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Gasometer: An Inexpensive Device for Continuous Monitoring of Dissolved Gases and Supersaturation
Author(s) -
Bouck Gerald R.
Publication year - 1982
Publication title -
transactions of the american fisheries society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.696
H-Index - 86
eISSN - 1548-8659
pISSN - 0002-8487
DOI - 10.1577/1548-8659(1982)111<505:g>2.0.co;2
Subject(s) - supersaturation , differential pressure , environmental science , saturation (graph theory) , fish <actinopterygii> , chemistry , fishery , mechanics , physics , mathematics , organic chemistry , combinatorics , biology
The “gasometer” is a device that measures differential dissolved‐gas pressures (δP) in water relative to barometric pressure (as does the “Weiss saturometer”), but operates continuously without human attention. The gasometer can be plumbed into a water‐supply system and requires 8 liters/minute of water or more at 60 kilopascals. The gasometerˈs surfaces are nontoxic, and flow‐through water can be used for fish culture. The gasometer may be connected to a small submersible pump and operated as a portable unit. The gasometer can activate an alarm system and thus protect fish from hyperbaric (supersaturation) or hypobaric gas pressures (usually due to low dissolved oxygen). Instructions are included for calculating and reporting data including the pressure and saturation of individual gases. Construction and performance standards are given for the gasometer. Occasional cleaning is required to remove biofouling from the gas‐permeable tubing.