5 instrument overview, Instrument description, 6 system components – In-Situ Aqua TROLL 400 Operators Manual User Manual
Page 10: Instrument overview, System components

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Instrument Overview
Instrument Description
The Aqua TROLL 400 Instrument is a multiparameter water quality probe. The
dissolved oxygen, conductivity, pressure, and temperature sensors are integrated into
the instrument. The pH/ORP sensor and the RDO Sensor Cap are replaceable.
The instrument is intended for use with a PLC/SCADA system or other data-logging
device. It does not include internal power or an internal data logger. The instrument
provides Modbus RS485 and SDI-12 interfaces for use with an external controller.
System Components
The system includes the following components.
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Integrated sensors: RDO, conductivity, pressure, and temperature
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Plug-in pH/ORP sensor
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RDO Classic Sensor Cap
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Stainless steel restrictor
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Calibration cup
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Battery pack and cable
Accessories purchased separately
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Replacement RDO Classic Sensor Cap
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Replacement pH/ORP sensor
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Calibration Kit (includes calibration cup, 3 sponge wafers, vented cap, and
storage cap)
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Stripped-and-tinned cable—length customizable
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Maintenance kit
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Comm Kit (includes Communication Device and Comm Kit Software for
communications setup and instrument calibration)