To monitor total dissolved gas (TDG), In-Situ^® Rentals offers easy-to-use handheld TDG monitors. 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.

Available for rent in the following models:

• 300E TDG meter & sensor: Includes 5-m cable
• T506 TDG sensor: For connection to laptop or RuggedReader^® handheld PC
• T900-4 TDG sensor: Includes 4-m cable for connection to datalogger or PLC