Dwyer Instruments AVUL-3DM1-LCD | Air velocity transmitter | 3% of reading accuracy | Duct mount | Modbus® communications | with LCD
The Dwyer AVUL-3DM1-LCD is a duct-mount air velocity transmitter designed for high-velocity airflow measurement in HVAC and building automation applications. It provides ±(3% of reading + 0.2 m/s) accuracy across field-selectable ranges of 1000, 2000, 3000 and 4000 FPM (5, 10, 15 and 20 m/s).
With Modbus RTU/ASCII communication, a built-in 5-digit LCD, NEMA 4X (IP66) protection and a conformal-coated sensing element, the transmitter is suited to networked airflow monitoring and control applications.
Part Number: AVUL-3DM1-LCD
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Product Overview
The Dwyer AVUL-3DM1-LCD air velocity transmitter provides a stable velocity signal for duct airflow monitoring and control. Its higher measurement ranges make it suitable for applications such as supply and exhaust ducts, air handling units, VAV systems and fan-tracking installations.
The transmitter measures air velocity across four field-selectable ranges: 1000, 2000, 3000 or 4000 FPM, equivalent to 5, 10, 15 or 20 m/s. Range and units can be configured using the onboard DIP switches.
For building automation and networked HVAC systems, the AVUL-3DM1-LCD communicates using Modbus RTU/ASCII. Devices can be daisy-chained through the three-wire removable terminal connection, while supported baud rates range from 9600 to 115200. The device presents a 1/8 unit load on the network.
A built-in 5-digit LCD provides local readings directly at the transmitter, which can make commissioning, troubleshooting and field verification more convenient. The transmitter can provide velocity and flow data along with additional values such as air temperature through the communication system.
The sensing element features a protective conformal coating intended to support long-term operation with reduced preventive maintenance. The housing is rated NEMA 4X (IP66) and is designed for operating temperatures from 0 to 50°C (32 to 122°F) with 5 to 95% RH non-condensing humidity.
The AVUL-3DM1-LCD operates from 24 VDC ±20% or 24 VAC ±20%, with maximum current consumption of 60 mA. Zero and span can be adjusted using digital push buttons.
For applications where a local display is not required, the Dwyer AVUL-3DM1 provides the same transmitter configuration without the LCD.
Key Benefits
- ±(3% of reading + 0.2 m/s) accuracy for duct airflow measurement
- Field-selectable 1000, 2000, 3000 and 4000 FPM ranges
- Equivalent measurement ranges of 5, 10, 15 and 20 m/s
- Modbus RTU/ASCII communication for networked building automation
- Built-in 5-digit LCD for local readings
- Daisy-chain capable Modbus network connection
- NEMA 4X (IP66) enclosure protection
- Conformal-coated sensing element
- DIP-switch configuration for range and units
- 24 VAC or 24 VDC power supply
- BTL and CE approvals
Who This Product Is Best For
The Dwyer AVUL-3DM1-LCD is suited for:
- HVAC contractors and controls integrators working with VAV and AHU systems
- Facility teams monitoring supply and exhaust duct airflow
- BMS integrators requiring Modbus-connected velocity data
- Consultants specifying networked duct airflow sensors
- Building automation projects requiring local LCD readings
- Applications requiring higher air velocity measurement ranges
How to Install & Use
- Install the probe in the duct with the airflow direction parallel to the sensor tip.
- Connect the transmitter to a 24 VAC or 24 VDC power supply.
- Connect the Modbus network wiring using the removable terminal connection.
- Select the required velocity range and units using the DIP switches.
- Confirm the airflow reading on the built-in LCD and through the connected controller.
- Adjust zero and span using the digital push buttons when required.
- Verify communication and airflow readings before completing commissioning.
Frequently Asked Questions
What accuracy does the Dwyer AVUL-3DM1-LCD provide?
It provides ±(3% of reading + 0.2 m/s) accuracy.
What velocity ranges can the AVUL-3DM1-LCD measure?
The transmitter has field-selectable ranges of 1000, 2000, 3000 and 4000 FPM, equivalent to 5, 10, 15 and 20 m/s.
Does the AVUL-3DM1-LCD have Modbus communication?
Yes. It supports Modbus RTU/ASCII communication, with supported baud rates from 9600 to 115200.
Does the transmitter have a display?
Yes. The AVUL-3DM1-LCD has an integrated 5-digit LCD for local readings.
What power supply does it require?
It operates from 24 VDC ±20% or 24 VAC ±20% and has a maximum current consumption of 60 mA.
What is the enclosure rating?
The transmitter has a NEMA 4X (IP66) enclosure rating.
What is the operating temperature range?
The specified operating temperature range is 0 to 50°C (32 to 122°F).
What is the difference between the AVUL-3DM1-LCD and AVUL-3DM1?
The AVUL-3DM1-LCD includes a built-in 5-digit LCD, while the AVUL-3DM1 is the corresponding transmitter without the display.
Is the AVUL-3DM1-LCD suitable for duct airflow applications?
Yes. It is designed for duct-mounted air velocity measurement and is suitable for HVAC, VAV, AHU, supply-air and exhaust-air monitoring applications.
Is delivery available across Saudi Arabia?
Free Saudi Arabia shipping is available. Contact General Tech Services at +966 569 289 544 to confirm current pricing, stock and lead time.
Request a Quote Today
For pricing, availability or technical assistance for the Dwyer AVUL-3DM1-LCD air velocity transmitter, contact General Tech Services LLC.
Call: +966 569 289 544
Website: www.generaltechshop.sa
