Safera uses a patented technology to accurately measure the temperature of pans on a cooktop

We are often asked how Safera differs from other automatic cooker shut off devices.

One important difference can be found in everyday use. Traditional stove guards may alarm unnecessarily or fail to work in an emergency, because their temperature sensors ignore a fundamental issue: pots and pans aren’t all made of the same materials.

Safera developed and patented a solution to this problem.

The most important consideration for cooking safety is to ensure that the temperature of cookware does not rise so high that an oil fire ignites. However, the real challenge is to ensure that safe, normal high-temperature frying can continue if there’s no danger.

If cooking is to be safe and unencumbered, the stove guard with auto shut off must therefore be able to measure the temperatures of different cookware accurately.

Measuring the temperature of the pan accurately is difficult

Measuring temperature is not as simple as one might think.

Measuring the temperature directly at the surface of each pan would produce an accurate result, but this is impractical.

Infrared measurement above the cooktop is therefore the only practical option for cooker shut-off devices. The challenge of indirect IR measurement is that different materials radiate heat in very different ways, even though they are just as hot.

Black dishes, such as cast iron pots or Teflon frying pans, strongly radiate heat. In contrast, shiny pans such as stainless steel emit significantly less heat.

Oftentimes, pans of different sizes and made of different materials are also used on the hob simultaneously.

Identifying a dangerously hot pan amongst them requires more than a traditional temperature measurement.

Traditional single-wavelength IR sensors cannot distinguish the thermal radiation of different materials

The difference between the heat radiation of the pans can be one factor of many.

If you were to use an off-the-shelf infrared sensor to measure the temperature of a shiny stainless-steel pan, it might, for example, read 40C, even though the actual temperature of the pan is 100C.

The measurement is unreliable, because off-the-shelf sensors measure a single wavelength of IR only – with single wavelength it is practically impossible to reliably identify the actual temperature of different pans.

With multi-pixel sensors, you’ll only get more incorrect measurements

Some manufacturers are trying to solve the problem by using multi-pixel, even 64-pixel sensors found also off-the-shelf.

Multi-pixel sensors can provide additional information on the temperature differences of the hob surface, but the core sensor technology is still based on a single wavelength.

Thus, the multi-pixel sensors are incapable of measuring the temperatures of the dishes accurately too, and by adding pixels, more incorrect measurements can end up being taken!

Instead of increasing the number of sensors, the problem needs a different, more sophisticated solution.

Safera stove guard is the only cooking safety device to overcome this problem with a patented solution.

The sensor system developed by Safera is designed to reliably measure the temperature of various cookware

There are no ready-made sensors for reliable measurements of the hob surface temperature.

Safera has solved the problem by developing its own patented sensor system that measures several different wavelengths of thermal radiation at the same time.

By combining several measurements in different wavelength ranges, Safera is able to detect temperatures reliably and accurately for all types of cookware, regardless of what material they are made of.

Thanks to this unique technology, Safera is able to detect a single dangerously overheated vessel amongst several.

The technology in Safera stove guard is evident in everyday use

The temperature measurements taken by Safera accurately correspond to a real risk situation, so you’ll notice how Safera technology differs from other cooking safety solutions in everyday use.

Safera quickly detects hazards and does not alarm unnecessarily during normal cooking – whether you have a Teflon-coated pan, a steel kettle, or both at the same time.

See also:

Smarter and safer cooking

Sometimes we can’t focus 100 % on cooking because our attention is needed elsewhere. Wouldn’t it be nice if your stove would be smart enough to tell you, when your pan is ready…

Read more »