Thermo Scientific AquaSensors
™
AquaTrace
™
Trace DO System User Guide
7
System Specifications:
Wetted Materials.........................Sample Chamber –Acrylic, Viton, 316 Stainless Steel
Sensor – PEEK, 316 Stainless Steel, Viton, FEP
Operating Temperature ..............5 to 50°C (40 to 120°F)
Maximum Pressure.....................60 psi supply
Sample Flow Rate ......................50 to 400 mL/min (0.8 to 6.3 gal/hr)
Measuring Range .......................0.1 ppb to 20 ppm
Resolution ..................................0.1 ppb / 0.01 ppm
2.2 Sensor Description
The Thermo Scientific AquaSensors Trace DO sensor uses the amperometric measurement technique
to maximize lifetime in continuous industrial applications. The sensor is easily maintained and
reconditioned by replacing the convenient pre-tensioned membrane cap and electrolyte. The sensor
includes an integral temperature element that is closely coupled to the process sample to insure an
accurate measurement.
The sensor head is pre-calibrated for span and the zero is factor set. The integral electronics in the
sensor head retain calibration data and the sensor does not require a new calibration when the system
is installed, although it is recommended that a sample calibration be performed at the typical service
range to maximize accuracy during operation.
The Trace DO sensor uses the DataStick sensor system. The DataStick consists of a standard sensor
body, an interchangeable sensor head, and a communications adapter. The sensor head threads into
the front of the DataStick sensor body. The DataStick body’s internal electronics work with the sensor
head to calculate the measurement values. The communications adapter assembles into the back end
of the DataStick body and transmits the measurement data using one of several standard
communication protocols.
The sensor is designed for continuous use and has 1-inch NPT mounting threads for installation into
the sample chamber adapter. The parts of the sensor system are shown here:
