Go Direct® O2Gas Sensor

Measuring Oxygen in Air

Atmosphere and Constituents of Air

Measure oxygen percentage in air — directly teaches composition of air (20.9% O2) from textbook

Candle Combustion and Oxygen Consumption

Atmosphere and Constituents of Air

Monitor O2 level as candle burns in sealed jar — directly demonstrates combustion requires oxygen (textbook experiment)

Measuring O2 and CO2 in Inhaled vs Exhaled Air

Importance of Oxygen

Compare O2 levels in fresh air vs exhaled air — directly teaches the textbook limewater experiment concept

Measuring O2 Release During Photosynthesis

The Leaf

Measure O2 increase around a leaf in light — directly teaches photosynthesis produces oxygen

O2 Consumption During Breathing

Respiratory System

Compare O2 in inhaled vs exhaled air — directly teaches oxygen used in respiration