Scientific instrumentation for measuring sediment erodibility; Pollutant sensors; Scientific instrumentation for measuring nutrients in water; Scientific instrumentation for measuring nitrate plus nitrite, nitrite, phosphate, ammonia, total nitrogen, total phosphorus, and silicate in water; Sensors for measuring nutrients in water, not for medical use; Sensors for measuring nitrate plus nitrite, nitrite, phosphate, ammonia, total nitrogen, total phosphorus, and silicate in water, not for medi...

Water analysis; Water quality control services; Monitoring of water quality; Analysis of water quality; Detection of contaminants in water; Electronic monitoring and reporting of nutrients, phytoplankton, and contaminants in water using computers or sensors