Click here to enlarge The HS (High Security) series constitutes KWs standard freezer line at -85°C; the PL (Premium Line) series represents excellence in very-low-temperature freezers for laboratory use. The HSL (High Security Light) series constitutes KWs standard freezer line at -45°C; the PLL (Premium Line Light) series represents excellence in low-temperature freezers for laboratory use. The difference between both lines is in the control system and some components that, in the PL and PLL versions, drive equipment reliability even higher, and thus the security of the products stored there, through exclusive and very innovative technical solutions. KW, through a careful and complex research and development plan, has manufactured this completely new series of PREMIUM LINE ultra-freezers at -85 °C, which constitute a super solution, or superior quality with respect to the already high standard of the HS series. These KW ultra-freezers have renovated design and, in some aspects, functionality, such as the NEW ICE AGE KW CONTROL® and 4 KVA voltage regulator. They are built with refrigeration systems without the use of CFCs or HCFCs, which are ozone-depleting gases. The quality of these products, as indicated by all users, is highlighted by the technical innovations KWs design staff introduced in the model series. KWS PREMIUM LINE has the CE certification; it complies with UNI EN 61010 (CEI 66-5) Regulations on safety for laboratory equipment; it has been designed and built according to the procedures of the ISO 9001:2000 quality system.