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Temperature and Air velocity transmitter DUW 221


Key Point:

  • Measuring range from 0 to 30 m/s and from 0 to 50 °C
  • 0-10 V or 4-20 mA output, active, power supply 24 VAC/VDC (3-4 wires)
  • ABS VO housing, 1P65, with or without display
  • Alternating display of air velocity and temperature
  • "1/4 turn" system mounting with wall-mount plate
  • Housing with simplified mounting system

Temperature and Air velocity transmitter DUW 221
Temperature and Air velocity transmitter DUW 221
Material: ABS VO as per UL94
Protection: 1P65
Display: LCD 10 digits. Size: 50 x 17 mm Alternating display of air velocity and temperature
Height of digits: Values: 10 mm Units: 5 mm
Cable gland: For cable 08 mm maximum
Weight: 164 g
Cable of remote probe: length 2 m and 0 4.8 mm in PVC



To order, just add the codes to complete the part number:

Example: DUW 221 - A0D150

DUW 221 temperature and air velocity transmitter, active 4-20 mA, with display and remote probe of 150 mm length.

Measuring range From 0 to 50 °C (possibility to set the output on the following ranges: from -20 to +80 °C, from -50 to +50 °C, from 0 to +100 °C and from 0 to +200 °C)
Accuracy ±0.3% of reading ±0.25 °C
Unit of measurement °C, °F
Response time 1/e (63%) 5 s
Type of sensor Pt100 1/3 DIN
Resolution 0.1 °C
Type of fluid Air and neutral gases
*All the accuracies indicated in this technical datasheet were stated in laboratory conditions, and can be guaranteed for measurements carried out in the same conditions, or carried out with calibration compensation.
Output ssettings From 0 to 5m/s, from 0 to 10 m/s, from 0 to 15 m/s, from 0 to 20 m/s and from 0 to 30 m/s
Accuracy* From 0 to 3 m/s: ±3% of reading ±0.05 m/s From 3 to 30 m/s: ±3% of reading ±0.2 m/s
Unit of measurement m/s and fpm
Response time 1/e (63%) 2 s
Resolution From 0 to 3 m/s: 0.01 m/s From 3 to 30 m/s: 0.1 m/s
Type of fluid Air and neutral gases
Output / Power supply Active sensor 0-10 V or 4-20 mA (alim. 24VAC/VDC ± 10%), 3-4 wires. Common mode voltage <30 VAC
Maximum load: 500 Ohms (4-20 mA) / minimum load: 1 K Ohms (0-10 V)
Consumption 3 VA (0-10 V) or 3 VA (4-20 mA)
European directives 2004/108/EC EMC; 2006/95/EC Low Voltage; 2011/65/EU RoHS II; 2012/19/EU WEEE
Electrical connection Screw terminal block for cables from 0.05 to 2.5 mm2 or from 30 to 14 AWG Carried out according to the code of good practice
PC communication USB-mini DIN cable
Environment Air and neutral gases
Conditions of use
From 0 to +50 °C. In non-condensing condition. From 0 to 2000 m.
Storage temperature From -10 to +70 °C

An easy and friendly configuration with the software!

You can configure your own intermediary ranges.

Example: fora 0-30 m/s transmitter, the minimum delta of the range is 5 m/s. The instrument could be then configured from 5 to 10 m/s.

• To access the configuration via software:
- Set the DIP Switches as shown beside and connect the cable of the LCC-S to the connection of the transmitter.

• please refer to the user manual of the LCC 100 to make the configuration.


The configuration of the parameters can be done either with the DIP Switch or via software (you can not combine both solutions).


To mount the transmitter, mount the ABS plate on the wall (drilling: Ø6 mm, screws and pins are supplied). Insert the transmitter on the fixing plate (see A on the drawing beside). Rotate the housing in clockwise direction until you hear a "click" which confirms that the transmitter is correctly installed.

Positioning of the measuring element in the airflow:

The probe must be placed perpendicular to the airflow, as shown beside. For the duct mount probes, it is possible to place the probe's head front of the airflow, and keep the housing straight:

  • Locate the red point marked on the probe's head.
  • Remove the screw located on the tip of the probe's body. Rotate the probe's head by 2/4 turn, M turn or 34 turn, in order to place the red spot front to the airflow.
  • Replace the screw on the probe's body.


Please avoid any aggressive solvent Please protect the transmitter and its probes from any cleaning product containing formalin that may be used for cleaning rooms or ducts.



100A: Power supply class 2, 230 VAC input, 24 VAC output
100C: Power supply class2, 230 VAC input, 24 VDC output
LCC-S: configuration software with USB cable
Sliding fittings, mounting brackets, wall-mount support for hotwire probes
Only the accessories supplied with the device must be used.


Please always use the device in accordance with its intended use and within parameters described in the technical features in order not to compromise the protection ensured by the device.

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