Each knob is mechanically powered and will physically turn itself to the off position, making it ideal for any existing range. A unit packs a battery that's good for six months of life before you'll need to recharge it, as well as the sensor that's mounted close to your cooker like a smoke alarm. Inside, there's a motion detector (to sense if you're actually around) as well as a gas, smoke and heat sensor that will shut the range off. Own this and you'll never again have to worry about if you've left the gas on.

The company is currently crowdfunding the gadget on Kickstarter and early birds can snag the four units and a sensor for $239. If you wait until the campaign ends, it will wind up costing you $299, although that's still cheaper than the cost of burning your house down. Each sensor can take up to eight knobs at once, should you be lucky enough to have that big of a kitchen. The products should begin shipping by the end of the year.