The YSI 626909 / 626910 ProDSS 4 Port Cable Assembly is available in lengths up to 100 meters. The sensor ports on ProDSS 4 port cables are universal, allowing for connection of ProDSS sensors in any sensor port. Connect ProDSS optical DO, turbidity, conductivity/temperature, pH, pH/ORP, nitrate, ammonium, and chloride sensors in any combination with the 626909, 626910 and 626911. The 626910/626911 features an integrated depth sensor. The depth sensor is mounted at the top of the bulkhead and does not take up one of the 4 available sensor ports. The 626909 does NOT include a depth sensor.