Stephan Alia - Temperature Sensor for Patient Tube System

®
3 Components and functions
© F. Stephan GmbH SA-112-0106V1.0-WEM-GB 43
3.6.3 Temperature sensor for patient tube system
The temperature sensor measures the temperature of the breathing gas
near to the temperature and constitutes the target parameter for
controlling the heating.
Fig. 38: Temperature sensor
The resistance of the thermistor bead integrated in the measuring tip
decreases with increasing temperature.
Temperature [°C] Resistance [kΩ]
15 7,855
20 6,246
25 5,000
30 4,028
35 3,265
Table 1: Resistance of the temperature sensor
The temperature sensor cannot be autoclaved!
The high temperature causes cracks in the measuring bead insulation.
Penetrating water can cause short circuits in the sensor and possibly
damage the heating control!
Please comply with chapter 8 of the A
LIA operating instructions!
A specially screened cable with a 5-pin "LEMOSA" plug connects the
temperature sensor to the ventilator.
This plug also connects the temperature sensor of the breathing gas
humidifier to the ventilator.
Caution