Made from superlight ripstop nylon, this 3.5 in. thick deluxe inflatable pad packs down small, and is light and durable enough for backpacking X-Static® synthetic insulation provides superior warmth and comfort; X-Static has antimicrobial properties that help keep odors at bay and enhance thermal regulation Internal heat reflective polyurethane coating returns heat back to your body for additional warmth Integrating vertical and horizontal tubes in the construction, this seam-welded pad provides consistent airflow for stability, support and smooth feel For quick inflation/deflation, Big Anges Insulated Q-Core SL pad features an airtight, nonbreakable brass valve with plastic coated mouthpiece Comes with a stuff sack and a repair kit View all Big Agnes Sleeping Pads 3.5 x 9 inches / 3.5 x 9.5 inches / 3.5 x 8.5 inches / 6 x 10 inches 72 x 20 x 3.5 inches / 78 x 20 x 3.5 inches / 66 x 20 x 3.5 inches / 78 x 25 x 3.5 inches 1 lb. 1 oz. / 1 lb. 2 oz. / 1 / 1 lb. 7 oz.

Beth Parker and John Cherry are leading a team of researchers at the G360 Centre for Applied Groundwater Research at the University of Guelph, Guelph, Ontario, Canada (www.g360.uoguelph.ca), who are using the Shaw Portable Core Drill (Shaw Drill) for installation of monitoring wells in bedrock. To date wells have been installed in dolostone near Guelph for study of groundwater hydrology with emphasis on groundwater-river interactions, and in sandstone near Simi Valley (Los Angeles area), California for monitoring groundwater conditions at seeps and springs on mountain slopes with emphasis on a search for organic contaminants. The borings for monitoring wells have a diameter of either 1.65 inches (41 mm) or 2.00 inches (51 mm). The design of the monitoring wells is unique to accommodate small diameter borings. In the two inch borings, the well casing has inside diameter of 0.90 inches, which allows use of self- contained pressure transducers (i.e., Schlumberger Micro-Diver Model DI601) for monitoring hydraulic head.

The Shaw Drill has proven to be effective and reliable in these studies. It has made possible installation of monitoring wells at locations where larger drills present great difficulty of access. Use of the Shaw Drill has minimized disturbance to the terrain in ecologically sensitive areas. The borings drilled so far using the Shaw Drill have ranged from 5 to 32 feet below ground surface. Deeper drilling is likely feasible. The University of Guelph in collaboration with Shaw Tool is continuing research and development to extend the capability of this drilling method in groundwater investigations and also for creation of small-yield drinking water wells to supply remote areas in North America and developing countries. Copyright © 2011 Shaw Tool Company. Shaw tools are protected by U.S. Patent No. 6,102,135 and patents pending Solar cable is the interconnection cable used in photovoltaic power generation. A solar cable interconnects solar panels and other electrical components of a photovoltaic system.

Solar cables are designed to be UV resistant and weather resistant. It can be used within a large temperature range and are generally laid outside. One common factor for most of the photovoltaic power systems is outdoor use, characterized by high temperatures and high UV radiation. Single-core cables with a maximum permissible DC voltage of 1.8 kV Umax. vizari backpackThe phase to ground DC voltage rating must be Uo1.5kVDC and a temperature range from -40 °C to +90 °C ambient, 120 °C on the conductor for 25 year service life against thermal ageing. backpack dpuAmbient temperature and conductor temperature is derived from the Arrhenius law for ageing of polymers - ageing of polymers doubles for every 10 °C rise.ppb backpack straps

DC string cables must be class II double insulated to protect against short circuits and ground faults. A three-core AC cable is used for connection to the grid if a single-phase inverter is used, and a five-core cable is used for three-phase feed-in.[1] Referred to as the Main DC, larger power collector cables are used to interconnect from the Generator box also referred to as the DC combiner to the central inverter. tccc backpackThese cables must be shielded when over 50m in length (IEC62548). pacsafe 140l backpack protectorCentral inverters are large frequency converters and unshielded cables would cause EMC issues throughout the whole solar farm which can behave like a capacitor.zuca backpack makeup The cable's insulation must be able to withstand thermal and mechanical loads. invacare cylinder backpack

As a consequence, plastics which have been cross-linked using an electron beam are increasingly used today. The insulation and jacket materials are extremely resistant to weathering, UV-radiation and abrasion . Additionally, it is salt water resistant and resistant to acids and alkaline solutions. It is suitable for fixed installation as well as for moving applications without tensile load. It is especially designed for outdoor use, which means direct sun radiation and air humidity, but due to the halogen free flame retardant cross-linked jacket material the cable can also be installed in dry and humid conditions indoors. Individual modules are connected using cables to form the PV generator. The module cables are connected into a string which leads into the generator junction box, and a main DC cable connects the generator junction box to the inverter. In order to eliminate the risk of ground faults and short circuits, the positive and negative cables, each with double insulation, are laid separately.