The standard hack is to use a PID controller.  IF you google, you will find many articles detailing exactly how, such as this detailed one from Over Engineered.

There are now also a couple of vendors of moderately low cost circulators intended specifically for this application such as Sansair that you insert into a pot or cooler.  They are new to the market, so there are some early adopter issues being reported, but the idea is quite elegant.

Presto multi cooker sous vide- clarification?
I have a project to implement an EDI solution into an existing ecommerce-like website. There are only three EDI documents involved and only one company to transfer files with. They have strictly defined the X12 documents, and will be responsible for all of the GET/PUT's to an FTP site. The three documents are the Inventory Advice (inbound), Shipment Notification (inbound), and Invoice (outbound).

We do not want/need to implement a full-blown EDI management solution. My question is, am I crazy to think that this is a relatively simple parsing task using PHP? Does anyone know of any existing PHP libraries that might be useful (maybe X12 to XML)? My searches have come-up empty. I'd like to get started on my own right away if it is a realistic goal and no other resources are available.
