... high-speed photoelectric switch, developed and manufactured by Shanghai Sunny Elevator Co.,Ltd, adopt infrared detection technology to make the response ... Switch1 x User Manual About usShanghai Sunny Elevator ASSembly Co.,Ltd, foundh in 1992, is a 21-year professional ... elevator buttons. The company has a complete set of equipment and instruments in terms of mechanism, sheetmetal, plastics, moulding ...