Orbit Technologies offers water quality instruments [WQ] from YSI Incor-porated, USA - pure data for healthy planet. This includes: water quality instruments [WQ] - lab and field instruments for water quality parameters such as DO/BOD [OUR/SOUR]/ conductiviry/pH; Environmental monitoring systems [EMS] - multi parameter monitoring systems for pH/ORP/conductivity/tempearture/depth/vented level/open-channel flow/salinity/NO3/NH4/chloride/chlorophyll/rhodamine WT/velocity. These systems are used for unattended monitoring, sampling, profiling and logging applications. These systems can be deployed in natural waters for more than 60 days for continuous data-logging.