Hi Sally
This product is still available at Ascott (
http://www.ascott-dairy.co.uk/acatalog/Milk_Pasteurisers.html) - Kochstar-Digital-Cauldron-27-litre-with-Heating-element-DP319
In answer to your questions
What is the minimum volume it will handle? (Currently I make cheeses 5L max at a time)
I've done 5L of Goat Milk in it fineWhat is the maximum time for which it will hold a temperature (I presume on the timer?)
2 hoursWhat is the minimum temperature it can hold? (Some of my cheese recipes call for 21 or 25 deg c, and several for 29 C.)
30 deg cDo you have any pictures of it?
I've attached pic from Ascott siteHow easy is it to clean? (A picture may answer this one)
I've cleaned it with a sponge and soapy water in the past, it is fairly straight forward, just like a big pan! What is the internal surface made of and would it be scratched if I cut my curds in it?
Enamel. It would depends what you cut them with.How long have you had it?
I've had it about 12 months but only used it twice as I drank the goat milk raw and the kids wouldn't drink it. It's just been sitting in a cupboard so thought I would sell it now that I have sold the goats!How / where would I get parts / service / repairs, do you know?
It is a German one and I think there are a list of suppliers etc on their website (http://www.kochstar.de/)