Dwyer Instruments AVUL-3DM1-LCD | Air velocity transmitter | 3% of reading accuracy | Duct mount | Modbus® communications | with LCD
A high-velocity duct-mount air velocity transmitter designed for supply and exhaust duct applications, offering 3% of reading accuracy, Modbus RTU/ASCII communication, and a field-selectable range of 1000–4000 FPM (5–20 m/s). The built-in 5-digit LCD provides convenient local readings during installation, commissioning, and maintenance.
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Part Number-AVUL-3DM1-LCD
The Dwyer AVUL-3DM1-LCD is designed for higher-velocity supply and exhaust duct applications requiring accurate air velocity measurement and reliable digital communication with building management systems. It measures air velocity from 1000 to 4000 FPM (5–20 m/s) with 3% of reading accuracy and communicates through Modbus RTU/ASCII.
The transmitter features a NEMA 4X (IP66) enclosure, making it suitable for mechanical rooms, plenums, and other standard HVAC environments. It operates from 32–122°F (0–50°C) and tolerates 5–95% RH non-condensing conditions.
With a response time of approximately 4 seconds, or approximately 1 second at constant temperature, the AVUL-3DM1-LCD is suitable for real-time AHU and fan-control applications. It operates on 24 VDC or 24 VAC with a maximum current requirement of 60 mA, simplifying installation for both retrofit and new HVAC control systems.
A built-in 5-digit LCD allows technicians to verify air velocity readings locally during commissioning and troubleshooting. The compact transmitter mounts into a standard duct probe assembly and carries BTL and CE approvals.
For applications that require the same high-velocity measurement and Modbus communication without a local display, the Dwyer AVUL-3DM1 provides the corresponding non-LCD configuration.
Key Benefits
- 3% of reading accuracy for higher-velocity duct applications
- Modbus RTU/ASCII communication for BMS and building automation integration
- Field-selectable ranges of 1000, 2000, 3000, or 4000 FPM
- Equivalent metric ranges of 5, 10, 15, or 20 m/s
- NEMA 4X (IP66) enclosure for demanding HVAC environments
- Built-in 5-digit LCD for local commissioning and verification
- 24 VDC or 24 VAC power supply
- Suitable for AHU, supply-air, exhaust-air, and fan-control applications
- BTL and CE approved
Who This Product Is Best For
The Dwyer AVUL-3DM1-LCD is suitable for HVAC controls contractors, BMS integrators, building automation professionals, and facility maintenance teams working with higher-velocity duct systems.
It is particularly useful where technicians need accurate air velocity measurement, Modbus RTU/ASCII communication, and a local display for commissioning and troubleshooting.
How to Use
- Mount the AVUL-3DM1-LCD in the duct using standard probe insertion practices.
- Connect 24 VDC or 24 VAC power according to the installation requirements.
- Connect the Modbus RTU/ASCII communication interface to the BMS or compatible controller.
- Select the required velocity range: 1000, 2000, 3000, or 4000 FPM.
- Verify the air velocity reading on the 5-digit LCD during commissioning.
- Confirm that the Modbus data is correctly received by the connected BMS or controller.
Frequently Asked Questions
What accuracy does the AVUL-3DM1-LCD provide?
The transmitter provides 3% of reading accuracy across its field-selectable velocity ranges.
What velocity ranges can the AVUL-3DM1-LCD be set to?
The transmitter can be configured for 1000, 2000, 3000, or 4000 FPM, equivalent to 5, 10, 15, or 20 m/s.
Does the AVUL-3DM1-LCD support Modbus?
Yes. The AVUL-3DM1-LCD communicates over Modbus RTU/ASCII for integration with compatible BMS and building automation systems.
What is the enclosure rating of the AVUL-3DM1-LCD?
The transmitter has a NEMA 4X (IP66) enclosure rating and is suitable for mechanical-room and plenum applications.
Does the AVUL-3DM1-LCD have a local display?
Yes. It includes a 5-digit LCD for on-site measurement verification, commissioning, and troubleshooting.
What power supply does the AVUL-3DM1-LCD require?
The transmitter operates on 24 VDC or 24 VAC with a maximum current requirement of 60 mA.
Is there a non-LCD version available?
Yes. The Dwyer AVUL-3DM1 provides the same high-velocity application range and Modbus RTU/ASCII communication without the onboard LCD.
Does GeneralTech Shop deliver the AVUL-3DM1-LCD across the UAE?
Yes. Contact GeneralTech Shop at +971 6 5436933 to confirm pricing and delivery availability for your emirate.
Should I choose the AVUL-3DM1-LCD or AVUL-3DM1?
The AVUL-3DM1-LCD is suitable when local display readings are required. The AVUL-3DM1 is the display-free alternative for applications where measurements are monitored through the connected BMS or controller.
Request a Quote
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Call: +971 6 5436933
