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DO meter - Coggle Diagram
DO meter
Ways to measure DO
wrinkler titration
optical sensor (Electrochemical)
Same principle as pH meter
calorimetric
How pH meters work
Types of electrode
Glass
reference
DO
sources
Air
Plants by product
Factors
Temperature increase, DO decrease
Salinity, seawater holds 20% less DO than freshwater
Pressure increase, DO increase
DCD
more soluble than O2
Aquatic animal respiration and decomposition
Combined pH meter vs ISFET pH sensor
ISFET sensor
Non glass sensor (ISFET)
semiconductor covered with Sio2
3 terminal: source, drain, substrate
for food and biomedical testing
Non glass pH electrode (MOSFET)
pH
Water ionisation
Separate and Combined (pH meter)