Ranco ETC-111000-000W Prewired Tstat
 

I've been using these with really good success especially where you don't need a proportional controller. They can be set for a very narrow temperature range, so even though they are not proportional, they can keep a pretty right range. They can handle a pretty heavy load so I am using them to control space heaters and fridges. Another advantage is they can heat or cool. I order them prewired from etc supply. I have also used them to control RHPs and they worked fine for that, too.

I have several that I use on my colubrid racks, and they work well for that application. I wouldn't use an on/off thermostat in an incubator, but they work well with heat tape. I have a few units that have been running for 8 years with no problems.

Kathy

Why??? I use a proportional on my incubator. Started with an on/off and temps would vary 2 degrees with a Vivarium Electronics. I use only Herpstat now,and it varies 0.2 degrees.;)

Not sure I understand your question - you're asking why I don't use an on/off thermostat for my incubators? I don't use an on/off for precisely the same reason you stated (2+ degrees temp fluctuation). I use a Herpstat proportional for the same reason you stated (fraction of a degree fluctuation).

Kathy

I have 3-4 Ranco running rack systems .... they work great for that application and never a problem ... incubators on self-contained or Herpstat proportional thermostats like the above ... the application dictates the thermostat for the job :-)