Siemens QFA3171 Room Sensor for Temperature & Relative Humidity

The Q-Series Room Relative Humidity and Relative Humidity & Temperature Sensors monitor and transmit changes in humidity and temperature to the building control systems. These units are especially suited for applications where precise, stable humidity sensing is required.

Several models are available: humidity-only versions (with ±5% or ±2% accuracy) and humidity and temperature sensing versions (with ±2% accuracy).

Sensing models (with the display or full-featured) are also available.

The full-featured models offer a wide range of features and functionality that can be used with a variety of building control systems:

A two-line alphanumeric LCD allows simultaneous display of room temperature and relative humidity in degrees Fahrenheit or Celsius.

The sensor’s keypad allows error-free digital temperature setpoint adjustments in 0.5°F (0.2°C) increments. Setpoint values momentarily display as adjustments are made. The setpoint uses a matching current or voltage output signal.

Allows an occupant to change to an unoccupied control schedule during the unoccupied cycle for a pre-determined time period.

The QFA Series Outdoor Air Relative Humidity and Relative Humidity/Temperature Sensors monitor and transmit changes in humidity and temperature to the building control systems. Standard models available are 2% and 2% certified, for both humidity only and combination humidity with temperature sensing. Sensors are offered with either 4 to 20 mA or 0 to 10 Volt output signals.