4/4
Siemens Building Technologies
Room temperature sensors QAA24, QAA25, QAA26, QAA27
CM1N1721E
HVAC Products
12.07.2003
Housing front
ASA+PC, NCS S 0502-G (white)
Botton section of housing
ASA+PC, NCS 2801-Y43R (grey)
Base
PC, NCS 2801-Y43R (grey)
Sensor (entirely)
silicon-free
with packaging
approx. 0,1 kg
Sensing element
1)
LG-Ni 1000 (thin-film element)
Time constant
7 min (depending on air movement and thermal
coupling to the wall)
1) QAA25...27 from serie B on with thin-film element
QAA25
QAA26
QAA27
Setpoint setting range
5...35 °C
5...30 °C
±
3 K
Resistance range
95...685
Ω
1000...1195
Ω
1000...1175
Ω
Resistance value at setpoint
0 K 1091
Ω
10 °C
193,9
Ω
1039
Ω
20 °C
390,0
Ω
1118
Ω
25 °C
488,3
Ω
1157
Ω
30 °C
586,7
Ω
1195
Ω
Internal diagram
B
M
LG-Ni 1000
17
21
G
0
1
17
21
G
0
2
LG-
Ni 1000
R
B
M
LG-Ni 1000
B
M
R
M
17
21
G
0
3
B1
Room temperature measuring signal
M
Measuring neutral
R
Setpoint signal
Dimensions
90
100
°C
32
36
4,2
9,
5
56
60
56
60
17
2
1M
01
Dimensions in mm
Materials and colors
.
.
.
.
Weight
Sensor
Setpoint setting knob
QAA24
QAA25, QAA26
QAA27
Legend
ã
2001 Siemens Building Technologies AG
n
