The portable propane-butane gas heaters provide large volumes of instant heat that can be used to heat larger spaces in a very cost effective and efficient way as opposed to other means of heating. They are compact and fuel efficient and provide a lot of power that can quickly heat larger areas, but they do come with a drawback – they are suitable for areas with good ventilation. If you do not ventilate the room well using a portable gas heater may lead to deficiency in oxygen supply and that can e dangerous for your health. On the thermal image above you can see a portable propane-butane gas heater in operation and as you can see the combustion zone is the hottest part with around 200 degrees Celsius with pretty much all the rest remaining at about room level temperatures. The propane-butane gas container may form some ice on the surface as it may get pretty cold when the gas heater is in use, look at the bottom part of the gas container where the temperature gets lower.


Wireless routers are something very common nowadays in many homes as it is very convenient and affordable way to share the Internet connection to multiple devices at home or in the office. Most home WiFi devices, especially the ones that are very affordable priced and targeted at consumers, are often designed for low to moderate loads and if they are overloaded they often start to overheat and cause you connection trouble. So it is wise to keep an eye on the load of your wireless router and it it starts causing you trouble to check if it is overheating due to being overloaded for longer periods of time due to multiple devices using it all the time. On the thermal image of an Asus 300 Mbps wireless router above you can see a device that is used by just two computers and a tablet and is in normal operating conditions. Do note however that the thermal image is of the top of the WiFi router and even though it may be at normal temperature, the actual chips on the mainboard of the device will have a higher operating temperature for sure. If checking for an overheating router you should check the temperature of the components inside of the device as the temperature there could be a problem, not the one on the outside of the device.


Making a good espresso coffee is a kind of art for quite a lot of people, but even for these that just want to be able to drink good espresso coffee there are some simple rules that can help you get the best results. One of the important things when making an espresso coffee is the temperature of the water that goes through the grinded coffee beans to make your drink. It is recommended that the temperature of the water during the coffee extraction is between 85 and 95 degrees and what ends up in your cup and an espresso coffee will be with a lower temperature. We did an experiment with a Philips Saeco Xsmall espresso machine making a short espresso and measured the temperature of the resulting coffee in the cup using a thermal imaging camera. The temperature of the coffee in the cup was about 67 degrees Celsius, a temperature that is Ok for serving the coffee as most people prefer to have their coffee served at about 70 to 80 degrees Celsius, though some prefer lower temperatures. So it seems that this espresso machine is making the coffee ready for serving as soon as it is in the cup, however we suspect that the temperature of the water passing through the grinded coffee may be a bit lower than the optimal one we already mentioned above.