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Multi-parameter probe for measurement of groundwater or surface water. Custom systems for quality assurance of groundwater samples known as Low Flow Sampling. The TROLL 9500 is available in different models with or without an integrated memory or logging capabilites. The models without the logger is primarily used for sampling and vertical measurement. The model that includes the logger can log data for longer depending on the parameters being measured. Sensors are available for level, temperature, pH / Redox, Conductivity, Oxygen, turbidity, etc. Datasheet   Sensor overview  

The Aqua TROLL ® 200 measures water level, temperature and conductivity. Aqua TROLL ® 200 is a powerful loggers with many options. Titanium casing allows it to be used in polluted and seawater. The Aqua TROLL ® 100 is a simpler model that only measures the conductivity and temperature.In-situ's software Win-Situ 5 has received a great deal of recognition for its simple interface and is included as standard to a number of computers. You can also use the In-Situ Rugged Reader PDA's or buy the license to the Win-Situ Mobile to use it on another PDA.

The Aqua TROLL 400 Multiparameter Instrument is ideal for monitoring water quality in a variety of environmental applications. The compact instrument houses six water quality sensors and measures 12 parameters: Actual and specific conductivity, salinity, total dissolved solids, resistivity, and density Dissolved oxygen ORP pH Temperature Water level and water pressure (absolute)