Brochure
7
www.usa.siemens.com/hvac
Part Number Output Range Category Power Housing
RTD 1K Ni at 32º F
RTD 1K Ni at 70º F
RTD 1K Pt (385)
RTD 1K Pt (375)
NTC 10K Type II
NTC 10K Type III
0 to 10 Vdc
4 to 20 mA
Setpoint / Override
Bi-Metal Display
LCD Display
Degree F
Basic
Standard
Certified
24 Vac
24 Vdc
Metal
Polycarbonate
QAA2312.EWNN
n
55 to 95
n n
QAA2320.EWNN
n
55 to 95
n n
QAA2321.EWNN
n
55 to 95
n n
QAA2330.EWNN
n
55 to 95
n n
QAA2332.EWNN
n
55 to 95
n n
QAA2312.BWNN
n n n
55 to 95
n n
QAA2320.BWNN
n n n
55 to 95
n n
QAA2321.BWNN
n n n
55 to 95
n n
QAA2330.BWNN
n n n
55 to 95
n n
QAA2332.BWNN
n n n
55 to 95
n n
544-973
n
55 to 95
n n
540-984
n
55 to 95
n n
Room Temperature Sensors
Part Number Output Range Category Power Housing
RTD 1K Ni at 32º F
RTD 1K Ni at 70º F
RTD 1K Pt (385)
RTD 1K Pt (375)
NTC 10K Type II
NTC 10K Type III
0 to 10 Vdc
4 to 20 mA
Setpoint / Override
Bi-Metal Display
LCD Display
Degree F
Basic
Standard
Certified
24 Vac
24 Vdc
Metal
Polycarbonate
QAC2012U
n
-40 to 240
n n
QAC2020U
n
-40 to 240
n n
QAC2021U
n
-40 to 240
n n
QAC2030U
n
-40 to 240
n n
QAC2032U
n
-40 to 240
n n
QAC2012
n
-58 to 158
n n
QAC2030
n
-40 to 158
n n
QAC3161
n
-58 to 122
n n n n
QAC3171
n
-58 to 122
n n n
QAC22
n
-58 to 158
n n
536-768
n
-58 to 122
n n
Available in a variety of signal
types, outdoor air temperature
sensors monitor and transmit
changes to building control
systems. In addition to
acquiring outside temperature,
outdoor air sensors measure
wind, wall temperature, and
solar radiation, to help keep
heating systems working
efficiently. Active output
signals in 0 to 10 Vdc or 4 to 20
mA and numerous resistive
signals output versions in 10K
Ohm NTC or 1K Ohm Platinum
(375 and 385) RTD ensure
compatibility.
QAA2330.EWNN QAA2330.BWNN
QAC2012QAC3161
These sensors provide precise,
stable temperature sensing,
ensuring the highest possible
level of comfort. The sensor’s
resistance varies with the
actual room temperature
being measured.
Flush mount sensors
(544-973 and 540-984)
incorporate a temperature-
sensing element (10K Ohm
Type II Thermistor, or 1000
Ohm RTD) behind a blank,
stainless steel or plastic switch
cover plate for seamless wall
integration.
Outdoor Air Sensors
544-973
QAC2012U