Salinity, Conductivity, Temperature and Depth Logger (Wide Range, 5 to to 500 meters)

Note: A set of Communication Box and SeaStar software needs to be purchased with the first order.This small autonomous salinity probe DST CTD measures and records conductivity, temperature and pressure. In addition to the three measured parameters the software calculates and displays salinity values and velocity in graphical and tabular form upon data conversion. It is only 50 mm in length and 15 in width. Due to its small size it is easy to mount it on various gear and nets.Wide conductivity rangeThis version of the DST-CTD can capture conductivity from 3 to 68 mS/cmLong battery life – up to 5 yearsMeasuring at 10 minute interval, the logger can last up to 5 years.SeastarThe DST CTD is supported by the SeaStar software and the Communication Box which serves as an interface between the logger and a PC. Communication between the logger and the Communication Box is wireless.In SeaStar, the user sets the start time, start date and sampling interval before starting the recorder. Up to seven different intervals can be set for the same measurement sequence. This is especially useful when more frequent measurements are needed at a certain time period. One interval for the whole measurement sequence is more commonly used though.After recovering the DST data logger, recorded data is uploaded to SeaStar where results are displayed both in graphic and tabular form. After retrieving the data, the logger can be re-programmed and reused as long as the battery lasts.

Specifications

– Sensors: Conductivity (salinity), temperature, pressure (depth)- Size (Diameter x Length): 15 mm x 50 mm- Housing Material: Alumina (Ceramic)- Weight (in Air/in Water): 21g/13g- Data Resolution: 12 bits- Conductivity Range: 3 to 68 mS/cm- Conductivity Resolution: 0.03 mS/cm- Conductivity Accuracy: +/-1.5 mS/cm- Salinity Range: Depends on conductivity and temperature range (consult with Star-Oddi)- Salinity Resolution: 0.02 PSU (Based on conductivity full scale accuracy at 24 C)- Salinity Accuracy: +/-1 PSU (Based on conductivity full scale accuracy at 24 C)- Temperature Range: -1 to +40 C (30 to 104 F)- Temperature Resolution: 0.032 C (0.058 F)- Temperature Accuracy: +/-0.1 C (0.18 F)- Temperature Response TimeTime constant (63%) reached in 20 sec.- Standard Depth Range: 5m-500m- Depth Resolution: 0.03% of selected range- Depth Accuracy: +/-0.6% of selected range- Depth Response: TimeImmediate- Memory Type: Non-volatile EEPROM- Memory Capacity: 87,217 measurements per sensor- Memory Management: Custom programming- Measurement Interval: User specified in second(s) minute(s), or hour(s)- Minimum Measurement: Interval1 second- Multiple Intervals Option: Up to 7 different intervals- Data Retention: 25 years- Clock: Real time clock. Accuracy +/-1 min/month.- CommunicationsCommunication Box, wireless transmission when DST sits in the box. Connection to PC: USB cable.- Attachment Hole0.9 mm (diameter)- Battery Life5 years (For sampling interval of 10 minutes.)- Replaceable BatteryNo