â¤[100 LEDs Super Bright Solar Lights Outdoor]The enhanced outdoor solar sports induction lights have 100 LEDs beads,which provide excellent lighting of up to 600 lumens,equipped with a precise Body temperature sensor turn,can immediately illuminate an area and maintain a longer brightness,Strong lighting emission brightens your way home. Solar Sensor Wall Light,Solar Powered Led Wall Light,Solar Waterproof Wall Light,Solar Outdoor Wall Lights Ningbo Wason Lighting Technology Co.,Ltd , https://www.wasonlight.com
☀[270 ° Wide Illumination Angle ]Compared with most similar solar lights on the market, this solar sports induction lights with a motion angle of 270 degrees, , providing Brighter, longer, wider angle illumination.Suitable for outdoor use with balconies, terraces, staircases, gardens, external walls, yard, path, front doors, garages, driveway porches, and lawns, fences, etc
â¤[3 Lighting Modes & PIR motion sensor]There are 3 various modes you can choose. 1.Human body induction mode; 2.Human body interaction + slight light mode; 3.Slight light mode. Please long press the button on the top for 1s to enter another mode.New PIR motion sensor system and the 180owide-angle motion sensor detects motion up to 10-17 ft, it convenience and security to your garage, yard, path.
☀[WATERPROOF IP65 & Easy installation]These solar lights outdoor are IP65 waterproof, are made of high quality ABS, not afraid of outdoor dust and rain. The solar lights can work well even in extreme weather conditions.No annoying wires or adapters needed, the installation is super easy .Just simply find a place with sufficient sunshine and fix the light with supplied screws onto it. the ideal installation height is about 2 to 3 meters, and completed in just a few minutes.
Roots pump structure and working principle
In the Roots pump chamber, two "8" -shaped rotors are mounted perpendicular to each other on a pair of parallel shafts and are rotated synchronously by a pair of gears having a gear ratio of 1 in opposite directions. Between the rotors, between the rotor and the pump housing to maintain a certain gap, you can achieve high-speed operation. As Roots pump is a type of vacuum pump without internal compression, the compression ratio is usually low, so the high and medium vacuum pumps require a foreline pump. Roots pump ultimate vacuum in addition to depend on the pump structure and manufacturing accuracy, but also depends on the foreline pump ultimate vacuum. In order to increase the pump ultimate vacuum, Roots pumps can be used in series. Roots pumps work like Roots blowers. Due to the constant rotation of the rotor, the drawn gas is sucked into the space v0 between the rotor and the pump housing through the air inlet and then discharged through the air outlet. Since inhaled v0 space is completely closed state, so the gas in the pump chamber is not compressed and expanded. However, when the top of the rotor rotates over the edge of the exhaust port, when the v0 space communicates with the exhaust side, part of the gas bounces back into the space v0 due to the higher gas pressure on the exhaust side, causing the gas pressure to suddenly increase. When the rotor continues to rotate, the gas is discharged outside the pump. For Roots pump rotor from 0 ° to 180 ° of the extraction process. In the 0 ° position, the lower rotor encloses v0 volume of gas from the pump inlet. When turned to the 45 ° position, the chamber communicates with the exhaust port. As the exhaust side of the higher pressure, causing part of the gas back to punch over. When turned to the 90 ° position, the gas enclosed by the lower rotor is vented to the pump together with the backflushing gas. At this time, the upper rotor is also filled with v0 volume of gas from the pump inlet. When the rotor continues to turn to 135 °, the gas enclosed in the upper rotor communicates with the exhaust port, and the above process is repeated. The 180 ° position is the same as the 0 ° position. A total of four v0 volume of gas is discharged during one revolution of the rotor shaft.