Tianjin Wiseman Optical Instrument Co., Ltd specializes in the designing and manufacturing of survey instruments and audio visual educational instruments. Our formal name is Tianjin Optical Instrument Factory No.2, who was established in early 1950&＃039;s and is the first one to make auto levels in China. We have experienced engineering team capable of optical, eletronic and machanical designing. Our current products include theodolite, automatic levels and automatic slide projectors. We have our own optical processing workshop that can process different lenses. Our products are selling well in domestic market and are also sold to Southeast Asia, Middle East, Europe and America due to reliable quality and good services. We got ISO9001 by TUV in 2002. We are also distributor of different brand foreign made optical products in China. Being one of the leading manufacturers of precision survey instruments in China all our stuffs wish to provide our best service to users all of the world with advanced technology and excellent quality products. We welcome users all of the world to develop long term business with us.