Siemens QFA3200 Series Sensors; Designed for Room Humidity and Temperature

The QFA3200 Series Room Sensors, manufactured by Siemens Building Technologies, are produced for use with Siemens T.E.C.’s (Terminal Equipment Controllers). These devices combine sensors for relative humidity and temperature in one housing to advance room aesthetics and decrease installation time. 

Siemens QFA3280.DWSC

The controller and sensor communicate via an RJ-11 connection for simple, mistake-free wiring. The housings also include an RJ-11 tool port at the bottom for connecting to the Siemens platform configuration, and start-up tools at installation. 

Speaking of installation, these sensors include all necessary hardware for standard mounting in a 2”x 4” electrical box, with straightforward instructions. These include the trim rings and matching gaskets, screws, and anchors which are provided for wall-mounting. 

There are 3 variations regarding the display. The 4-character code at the end of the part number beginning with “D” indicate it has an LCD Display, while the “E” indicates No Display (to prevent unauthorized adjustments), and the “F” indicates Full HMI. 

(You can find a link to the datasheet here.)

Here are a few more technical specifications of the QFA3200 Series

Measurement range humidity: 0-100% Relative Humidity

Operating voltage:  P1 connection to TEC

Analog outputs: P1 (BACnet TEC)

Measuring range temperature: 32 to 122°F; 0 to 50°C

Measurement accuracy:  Temperature: +/- 0.9°F;  Humidity: +/-2% between 10 to 90% RH, +/-3% outside this range

Communication: For use with BACnet TEC controller only

Dimensions (W x H x D): 5.25" x 3.0" x 3.75"

*Siemens Building Technologies offers a 2-year warranty on this series.

Please check out E-Controls.net for the QFA3200 Series of Relative Humidity & Temperature Sensors, or any other Combination RH/Temperature Transmitters. 

E-Controls.net: “Your Online Source For Building Automation Supplies”.

Greystone’s HRC series: A highly accurate RH sensor with low profile enclosure.

Designed especially for monitoring room relative humidity levels, the HRC Series from Greystone Energy features many choices such as 2, 3 and 5% accuracy, and an assortment of available precision temperature sensors.   Optional selections are available for override, set-point adjustment, status LED or LCD display, AC/DC operation and field selectable outputs make this series completely configurable to meet your exact requirements. 

Along with high accuracy sensing, the HRC features a sleek, low profile, white ABS IP30 (Nema 1) enclosure.  This can mount directly to a single gang electrical box or directly to a wall.  The back plate enlists multiple mounting holds for connection to various electrical boxes, and a terminal block connection is provided for connection to the Building Automation System.

See the chart below to complete the part number you need for the HRC.

The HRC series is available at E-Controls.net; Your Online Source for Building Automation Supplies.