AirOxi Aquacombo meter
The Aquacombo meter is the ideal measuring instrument for all grow out ponds and nurseries. You can simultaneously measure DO, temperature, Salinity, TDS and pH. By giving an input of salinity, you can also compensate for the DO reduction due to salinity.

Specification:
      pH D.O. Conductivity Salinity Temperature   TDS
Measuring Range Accuracy   2.0 ~ 12.0 pH +-0.1pH 0 ~ 30ppm +-1ppm 0 ~ 69.9 mS +-2% FS 0 ~ 42.0ppt +-1% FS 0 ~ 60.0 C +-0.5C 0 - 150  ppt

Usage instructions for better results