Spectrometer Cooling System


We have a spectrometer in a metal case with size 27/27/27 mm. The ambient temperature for our application will vary from 25 to 80oC. The spectrometer while operating at room temperature can reach temperature 60oC. We need to keep the spectrometer at 25oC.

Your support technician recommended DA-011-05-02-00-00 system.
Could you please recommend a thermoelectric cooling plate(s), a heat sink(s) and a fan as separate units?

Welcome to the Digi-Key TechForum kim.mikhail86.
Click Here for the thermoelectric assemblies that we have available. If you want to build your own, Click Here for the individual Peltier devices. You will have to decide what size heatsink and fan you require, and they we can look for possible matches.

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Unfortunately it is not possible to make specific recommendations for thermoelectric cooling systems based on temperatures alone–the power dissipation of your spectrometer and the details of the mechanical system design will have very significant effects.

The resources below discuss the application of thermoelectric systems and thermal modeling in some depth. In my experience, the great majority of those who attempt to use these devices without taking the time to understand the theory and do the math will fail in their efforts, due to the absolutely brutal inefficiency of currently-available devices.

The DA-011-05-02-00-00 device mentioned is a nice example of the sort of product that is available, but will not work in your application. Achieving a net cooling effect of 55°C for a device that dissipates a significant amount of power is not trivial, and may approach the limits of what is possible with a single-stage system. As a rough estimate, I’d expect that a thermoelectric cooling system would consume about 50x the amount of power being supplied to the spectrometer under the conditions mentioned.

Thank you Rick. We managed to decrease the necessary cooling just to 15oC and we will try to use DA-011-05-02-00-00 just for first estimation. Thank you for the resources provided

Thank you David