They are all close they might be broken down to two groups on/off ones and proportional ones.
on off types do not have the accuracy on the probe as proportional ones do which may or may not matter. Depending on the set up. On offs IMO work well in semi stable temps with indirect heat like that found in a rack. Proportional t-stats are a bit more flexible than on offs. both will work fine in a rack my feeling is that I want to support development of equipment that is designed for the job I am trying to do. I like to buy proportional units that are build to control reptile temps, not industrial appliances.
Reply With Quote