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Q-Series
Relative Humidity and
Relative Humidity &
Temperature Sensors for
Critical Environments
and Outdoor Air
Description
Features
Application
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.
• 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)
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
Technical Instructions
Document No. 155-755
February 28, 2013
Siemens Industry, Inc.
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Summary of Contents for Siemens Q Series
- Page 1 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 Siemens Industry, Inc.
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Page 2: Product Numbers
Warning/Caution Notations WARNING: Personal injury, or loss of life may occur if you do not perform a procedure as specified. CAUTION: Equipment damage may occur if you do not perform a procedure as specified. Page 2 Siemens Industry, Inc. -
Page 3: Ordering Information
For the QFA41 Series, the cable entry is made via the circular connector, which consists of a coupling piece with M16 thread and a connector with a screwed plug. The coupling piece is secured to the housing and internally wired. The sensor is designed for wall mounting. Siemens Industry, Inc. Page 3... -
Page 4: Engineering Notes
Electrical interference increases the longer the cables run parallel and the smaller the Selection distance is between them. Use shielded cables if necessary. Twisted pairs of cables are required for the secondary supply lines and the signal lines. Page 4 Siemens Industry, Inc. -
Page 5: Mounting Notes
• Delivery and invoicing of the new AQF4150 measuring tip, complete with calibration certificate. • Delivery of a calibration certificate for the (old) measuring tip returned to Siemens Building Technologies, Inc. enabling the customer to assess the time of usage of the measuring. -
Page 6: Specifications
IP 65 (NEMA 4) Conforms to EMC Directive 89/336/EEC Agency certification UL Listing UL873 XAPX cUL Listing Canadian Standard C22.2 No. 24-93 Conforms to Australian EMC Radio Communication Act 1992 Framework Radio Interference Emission AS/NZS 3548 Standard Page 6 Siemens Industry, Inc. -
Page 7: Wiring Terminals
QFA4160/QFA4160D QFA4171/QFA4171D Figure 3. Wiring Terminals. QFA4160/QFA4160D Front View: Connector QFA4171/QFA4171D Front View: fitted, body removed Connector fitted, body removed Figure 4. Connectors. Dimensions Figure 5. QFA31 Series Sensors with AQF3100 Dimensions in Inches (Millimeters). Siemens Industry, Inc. Page 7... - Page 8 Information in this publication is based on current specifications. The company reserves the right to make changes in specifications and models as design improvements are introduced. Product or company names mentioned herein may be the trademarks of their respective owners. © 2013 Siemens Industry, Inc. Siemens Industry, Inc.