Supersaturated water
can kill your fish
Dissolved oxygen measurements are not enough--
oxygen levels may be acceptable while nitrogen levels may be lethal
Get the entire picture -- the sum total pressure of all dissolved gases
Calculate NITROGEN levels from TDG and a dissolved oxygen measurement
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Monitor for supersaturated waters with one unit!
Total dissolved gas pressure is an important parameter for monitoring water quality effectively. When the total pressure of all the gases in the water exceeds the ambient atmospheric pressure at the water surface, supersaturation exists. The effect of excessive supersaturation on fish has been well documented, and if supersaturation exceeds the established safe levels, massive fish kills can occur.
Supersaturation can be caused by numerous man made and natural sources
- Dam spillways which allow the discharge to plunge deeply into the receiving water
- Heated discharge of thermo-electric power plants can raise the temperature of the receiving water to a point of supersaturation
- Faulty water pumps used in aquaculture recirculatory systems can cause air entrainment if a leak occurs on the suction side of the pump
- Naturally high levels of nitrogen can be found in well water
- Algae blooms can cause increased levels of gas in the water
Precautions can be taken to keep supersaturation within safe levels, but accurate in-situ gas measurements must be made to determine if remedial action is effective. The TDG Sensor makes this measurement quick and easy
Applications:
- Use to monitor fish hatcheries, rearing ponds, holding tanks, aquariums, dams, etc. wherever fish are present
- Check well water and other critical water sources for age or for supersaturation caused by heated water or faulty pumps
- Check for supersaturation caused by heated water discharge at power plants, industrial sites, and sewer outfalls
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Specifications:
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Model |
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T506 |
T507 |
T900-4 |
T900-10 |
T900-20 |
| 300E |
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| Measurement type |
Absolute |
Absolute |
Differential |
Differential |
Differential |
Pseudo differential against electrical signal. The sensor is an absolute type. Barometric is cancelled electrically. |
| Equipment |
Probe |
Probe |
Probe/cable |
Probe/cable |
Probe/cable |
Meter/Probe/cable |
| Measurement Method |
Membrane Diffusion |
Membrane Diffusion |
Membrane Diffusion |
Membrane Diffusion |
Membrane Diffusion |
Membrane Diffusion |
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| Pressure Range/Output Units |
2 atm |
400 to 1400 mmHg |
+/- 400 mmHg |
+/- 400 mmHg |
+/- 400 mmHg |
+/- 750 mmHg |
| Pressure Resolution |
0.0001 Atm |
0.5 mmHg |
0.5 mmHg |
0.5 mmHg |
0.5 mmHg |
1 mmHg |
| Pressure Accuracy |
+/- 0.002 Atm |
+/- 1.5 mmHg |
+/- 1.5 mmHg |
+/- 1.5 mmHg |
+/- 1.5 mmHg |
+/- 1 mmHg |
| Equilibration Time to 90% of final |
5 min |
5 min |
5 min |
5 min |
5 min |
5 min |
| Output Temp Range |
-30 to +50 ° C |
-30 to +50 ° C |
n/a |
n/a |
n/a |
n/a |
| Output Temp Resolution |
.0.1 ° C |
+/- 0.25 ° C |
n/a |
n/a |
n/a |
n/a |
| Output Temp Accuracy |
+/- 0.25 ° C |
+/- 0.25 ° C |
n/a |
n/a |
n/a |
n/a |
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| Voltage |
n/a |
0.5 to 5.0 volt |
0 to 5.0 volt |
0 to 5.0 volt |
0 to 5.0 volt |
n/a |
| Digital |
ASCII : 9600,8,N,1 |
ASCII : 9600,8,N,1 |
ASCII : 9600,8,N,1 |
ASCII : 9600,8,N,1 |
ASCII : 9600,8,N,1 |
3 Digit LCD |
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| Signal Output |
digital |
digital/analog |
digital/analog |
digital/analog |
digital/analog |
digital (LCD display only) |
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| Water matrix |
Natural waters, either fresh, brackish, or saline |
Natural waters, either fresh, brackish, or saline |
Natural waters, either fresh, brackish, or saline |
Natural waters, either fresh, brackish, or saline |
Natural waters, either fresh, brackish, or saline |
Natural waters, either fresh, brackish, or saline |
| Material |
Delrin, silicone, stainless steel |
Delrin, silicone, stainless steel |
Delrin, silicone, stainless steel |
Delrin, silicone, stainless steel |
Delrin, silicone, stainless steel |
Delrin, PVC, silicone, stainless steel |
| Probe Dimensions |
300mm x 45mm |
300mm x 45mm |
300mm x 45mm |
300mm x 45mm |
300mm x 45mm |
127mm x 29mm |
| Weight |
n/a |
n/a |
n/a |
n/a |
n/a |
0.9 kG |
| Membrane Cartridge |
P/N 70-020 |
P/N 70-020 |
P/N 70-020 |
P/N 70-020 |
P/N 70-020 |
P/N 70-020 |
| Deployment time before cleaning |
2-4 weeks |
2-4 weeks |
2-4 weeks |
2-4 weeks |
2-4 weeks |
not for long term deployment. Spot checker |
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| Supply Voltage |
6.0 to 13.0 Volts DC External |
8.6 to 13.6 Volts DC External |
8.0 to 16.0 Volts DC External |
8.0 to 16.0 Volts DC External |
8.0 to 16.0 Volts DC External |
2 Internal 9V alkaline batteries |
| Power consumption (continuous). Duty cycle dependent on controller. |
7 mA |
7 mA |
7 mA |
7 mA |
7 mA |
1.5 mA |
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| Storage Temp w/ membrane |
0 °C to +60 °C |
0 °C to +60 °C |
0 °C to +60 °C |
0 °C to +60 °C |
0 °C to +60 °C |
0 °C to +60 °C |
| Storage Temp w/o membrane |
-40 °C to +60 °C |
-40 °C to +60 °C |
-40 °C to +60 °C |
-40 °C to +60 °C |
-40 °C to +60 °C |
-40 °C to +60 °C |
| Operating Temp |
0 °C to +45 °C |
0 °C to +45 °C |
0 °C to +45 °C |
0 °C to +45 °C |
0 °C to +45 °C |
0 °C to +45 °C |
| Operational Depth |
< 53 meters |
< 53 meters |
< 53 meters |
< 53 meters |
< 53 meters |
< 53 meters |
| Max Depth |
60 meters |
60 meters |
60 meters |
60 meters |
60 meters |
60 meters |
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| Battery/PC connector |
available |
available |
n/a |
n/a |
n/a |
n/a |
| Cable |
Available but not included in list price. Waterproof oceanographic plug |
Available but not included in list price. Waterproof oceanographic plug |
4 meters fixed included. Vented. Bare wire end for connection to controller
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10 meters fixed included. Vented. Bare wire end for connection to controller |
20 meters fixed included. Vented. Bare wire end for connection to controller |
5 meters fixed included. Vented. Bare wire end for connection to controller |
| Pressure Cap |
INCULDED |
INCLUDED |
OPTIONAL |
OPTIONAL |
OPTIONAL |
OPTIONAL |
| Membrane Cartridge |
One Inculded |
One Inculded |
One Inculded |
One Inculded |
One Inculded |
One Inculded |
| Application |
Aquifer testing. Aging of water, remediation air sparging, cavitations |
Hydroelectric, fish protection, cavitations |
Aquaculture, Fisheries, Commercial Aquariums |
Aquaculture, Fisheries, Commercial Aquariums |
Aquaculture, Fisheries, Commercial Aquariums |
Aquaculture, Fisheries, Commercial Aquariums |
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Download Spec Sheet
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