Siemens Q Series

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

Siemens Q Series Specifications

General

Brand	Siemens
Model	Q Series
Category	Stud Sensor
Language	English

Summary

Q-Series Product Overview

Features

Application

Product Numbers and Accessories

Product Table

Detailed product numbers, accuracy, display, and output specifications.

Warning and Caution Notations

Important warnings and cautions for safe operation and handling.

Technical Design and Mechanical Aspects

Relative Humidity Design

Explanation of the capacitive sensing element for relative humidity.

Temperature Design

How the sensor measures temperature and its output signal conversion.

Configuration and Operational Behavior

Setting Element Configuration

Visual guide and explanation for configuring sensor jumpers.

Fault Behavior

How sensors behave and indicate faults in their output signals.

Mounting and Recalibration

Interior Mounting

Outdoor Mounting

Technical Specifications

Power Supply Specifications

Humidity Element Specifications

Specifications for the humidity sensing element, measurement range, and output.

Temperature Element Specifications

Specifications for the temperature sensing element and output.

Wiring and Dimensions

Wiring Terminals

Diagrams showing wiring terminals for different sensor models.