sample method, measured values are stored only if specified changed in conductivity occur. The CTD-Diver can start measuring at any time you specify.
Measuring
The CTD-Diver has three sensors: a pressure sensor to determine water level, a temperature sensor and a four-electrode sensor to determine conductivity. The internal memory can store up to 48,000 measurements per parameter. For each measurement, the date, time, water level, temperature and (specific) conductivity are stored.
Reading Data
Data may be recovered using an optical reading unit; with the use of a Diver Data Cable** (DDC) and a PocketPC or laptop you can readout the CTD-Diver without removing it from the monitoring well.
The CTD-Diver is supplied with the Diver-Office* software package. Diver-Office is easy to use and offers additional features such as a barometric compensation wizard to convert pressure readings into water levels. Diver-Office also includes a calibration wizard for quick and easy conductivity sensor calibration. The data from the CTD-Diver is stored on your computer and can be exported in various formats to be used in a spreadsheet program or database.
Models
The CTD-Diver is available in three models with different pressure measuring ranges (10, 50 and 100 m water column). All models have a conductivity measuring range of 0–120 mS/cm and a ceramic casing which is practically damage- and corrosion-proof. The temperature range is from -20 °C to 80 °C.
Schlumberger Water Services provides innovative groundwater monitoring and sampling instruments, field data acquisition accessories, and software for environmental data management, analysis, visualization, conceptual modeling and simulations, with a complete range of training and support services for environmental consultants, government agencies, industry, and educational/research institutions.
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