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10
Temperature Measurement
For the measuring range, precision and absolute accuracy of the
internal and external temperature sensors refer to chapter 12.1.
10.1
Available External Temperature Sensors
The
FireStingO2
provides one port for an external temperature
sensor.
PyroScience
offers e.g. the dipping-probe temperature
sensor
TDIP15
(with 1.5 mm tip diameter) and the submersible
temperature sensors
TSUB21
(with 2.1 mm tip diameter,
completely Teflon coated) and
TSUB36
(with 3.6 mm tip diameter,
completely Teflon coated, shielded cable). The
TSUB21
and
TSUB36
are fully specified for long-term submersion into aquatic
samples, i.e. the complete sensor including the cable can be
submersed. In contrast, the
TDIP15
is only specified for long-term
immersion of the 100 mm long probe tip into aquatic samples.
However, the complete
TDIP15
including the cable is splash-proof
and withstands easily short-term submersion into water.
10.2
Internal Temperature Sensor
It is not advised to use the internal temperature sensor for
precision oxygen measurements.
The
FireStingO2
meter has also a built-in internal temperature
sensor for temperature measurements of the ambient air. If used
during calibration or during temperature compensation of the
oxygen readings in a gas sample or in air, ensure that the internal
temperature in the
FireStingO2
equals the ambient temperature in
air or in the gas sample (a certain degree of warming by the
instrument cannot be excluded!). It is advised to compare the
Internal Temperature Sensor reading with an External
Temperature Sensor connected to the
FireStingO2
or with an
external thermometer.
