8.6.2 Marine or Brackish Installations

When installing the LevelVent or AquaVent in salt or brackish water or in a liquid having a specific gravity (density) different than fresh water, the density difference is compensated for by inputting the density of the monitored fluid in the Data Wizard (see Section 6.)

The LevelVent or AquaVent can be used for monitoring in salt or brackish water; however, long term use of the stainless steel body in salt or brackish water is not recommended, as the salt or other pollutants may cause pitting which can lead to perforation of the logger's casing. To minimize this effect, regularly lift the logger from the liquid; within seconds a thin protective layer will be formed by oxidation.

If using a LevelVent or AquaVent in a continuous salt/brackish monitoring scenario, the stainless steel body of the logger can be protected in a manner similar to the freezing protection method described in Section 8.6.1. The logger can be placed in a thick membrane balloon filled with non-corrosive/ non-toxic fluid, such as tap water. As pressure changes, the fluid encasing the logger will transmit the pressure differential to the pressure transducer.