Description for Siemens QFA3001.WU

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. The new Q-Series sensors use the same housing as their Series 1000 predecessors, but with a totally new internal circuit design and sensing element. Several models are available: humidity only versions (with 5% or 2% accuracy) and humidity and temperature sensing versions (also with 5% or 2% accuracy). Figure 1. Q-Series Room Relative Humidity and Relative Humidity & Temperature Sensor. The humidity only units have either a 4 to 20 mA or 0 to 10 Vdc output signal. The combination humidity and temperature units have a current or voltage humidity output, with the temperature output being a matching current or voltage signal. Sensing models (with 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: Liquid Crystal Display (LCD): A two-line alphanumeric LCD allows simultaneous display of room temperature and relative humidity in degrees Fahrenheit or Celsius.Digital Temperature Setpoint Adjustment: The sensor?s keypad allows error-free digital temperature setpoint adjustments in 0.5F (0.2C) increments. Setpoint values momentarily display as adjustments are made. The setpoint uses a matching current or voltage output signal.Override Button: Allows an occupant to change to an unoccupied control schedule during the unoccupied cycle for a predetermined time period. All 2% versions allow the sensing element to be removed and replaced if needed. Siemens sensors with replaceable elements are ideal for applications where measurement accuracy is critical and sensor replacement is not an option. Replaceable sensing elements eliminate the need for accuracy adjustment.