In comparison to a classic PTZ system, dome cameras have a pan-tilt mechanism that is located inside the enclosure, allowing a better protection against external influences such as dust or damages. As a result, the dome camera can also be used in areas with a high risk of mechanical damages (IIC/IIIC). In addition, the camera has a protection level of IP68 and is hence dust and water proof.
“Usually, the camera’s dome is the weakest point as because of its concavity, the light is broken, delivering blurry pictures. This effect is mostly noted when using glass domes so it was not easy for us to find the right material. With Lexan – a polycarbonate – we found the perfect match. Other than regular polyester, it does not become milky and has excellent characteristics. Not only does it withstand even the lowest temperatures – it also exhibits superior optical qualities so that the picture is significantly less blurry than when using classic glass domes. In addition, Lexan is a very robust and tough material, allowing its usage in hazardous and explosive areas.”, says Steffen Seibert, managing director of SAMCON.
As the mechanical components of classic pan-tilt-zoom cameras are located outside the camera housing, this does not only negatively affect the size but also the weight. Due to their design, dome cameras are much lighter and easier to be installed. In addition, for classic pan-tilt-zoom cameras it is necessary to carry out a risk assessment for each individual camera which usually is not required for dome cameras. The most significant advantage of dome cameras, though, is the fact that they are maintenance-free, noticeably reducing the operating costs.
However, this is not the only advantage of dome enclosures: The design of the housing allows an easier heating and aeration of the camera. „If a camera is supposed to be used in environments with artic temperatures we install several PTC heating elements. By using two vents, we direct the warm air down to the bottom of the dome in order to keep it ice-free. The heating as well as the fans start automatically depending on the temperature. If necessary, the heating can also be initiated manually. By this measure it is possible to use the camera in temperatures, ranging between -50°C to +50°C .“, explains Steffen Seibert.
The ExCam IPQ6045 is available as of now and due to its modular design it can be easily adapted to meet the specific requirements. The IP camera has a 2 megapixel resolution at 1920 x 1080p and is certified according to the European (ATEX) regulations as well as to the international ones (IECEx). The ex-protected housing is suitable for ATEX group II for zones 1, 2 as well as 21 and 22, including the explosion group IIC / IIIC. It is also certified according to EAC-Ex.
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