Adding humidity to incubator

[Hawgon]

I have a chance to aquire a medical grade incubator but it does not have a humidity source. After reading some of the forums on this site can I just add a tray/bowl of water with a sponge in it and then track my humidity levels and adjust accordingly? Any advise or help would be appreciated.

 

[The Breaker]

from what I now that would be fine what do you mean by medical grade

 

[Hawgon]

Used in the medical field for cultures, etc. It has very accurate temp control with multiple alarms. From what I understand it retails for around $3500 and I might be able to pick it up for $100-150, we all know how that goes though.