Series AVUL Air Velocity Transmitter

3% and 5% Models

The SERIES AVUL Air Velocity Transmitter quickly and accurately measures air velocity or volumetric flow in imperial or metric units. Simultaneous current and voltage outputs on all models provide universal inputs to monitoring equipment while the output range, units, and 0 to 5/10 VDC output can be configured via local DIP switches. The optional integral display, or the portable remote display tool, provide a convenient way to locally monitor process values and configure the unit.

Models are available in 3% and 5% accuracy models to suit a variety of needs, and the optional BACnet MS/TP or Modbus® RTU/ASCII communication protocol allows units to be daisy-chained while providing access to all of the velocity and flow data, as well as additional information such as air temperature.

Dwyer Instruments, Inc. was recognized for excellence in product design in the 14th annual Dealer Design Awards Program sponsored by The Air Conditioning Heating & Refrigeration News magazine (The ACHR News). An independent panel of contractors acted as judges in the contest that had 81 entries. The company’s Series AVUL Air Velocity Transmitter was the Gold Award Winner in the Testing and Monitoring product category. The ACHR News is the leading trade magazine in the heating, ventilating, air conditioning, and refrigeration industries. To read the full announcement please visit http://www.dwyer-inst.com/2017DDAGoldWinner..

Product Applications

  • VAV systems
  • Building ducts

Models & Ordering

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Model Description Usually Ships Price Order
AVUL-3DA1
Ships: Same Day
Price: $225.00
Air velocity transmitter, 3% accuracy, duct mount, universal current/voltage outputs Same Day $225.00 Order
AVUL-3DB1
Ships: Same Day
Price: $300.00
Air velocity transmitter, 3% accuracy, duct mount, BACnet communications Same Day $300.00 Order
AVUL-3DM1
Ships: Same Day
Price: $300.00
Air velocity transmitter, 3% accuracy, duct mount, Modbus® communications Same Day $300.00 Order

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Specifications

Service:
Clean air and non-combustible, compatible gases.
Wetted Materials:
Consult factory.
Range:
1000, 2000, 3000, 4000 FPM (5, 10, 15, 20 m/s); field selectable.
Accuracy:
±(5% of reading + 0.2 m/s) or ±(3% of reading + 0.2 m/s) @ standard conditions, depending on model.
Temperature Limits:
32 to 122°F (0 to 50°C).
Power Requirements:
24 VDC ±20% or 24 VAC ±20%.
Humidity Limits.:
5 to 95% RH, non-condensing.
Output Signals:
4 to 20 mA, 0 to 5 VDC, 0 to 10 VDC.
Response Time (90%):
10 s, typical.
Zero & Span Adjustments:
Digital push buttons.
Output Load Resistance:
Current output: 0 to 1100 Ω max.; Voltage output: Minimum load resistance 1 kΩ.
Current Consumption:
60 mA max.
Display:
5 digit LCD (optional).
Electrical Connections:
Analog; power and output: four wire removable European style terminal block for 16 to 26 AWG.
Communication:
Connections: BACnet MS/TP or Modbus® RTU/ASCII: three wire removable European style terminal block for 16 to 26 AWG; Supported baud rates: 9600, 19200, 38400, 57600, 76800, 115200. (optional)
Device Load:
1/8th unit load.
Electrical Entry:
1/2" NPS thread. Accessory: Cable gland for 5 to 10 mm diameter cable, A-151.
Enclosure Rating:
NEMA 4X (IP66).
Mounting Orientation:
Flow direction must be parallel to the sensor tip.
Weight:
6.0 oz (160 g).
Agency Approval:
BTL, CE.

Features

  • Sensing elements have been coated with an engineered conformal coating to ensure durability and longevity
  • Field selectable ranges can be quickly configured without power to the unit

Accessories

Model Number Description Usually Ships Price Order
A-151 Cable gland for 5 to 10 mm diameter cable. Same Day $2.50 Order
Remote display tool for the MS2 Series. A-435-A Remote display tool for the MS2 Series. Same Day $65.00 Order
100 to 240 VAC/VDC to 24 VDC power supply. SCD-PS 100 to 240 VAC/VDC to 24 VDC power supply. Same Day $30.00 Order
A-AVUL-LCD Field upgradeable display. 1-2 Weeks $35.00 Order
A-AVUL-MTG Replacement duct mount plate assembly. Same Day $5.00 Order

Videos

Model Chart


     AVUL-XXX-OPT    AVUL AIR VELOCITY TRANSMITTER

          1ST SYMBOL (1ST X) ACCURACY
             3     +/- (0.2M/S + 3% OF READING) @ STD CONDITIONS
             5     +/- (0.2M/S + 5% OF READING) @ STD CONDITIONS
            
          2ND SYMBOL (2ND X) MOUNTING
             D     DUCT MOUNT

          3RD SYMBOL (3RD X) OUTPUT
             A1    ANALOG UNIVERSAL (0-5V, 0-10V, 4-20MA)
             B1    ANALOG + BACNET OUTPUT
             M1    ANALOG + MODBUS OUTPUT
           
          OPTIONS (OPT)
            -LCD    LCD DISPLAY           
            -FC     FACTORY CALIBRATION CERTIFICATE
            -NIST   NIST TRACEABLE CERTIFICATE
            -GLD    CABLE GLAND ACCESSORY             
 

Product Literature

Manuals

Catalog Pages

Product Data Sheet

SlideShare

Approvals

Drawings

Questions

Question
Is there a minimum duct size that this sensor can be used in?
Answer
The sensing element is about ¾” from the tip of the stem so the duct size would need to accommodate the entire sensing element. If being used in a smaller duct, you will want to verify that the flow range is within the operating range, 1000, 2000, 3000, or 4000 FPM.
Question
Is there a minimum duct size that this sensor can be used in?
Answer
The sensing element is about ¾” from the tip of the stem so the duct size would need to accommodate the entire sensing element. If being used in a smaller duct, you will want to verify that the flow range is within the operating range, 1000, 2000, 3000, or 4000 FPM.
Question
Can you use a display with the Modbus or BACnet options?
Answer
Yes, either the integral LCD Display, A-AVUL-LCD, or the remote display tool, A-435-A, can be used with Modbus or BACnet configurations.

Photo Downloads

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