Was wondering if it would be possible to relay a CO sensor to trigger a window motor through an arduino?
It really depends on what you want to use. You can certainly make a system using a carbon monoxide sensor that is being monitored by an arduino that actuates a motor. The real question is how much existing hardware are you trying to use. Will you be trying to use an existing CO alarm to trigger the arduino or will you get a separate CO sensor like this Carbon Monoxide Sensor - MQ-7 - SEN-09403 - SparkFun Electronics. Does the window already have a motor on it, or will you be trying to make your own window motor. What voltage does the motor require. How far away from the motor will the sensor be.
The idea of the project is to simulate a car opening its windows when a certain CO level is reached. the window motor would be very close to the sensor and it is 12 V which obviously is a higher than an arduino, but we can find a power relay. The sensor would be an MQ7 arduino compatible sensor like the one you have linked to. We are still deciding on whether or not to buld an enclosed area that simulates a car, like a box, and then have one side open by the motor, like a window, or just to show when a certain CO level is reached, the window motor activates.