Keep temperature at exact 62C/143F for an hour Is there an appliance with which I can keep something at a specific temperature, in this case 62C, without constantly checking manually? I have been looking at thermostat controlled induction plates but haven't found any that go that low. 

Edit for more information:


the temparature should stay within 2 or 3 degrees of the target, it's less of a problem if it goes too low, but too high chemically alters some key ingredients.
it should be able to do at least about 500ml of volume.
Are we talking liquid or solids? Water has a high specific heat, meaning you need a lot of energy to change their temperature. That being said, I'd either go for a sous-vide approach, seal whatever you want to keep at that temperature in bags and toss it into a pre-warmed 62° C water bath, or buy/rent a medium/upper quality range dehydrator. These usually work for temperatures between 50-90° C, and are quite accurate.