Film based carbon dioxide sensor

A gas concentration monitoring system comprising:

• a data logger;
• a radiation source comprising one or more emitting elements configured to emit radiation;
• a radiation sensor comprising one or more sensing elements configured to detect radiation received at the radiation sensor from the radiation source;
• and
• a reactive material located between the radiation source and the radiation sensor and configured to react to the presence of a gas, wherein the reaction of the reactive material impacts an amount of radiation detected at the radiation sensor from the radiation source,
• wherein the radiation sensor is in communication with the data logger, and the data logger is configured to at least one of (i) record data associated with the amount of radiation received at the radiation sensor and (ii) determine if an amount of radiation received at the radiation sensor is either above or below a threshold.

A method of monitoring a concentration of gas within an enclosure, the method comprising:

• controlling a radiation source to transmit radiation;
• passing the transmitted radiation through a reactive material;
• detecting the amount of radiation that passes through the reactive material;
• and
• determining a concentration of a gas based on the amount of radiation detected,
• wherein the reactive material is configured to react to the presence of the gas, wherein the reaction of the reactive material impacts the amount of radiation that passes through the reactive material.