Portable generator including carbon monoxide detector

A generator comprising:

• an engine;
• an air-fuel mixing device coupled to the engine, wherein the air-fuel mixing device is configured to receive air from an air intake and combine the air with fuel to create an air/fuel mixture;
• an exhaust outlet configured to emit exhaust gases from the engine;
• and
• a CO sensor configured to detect CO concentration, wherein the CO sensor is positioned at a lower elevation on the generator than the exhaust outlet;
• a CO sensor controller coupled to the CO sensor and configured to control operation of the CO sensor, wherein the CO sensor controller comprises:
• a shutdown circuit configured to determine an environment of the generator, wherein the environment of the generator includes at least an enclosed environment and an open environment;
• and
• an alert circuit configured to receive an alert indication from the shutdown circuit and alert a user of the generator to the detected CO concentration;
• wherein the shutdown circuit is further configured to determine a first predetermined threshold for the enclosed environment and a second predetermined threshold for the open environment.