I see, does the sand act as a heatsink and steady the temperature ? It's got to be worth a try then.
I'd looked on a chemistry students forum and one guy gave the part numbers for a pretty accurate thermostatic control and a temp sensor with digital display which were quite cheap. He'd modified a single ring plate element cooker and reckoned he could make it almost as accurate as the laboratory version the original poster needed but couldn't afford. Feels like a project egg has just hatched.

Last edited by El Garro; 05/04/17 06:40 PM.

Rust never sleeps !