DO/Cond/Temp 20m Cable Electric Conductivity Range 0 to 200 mS/cm (Auto Range) TDS Range 0 to 100g/L TDS Constant Range 0.30 to 1.00 (0.65 Default) Dissolved Oxygen Range 0 Percent to 500 Percent Air Saturation in 0 to 50mg/L Oxygen Concentration 0 to 50mg/L Waterproof Yes Automatic Temperature Compensation Yes Displayed Temperature Range -5 Degrees to +55 Degrees C Salinity Range 0 to 70 ppt Operating Temp Range (F) 32.9 Degrees to 131 Degrees F