The CSAT3CBL2-L is the RS-232 output cable used with the CSAT3 3-D Sonic Anemometer. A 25-foot length of this cable (i.e., CSAT3CBL2-L25) is shipped with each CSAT3. The CSAT3CBL2-L is offered as a replacement part, or for applications requiring longer cable lengths. Maximum recommended length is 50 feet. However, SRM-5A Short Haul modems can be used for applications that require an RS-232 interface cable that is longer than 50 feet.