Dwyer AVUL Air Velocity Transmitter

Fits VAV and HVAC duct air-velocity loops where you need field-selectable 1,000–4,000 FPM ranges, dual analog outputs, and optional BACnet or Modbus.

Key advantages

Field-selectable FPM ranges — 1000/2000/3000/4000 FPM (5–20 m/s); volumetric flow via duct area.
Dual analog outputs — 4–20 mA and 0–5/0–10 VDC together.
Accuracy digit choice — ±(3% rdg + 0.2 m/s) or ±(5% rdg + 0.2 m/s) at standard conditions.
IP66 / NEMA 4X duct mount — 24 VDC or 24 VAC ±20% supply.

Typical applications

VAV box and AHU duct velocity monitoring.
Building automation loops that want both mA and voltage outputs.
Retrofits needing BACnet or Modbus air-velocity points.

Selection guide

Range — 1,000–4,000 FPM (5–20 m/s) air velocity; volumetric flow via duct area setup; field-selectable 1000/2000/3000/4000 FPM.
Accuracy — ±(3% of reading + 0.2 m/s) or ±(5% of reading + 0.2 m/s) @ standard conditions (model accuracy digit 3 or 5).
Output — 4–20 mA and 0–5/0–10 VDC (dual analog).
Supply — 24 VDC ±20% or 24 VAC ±20%.
Process / electrical — Duct-mount probe; 16–26 AWG terminal wiring.
Housing / IP — IP66 / NEMA 4X enclosure.
Temperature limits — 32…122 °F (0…50 °C).
Display / comms — Optional LCD; optional BACnet MS/TP or Modbus RTU/ASCII.

Common mistakes

Ordering the ±5% accuracy digit when the job spec requires ±3% of reading.
Leaving duct area unset when you need volumetric flow instead of velocity.
Specifying BACnet or Modbus without confirming the communication option on the model code.
Ignoring 0…50 °C media/operating limits for hot or outdoor ducts.
Assuming a display is included — LCD is optional.

When to RFQ / what to tell us

Velocity range (1000/2000/3000/4000 FPM) and whether volumetric flow / duct area setup is needed.
Accuracy digit (3 or 5) and output wiring (4–20 mA and/or 0–5/0–10 V).
Supply (24 VDC or 24 VAC) and optional LCD.
Communication (none / BACnet MS/TP / Modbus RTU/ASCII).
Quantity, ship-to country. Compatible with Dwyer AVUL Series duct installs — we do not claim authorized-dealer status.

Request a Quote · Get selection help

Specs

Spec	Value
SKU	45543
Brand	Dwyer Instruments
Model	AVUL Series
Product type	transmitter (air velocity)
Measuring range	1,000–4,000 FPM (5–20 m/s) air velocity; volumetric flow via duct area setup
Accuracy	±(3% of reading + 0.2 m/s) or ±(5% of reading + 0.2 m/s) @ standard conditions (model accuracy digit 3 or 5)
Output signal	4–20 mA and 0–5/0–10 VDC (dual analog)
Supply voltage	24 VDC ±20% or 24 VAC ±20%
Process connection	Duct-mount probe
Electrical connection	16–26 AWG terminal wiring
Wetted materials	Probe materials for HVAC air (see AVUL datasheet)
Housing material	IP66 / NEMA 4X enclosure
IP rating	IP66 / NEMA 4X
Media temperature	Temperature limits 32…122 °F (0…50 °C)
Display	Optional LCD
Communication	Optional BACnet MS/TP or Modbus RTU/ASCII
Approvals	CE
Mounting	Duct mount for VAV/HVAC
Weight	6.0 oz (160 g)
Notes	Specs from Dwyer Series AVUL datasheet AVUL_4.pdf on assets.dwyeromega.com.

Documents

Dwyer AVUL datasheet (PDF)

FAQ

Q: What velocity ranges are selectable? A: Field-selectable 1000/2000/3000/4000 FPM (5–20 m/s). Volumetric flow needs duct area setup.

Q: Which outputs are available? A: Dual analog 4–20 mA and 0–5/0–10 VDC. Optional BACnet MS/TP or Modbus RTU/ASCII on the order code.

Q: Accuracy options? A: Model accuracy digit 3 or 5 → ±(3% of reading + 0.2 m/s) or ±(5% of reading + 0.2 m/s) at standard conditions.

Q: What should I send for a quote? A: Range, accuracy digit, supply, LCD, protocol, quantity. Available for Dwyer AVUL Series replacements — we do not claim authorized-dealer status.