Overview
The document provides detailed specifications and applications for a Total Dissolved Gas (TDG) Sensor used to monitor water quality by measuring gas pressure in water bodies. Supersaturation, a condition where gas pressure exceeds atmospheric pressure, can be harmful to aquatic life, particularly fish.

Applications
The TDG Sensor is applicable in various water environments including fresh, brackish, and marine waters. It is crucial for monitoring conditions that can lead to supersaturation, such as dam spillways, heated discharges from power plants, faulty aquaculture systems, naturally high nitrogen levels, and algae blooms.

Specifications

• Measurement Type: Absolute, Differential, Pseudo differential
• Pressure Range: 2 Atm, 400 to 1400 mmHg, +/- 400 mmHg, +/- 750 mmHg
• Pressure Resolution: 0.001 Atm, 0.5 mmHg, 1 mmHg
• Pressure Accuracy: +/- 0.002 Atm, +/- 1.5 mmHg, +/- 1 mmHg
• Equilibration Time: 5 minutes
• Temperature Range: -5°C to 40°C
• Output: Voltage, Digital, Analog, LCD display
• Materials: Delrin®, silicone, stainless steel, PVC
• Dimensions: 300 mm x 45 mm, 127 mm x 29 mm
• Power Supply: 6 to 16 volt DC external, 2 internal 9V alkaline batteries
• Operating Temperature: 0°C to 45°C
• Storage Temperature: 0°C to 60°C with membrane, -40°C to 60°C without membrane
• Operational Depth: <53 meters, Maximum Depth: 60 meters

Accessories
The sensor comes with various accessories including a pressure cap, membrane cartridge, and cables. Some accessories are included, while others are available for separate purchase.

Conclusion
The TDG Sensor is a versatile tool for monitoring water quality across different environments, ensuring that supersaturation levels remain safe for aquatic life.