Q-Series
Technical Instructions
Document No. 155-755
February 28, 2013
Relative Humidity and
Relative Humidity &
Temperature Sensors for
Critical Environments
and Outdoor Air
Siemens Industry, Inc.
Description
The Q-Series Relative Humidity and Relative Humidity & Temperature Sensors for
Critical Environments and Outdoor Air monitor and transmit changes in humidity and
temperature to the building control systems.
Features
• Operating voltage 24 Vac/13.5 to 35 Vdc
• Signal output 0 to 10 Vdc/4 to 20 mA for relative humidity and temperature
• Very high measuring accuracy across the entire measuring range
• Capacitive humidity measurement
• Precise, stable humidity sensing
• Available in 2% and 2%, certified models
• Optional display
• Recalibration service available (QFA41 Series only)
Application
The Q-Series Outdoor Air rh and rh/T Sensors are for use in HVAC applications where
high accuracy and short response times for measuring relative humidity are required.
The measuring range covers the entire humidity range of 0 to 100%. Some application
examples:
• Storage and production facilities in the paper, textile, pharmaceutical, food, chemical
and electronics industry, etc.
• Laboratories
• Hospitals
• Computer and EDP centers
• Greenhouses
• Outdoor use requires AQF3100 Outdoor Mounting Kit
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