Siemens Building Technologies Outdoor and Surface Temperature Sensors Data Sheet
Outdoor and Surface Temperature
Sensors — Various Outputs
Standard
Temperature Sensors
Pipe Surface Temperature SensorOutdoor Temperature Sensor
Description
Standard temperature Sensors monitor and transmit
changes in temperature to the building control system.
Specic devices within the range are compatible with most
North American building automation systems. All sensors
incorporate precision temperature sensing elements to
accurately and reliably measure temperature.
Features
• Variety of output signals available
• Outdoor sensors are ruggedly constructed for use in all
climates
• Responsive to temperature change
• Accurate and reliable indication of temperature
• Simple installation requires no special tools
Applications
Outdoor temperature sensors are used to monitor the
temperature of outdoor air. This variable is often used in a
variety of HVAC control strategies, including outdoor reset
and building ventilation.
Pipe surface temperature sensors are often used in place
on immersion type sensors, particularly in cases where
sensor installation occurs after the system if lled.
E-21
Sensors
www.usa.siemens.com/hvac
Standard Outdoor Temperature Sensor Specifications
E-22
Sensors
Output Signals
Active.......................................................................................... 4-20mA
Passive .................................................................... Pt 1k Ω (375 alpha)
Pt 1k Ω (385 alpha)
Ni 1k Ω @32F
Ni 1k Ω @70F
NTC 100k Ω
NTC 10k Ω Type II
NTC 10k Ω Type III
Accuracy
NTC Thermistors, mid-range ......................................... ±1.0°F (±0.5°C)
Pt RTD and Ni RTD, mid-range ................................... ±0.75°F (±0.4°C)
Standard Outdoor Temperature Sensor Product Ordering
Application Output Signal Part Number Range Data Sheet
Outdoor Air
Temp Sensor
Surface Mount
Pipe Temp
Platinum 1k Ω 375 alpha 544-578 Controller Dependent 149-261P25
4-20 mA 536-768 -58 to 122F 149-263P25
Nickel 1k Ω @ 32F QAC2020U
Nickel 1k Ω @ 70F QAC2021U 149-920
NTC 100k Ω Type 2 536-778 149-262P25
NTC 10k Ω Type 2 QAC2030U 149-920
NTC 10k Ω Type 3 QAC2032U 149-920
Platinum 1k Ω 385 alpha QAC2012U 149-920
Platinum 1k Ω 375 alpha 544-089 Controller Dependent 149-261P25
4-20 mA 536-780 30 to 250F 149-263P25
Nickel 1k Ω @ 32F QAD2020U
Nickel 1k Ω @ 70F QAD2021U 149-918
NTC 10k Ω Type 2 QAD2030U 149-918
NTC 10k Ω Type 3 QAD2032U 149-918
Platinum 1k Ω 385 alpha QAD2012U 149-918
Controller Dependent
Controller Dependent
149-920
149-918
www.usa.siemens.com/hvac
Loading...