The SMART series offers more control over the heating process. These models have a modern easy-to-use touchscreen and 2 temperature probes for dual temperature sensing (Delta T). This allows more control over the heating process and less metallurgical "tension". A clear graph also shows the heating process. Features include: 1. Ability to create proof of work. 2. Log function to store data or export to a USB-stick. 3. Tension-free heating (Delta T). 4. Heats according to preset temperature/time curve