Digital free-surface sensor for measuring humidity and temperature including sensor sleeve and 15 m sensor cable 4x1mm. By using digital technology and taking the cable cross-section into account, the sensor cable can be extended up to 500m. Technical data: Protection class: IP 67, ambient temperature sensor: -30°C to +70°C, sensor dimensions: D = 87 mm H = 74 mm, sensor sleeve dimensions: D = 93 mm H = 98 mm