Features
- High accuracy, long-term stability
- Multiple data outputs
- Superior response rate with the hurricane model, HGTD
- Easily integrated into any system
- Patented tubular interface (HGTD provides unique biofouling resistance)
- Internal data logger and controller with 2GB flash memory
Sensor Applications
- Air-sea gas transfer rates
- Net biological production estimates
- Near-surface flux studies
- Correction of other dissolved gas measurements
GTD-Pro™ Submersible Sensor
The GTD-Pro™ is the most accurate and stable total dissolved gas sensor on the market. It measures the sum of the partial pressures of all dissolved gases, i.e. gas tension.
In most natural waters N2 and O2 are the dominant dissolved gases. When oxygen is measured independently, N2 can be determined from gas tension. These gases measured together can be used to make substantially improved estimates of net biological production.
Additionally, gas tension measurements are used to study air-sea gas exchange and upper-ocean physical, chemical, and biological processes.
Also available is the HGTD-Pro™ hurricane model that uses a patented supported tubular interface for faster equilibration than the GTD-Pro™.
PRODUCT SPECIFICATIONS
| Sensor Performance | |
|---|---|
| Accuracy | 0.01% |
| Resolution | 0.002 mbar |
| Stability | < 0.02 mbar/yr drift |
| Range (other ranges available) | 800-2000 mbar |
| Equilibration time (t63) | GTD-Pro: 3 min HGTD: 1 min |
| Physical | GTD-Pro | HGTD |
|---|---|---|
| Length | 38 cm | 25.4 cm |
| Diameter | 10 cm | 11.7 cm |
| Weight air | 2.8 kg | 1.6 kg |
| Weight water | 0 kg | 0.6 kg |
| Housing | Acetal Plastic | |
| Depth | 0-600 m | 0-50 m |
| Electrical | |
|---|---|
| Input voltage | 10-30 VDC |
| Power consumption | 0.55 W |
| Data output | RS-232, ASCII format |
| Sample rate | 1 second (user selectable with datalogger/controller) |
OPTIONAL ACCESSORIES
Water-Pumped Head
Reduces biofouling and improves response rate
External Battery Pack
76, 134, or 247 Amp-hour capacity
Titanium Housings
Rated to 4000 meters depth