Apera Instruments SX716 Portable Dissolved Oxygen Meter Kit is designed for quick and reliable in-field measurement of dissolved oxygen (range: 0 to 20 mg/L; accuracy: ±0.3mg/L), suitable for applications in aquaculture, wastewater treatment, power plants, environmental monitoring, etc. The meter is featured with Apera’s proprietary polarographic DO electrode with built-in temperature and salinity sensors and a replaceable membrane cap. Only takes 5 minutes to polarize the electrode before measuring. The intelligent functions of the meter include automatic calibration for saturated oxygen and zero oxygen, automatic compensation for temperature and salinity, manual compensation for barometric pressure (altitude), data logging and recalling (100 sets storage), salinity calibration, automatic power off, etc. The meter is IP57 water resistant and comes with a complete test kit including all necessary accessories in a rugged carrying case.