Air Velocity Transducer
The Alnor AVT accommodates permanent or temporary applications.
Each transducer includes 13 velocity ranges so you can customize the
read-out to suit your application  needs. AVTs are useful in research
and development labs and manufacturing processes for flow studies
or quality control.


part # 634-845-500 AVT 55
part # 634-846-500 AVT 65
part # 634-847-500 AVT 75

accuracy AVT 55

AVT 65

AVT 75

 ±2% of reading from 64.4 - 82.4 o F,
±0.5% of full scale of selected range
±2% of reading from 64.4 - 82.4 o F,
±0.5% of full scale of selected range
±3% of reading from 68 - 78.8 o F,
±0.5% of full scale of selected range
repeatability AVT 55
AVT 65
AVT 75		 <±1.0% of reading
<±1.0% of reading
n/a
range AVT 55
AVT 65
AVT 75		 selectable 25 - 10,000 fpm (0.125 - 50.0 m/s)
selectable 25 - 10,000 fpm (0.125 - 50.0 m/s)
selectable 10 - 500 fpm (0.05 - 2.5 m/s)
output
signal		 0 - 5V, 0 - 10V, 1 - 5V, 2 - 10V,
0 - 20 ma, 4 - 20 ma


Alnor Air Velocity Transducers provide the flexibility you need for your air velocity measurement applications. Three different thermo-anemometer sensor configurations are available; each is available in a choice of four probe lengths. The transducers' full-scale range, signal output and time constants are user selectable through simple menu selections within the unit.

Field selection of the full-scale velocity range, time constant and output signal means you can set-up the transducer permanently or temporarily, depending on the application. Select the full-scale velocity range to maximize the output resolution and change it as required. The selectable time constant helps obtain stable readings in turbulent or fluctuating flows.

The transducer output is linear for user convenience. Built-in electronics read the sensor signal and linearize it using calibration data stored in memory. The digital method offers increased accuracy over the instrument's dynamic range. Simply position the sensor in the flow to make the measurement, the transducer does the rest.

You can use current (mA) outputs for transmitting signals remotely or voltage (v) outputs for interfacing to a datalogger.

Each air velocity transducer's calibration is NIST traceable. A certificate of calibration is included with each instrument.



response time to flow AVT 55/ AVT 65 0.2 sec1
AVT 75 5.0 sec2
field selectable velocity ranges AVT 55/ AVT 65
 25 fpm to 200, 250, 300, 400, 500, 750, 1000, 1250, 1500, 2000, 2500, 3000, 4000, 5000, 7500, 10,000 fpm
AVT 75 10 fpm to 100, 125, 150, 200, 250, 300, 400, 500 fpm
minimum resolution 0.07% of selected full scale
input power 11-30 VDC or 18-28 VAC, 350
output impedance VOLTAGE MODE less than 1 ohm, 20 mA
output resistance CURRENT MODE 500 ohms maximum
output time constant (field selectable) 0.05 to 10 seconds
probe length 12" standard; 3", 6", 9" optional
temperature range COMPENSATION RANGE 32-140°F
SENSOR OPERATION 32-200°F
ELECTRONICS OPERATION 32-200°F
STORAGE 32-200°F

1For 63% of final value, tested at 1500 fpm.
2For 63% of final value, tested at 500 fpm.
3Input voltage must be maintained within specifications at the transducer.