Envco – Environmental Equipment

Overview

Dimensions (diameter x length): 15mm x 46mm
Sensors: Conductivity (salinity), temperature
Standard temperature range: -1°C to +40°C
Temperature accuracy: +/-0.1°C
Standard conductivity ranges: 3 to 37 mS/cm and 13 to 50 mS/cm
Salinity accuracy: +/-1 PSU
Memory size: 130,826 measurements per sensor
Battery life: 4 years
Housing material: Alumina (ceramic material)

Description

The DST CT 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.

After recovering the DST recorded data is uploaded to SeaStar where results are displayed both in graphic and tabular form. After retrieving the data, the DST can be re-programmed and reused as long as the battery lasts.

A set of Communication Box and SeaStar software needs to be purchased with the first order.

Examples of Application

The DST CT can be used as a self contained data logger for sampling in the oceans for environmental data collection salinity and temperature.

The DST CT is suitable for studies in e.g.:

* Oceanography
* Marine biology & ecology
* Marine animal tagging (externally)

Envco can provide a special plastic protective housing for attaching to deployment lines, buoys, or moorings. For more information about accessories please click here.

Technical Specifications
Sensors Conductivity (salinity) and temperature
Size (diameter x length) 15mm x 46mm
Housing material Alumina (Ceramic)
Weight (in air/in water) in air: 21g in water: 13g
Battery life 4 years *
Memory type Non-volatile EEPROM
Memory capacity 261,900 measurements
Memory capacity bytes 392,478 bytes / conductivity-temperature 3 bytes
Memory management Custom programming
Data resolution 12 bits
Temperature resolution 0.032°C (0.058°F)
Temperature accuracy +/-0.1°C (0.18°F)
Temperature range -1°C to +40°C (30°F to 104°F)
Temperature response time Time constant (63%) reached in 20 sec.
Conductivity ranges Available ranges (customer specified): 1) 3 to 37 mS/cm 2) 13 to 50 mS/cm
Conductivity resolution 0.04 mS/cm
Conductivity accuracy +/-1.5 mS/cm
Salinity range Depends on conductivity range selected
Salinity resolution 0.02 PSU
Salinity accuracy +/-1 (PSU)
Data retention 25 years
Clock Real time clock Accuracy +/-1 min/month
Sampling interval In second(s), minute(s) or hour(s)
Number of different sampling intervals 1 to 7
Communications Communication Box, RS-232C 9 pin serial or USB
Attachment hole 0.9 mm (in diameter)
* For sampling interval of 10 minutes. Specifications may change without notice.