New DOAS instrument in testing

We are building a new MAX-DOAS instrument with active temperature control for the spectrometer.  This is the innards of the new system.  The spectrometer is in the thermal garage at the top and the electronics / computers are at the bottom.  The temperature control is done with thermoelectric cooling / heating using an arduino micro controller and a H-bridge motor driver.  It’s on the roof running now and should be in the field soon.