Ammonia Sensor (MTI.WQMS.PBS.301NH3) MP301 multi-parameter online analyzer: suitable for long-term on-line online monitoring, measuring up to 7 parameters simultaneously, including: Temperature, Depth, pH, ORP, Conductivity & Salinity & TDS, Turbidity, DO, Chlorophyll, Blue-green algae, Ammonia nitrogen, Nitrate nitrogen, Chloride ions, Fluoride ions. Optional accessories such as bluetooth module, battery pack, and handheld communicator are also available for easy portable measurement.