Dwyer Instruments SERIES AVU Catalog Page

Air Velocity Transmitters

2 LED

POTENTIOMETER

5-33/64 [140.00]

29/32

[23.00]

2-1/4

[57.0]

3-11/32

[85.0]

9-29/64 [240.0]

8-55/64 [225.0]

51/64

[2.0]

3/4 [19.0]

Series

AVU

Air Velocity Transmitter

Ideal for Building Automation Systems, ±5% or ±8% Full Scale Accuracy

The Series AVU Air Velocity Transmitter is ideal for a wide range of HVAC
measurement and control applications, particularly in complete building control and energy
management systems. The Series AVU is available with 5% or 8% accuracy at a surprisingly
low cost, with 9 models covering ranges from 0-785 FPM to 0-3150 FPM, with either 4-20
mA or 0-10 VDC output.
The Ser ies AVU Transmitter operates by measuring the heat loss from one of the two
sensing elements in the air stream, then calculating the air velocity. Units are virtually
immune to drift due to the design of the sensing element, which makes the transmitter
accurate over the whole air velocity range.

FEATURES

• 4 to 20 mA or 0 to 10 V output versions

• NEMA 6 (IP67) enclosure rating

• AC or DC powered (loop version DC only)

• 5% or 8% accuracy

APPLICATIONS

• Supply and exhaust fan tracking

• Clean room systems

• Air pollution studies and manufacturing

• Process control systems

OPTION

For NIST traceable calibration certificate, use order code NISTCAL-AV1.

120

DWYER INSTRUMENTS, INC.

SPECIFICATIONS
Service: Clean air and compatible,

non-combustible gases.
Accuracy: AVU: ±5% of full-scale;
AVUB: ±8% of full-scale.

Response Time (90%): 5 sec (typical).
Temperature Limits: 32 to 122°F (0 to

50°C).
Humidity Limit: 0-90% RH, non­condensing.
Power Requirements: -A models 24
VDC +10% -15%; -V models 24 VDC
or 24 VAC +10% - 15%.
Output Signal: -A models 4 to 20 mA
current loop; -V models 0-10 VDC.

Loop Resistance: (-A models) 700 Ω.

Model
AVU-1-A
AVU-2-A
AVU-3-A
AVU-1-V
AVU-2-V
AVU-3-V
AVUB-1-V
AVUB-2-V
AVUB-3-V

Range

0 to 785 fpm (0 to 4 m/s)
0 to 1575 fpm (0 to 8 m/s)
0 to 3150 fpm (0 to 16 m/s)
0 to 785 fpm (0 to 4 m/s)
0 to 1575 fpm (0 to 8 m/s)
0 to 3150 fpm (0 to 16 m/s)
0 to 785 fpm (0 to 4 m/s)
0 to 1575 fpm (0 to 8 m/s)
0 to 3150 fpm (0 to 16 m/s)

Current Consumption: 60 mA +
output current.

Max. Start Up Current: 85 mA; 10 V.
Output Current Limit: (-V models)

>10 mA.
Electrical Connections: Screw
terminal. Cable gland for 4-8 mm wire
(16 gauge wire).
Enclosure Rating: NEMA 6 (IP67)
except sensing point.
Probe Dimensions: 9.45 x .75˝ (240 x
19 mm).
Mounting Orientation: Unit not
position sensitive. Probe must be
aligned with airflow.

Weight: 8.8 oz (250 g).
Agency Approvals: CE.

Output

4 to 20 mA
4 to 20 mA
4 to 20 mA
0 to 10 VDC
0 to 10 VDC
0 to 10 VDC
0 to 10 VDC
0 to 10 VDC
0 to 10 VDC

Accuracy

5%
5%
5%
5%
5%
5%
8%
8%
8%