Wireless Conductivity, Temperature & Depth Profiling Logger
The Conductivity, Temperature & Depth (CTD) Logger is a wireless data logger that contains an integrated Conductivity Sensor, temperature sensor and pressure sensor. The small, rugged design allow the logger to be easily deployed on a variety of fishing gear.
The CTD features a fast response time and the ability to dynamically change the recording interval as gear is fished. The logger will record faster while equipment is being hauled to capture the profile of the water column and slower while the gear soaks.
When the gear is hauled, the latest data will be automatically downloaded wirelessly to Lowell Instruments’ Deck Data Hub. The Deck Data Hub will automatically display the data on the touch screen display and transmit the data to the cloud where it can be further processed and/or viewed by research scientists, fishermen and other third parties via Lowell Instruments’ API.
Key Features & Benefits
- Accurate up to ± 0.01°C from -2 to 35°C
- Depth measurement up to 750 meters
- Resolve static orientation to 1°
- Under 10 seconds response time
- 1 sample per second to 1 sample per hour
- Never memory limited
- Uses commonly available AA batteries
- Hands free, automated IoT data collection
Required System Contents
- Deck Data Hub
- Cellular Plan
| Preliminary Jan/Feb 2026 | |
|---|---|
| Conductivity Sensor | |
| Sensor Type | NBOSI |
| Range | 0 to 60 mS/cm |
| Accuracy | ± 0.05 mS/cm |
| Resolution | 0.001 mS/cm |
| Response Time | 20 seconds |
| Salinity Calculated | |
| Sensor Type | NBOSI |
| Range | TBD |
| Accuracy | TBD |
| Resolution | TBD |
| Response Time | TBD |
| Temperature Sensor | |
| Sensor Type | Thermistor |
| Range | -2° to 35°C |
| Accuracy | ± 0.1°C Typical (± 0.01°C optional) |
| Resolution | 0.001°C |
| Response Time | 1 second |
| Depth Sensor | |
| Sensor Type | Ceramic Pressure Sensor |
| Range | 300 Meters (164 fathoms) – (option to 750 meters) |
| Accuracy | 0.5% full scale (0.25% full scale optional) |
| Resolution | 0.001 m – 0.001 dBar |
| Response Time | <1 second |
| Orientation Sensor | |
| Sensor Type | 3-axis Accelerometer |
| Range | 0 to 360 degrees |
| Accuracy | ± 5 degrees from vertical |
| Environmental | |
| Depth | 300 meters (164 fathoms) max depth – (option to 750 meters) |
| Operating Temperature | -2° to 35°C in water (-20° to 50°C in air) |
| Data Logger Electronics | |
| Memory | 128 MB non-removable, non-volatile memory |
| Communications | BLE 5.0 |
| Battery Type | AA user-replaceable batteries |
| Battery Life | 12 months |
| Internal Clock Accuracy | 1 minute per month |
| Operating Modes | |
| Configurable Recording Rates | Fixed Mode: 1 sample per second to 1 sample per hour |
| Profiling Mode: 1 Hz during profile; 1 minute to 1 hour when stable at depth | |
| Data Offload | Automatic hands free download to the DDH |
| Mechanical | |
| Dimensions | 68 mm (2.7”) diameter x 194 mm (7.6”) length |
| Weight | 272 grams (9.6 ounces) |
Please fill out the following form or contact us at (508) 444-2616 or email at sales@lowellinstruments.com
