Technologies are generally described for an air monitoring device, a method for forming an air monitoring device, and methods and systems for monitoring air using an air monitoring device. A method of forming an air monitor device may include placing a sorbent membrane on a material of n type conductivity. The method may further include placing an electrode on the membrane and placing a thermoelectric heater in thermal communication with the membrane. The method may further include placing the membrane, material, and electrode in a sealed container including a valve to form the air monitor device. The valve may be effective to selectively expose the membrane to an environment outside of the container.