Import and sales of environmental instrumentation. Such as measuring water quality Measuring oxygen DO Meter Gauge acidity pH Meter measurement of chlorine Chlorine Meter tools, measuring O RP ORP Meter measurement of conductivity Conductivity Meter Gauge sedimentary TDS Meter Turbidity Meter Turbidity Meter. measure BOD BOD measurement COD COD meter suspensions SS / MLSS anemometer anemometer wind speed.