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TELEDYNE ELECTRONIC TECHNOLOGIES
Analytical Instruments
SECTION TEN E
FFECT OF
TEMPERATURE
The Teledyne Electronic Technologies Analytical Intruments sensors adjust for ambient temperature
changes in the range of 0 - 40ºC (32 - 106ºF). Since the thermistor that compensates for these
changes is located in the rear of the sensor assembly, it is impor tant that gas mixtures, flowing
over the front of the sensor, be at room temperature. Reading errors may occur if hot gases from a
heated humidifier are directed past a sensor teed into a breathing circu it.
A small thermal tracking error may be encountered in ap plications where the entire sensor
assembly is placed in the gas mixture to be analysed (e.g incubators). No adjustm ents should be
made during this period (about 1 to 2 hours), since this error will be eliminated when both the
thermistor and sensing electrode have had sufficient time to come to ther mal equilibrium.