Dwyer Instruments AVLV-1DM1 | Air velocity transmitter | 1% accuracy | Duct mount | Modbus" communication
The Dwyer AVLV-1DM1 is a duct-mount air velocity transmitter providing ±1% accuracy and Modbus RTU/ASCII communication for direct integration with building management systems. With four field-selectable velocity ranges, NEMA 4X (IP66) protection, and BTL and CE approvals, it is designed for VAV, AHU, and centrally monitored HVAC applications where local display functionality is not required.
Part Number: AVLV-1DM1
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Product Overview
The Dwyer AVLV-1DM1 provides accurate duct air velocity measurement and communicates readings directly to a compatible BMS or controller using Modbus RTU/ASCII. Unlike the AVLV-1DM1-LCD, this version has no onboard display, making it suited to installations where airflow measurements are monitored centrally rather than at each transmitter.
The transmitter provides ±1% accuracy across four field-selectable velocity ranges: 100, 200, 300, and 400 FPM, equivalent to 0.5, 1, 1.5, and 2 m/s. These selectable ranges allow the transmitter to be configured for different airflow measurement requirements in VAV and AHU applications.
For Modbus-based building automation systems, the AVLV-1DM1 presents a 1/8 unit load, allowing multiple devices to share a network segment. Communication is connected through a three-wire removable European-style terminal block, while power uses a separate four-wire removable European-style terminal block. Both connections support 16–26 AWG wiring.
The transmitter features a NEMA 4X (IP66) enclosure for protection in demanding HVAC environments, including mechanical rooms and plenum spaces. It operates from 24 VDC ±20% or 24 VAC ±20%, with maximum current consumption of 60 mA.
Typical response time is approximately 4 seconds, or approximately 1 second at constant temperature. The operating temperature range is 0 to 50°C (32 to 122°F) with 5–95% RH non-condensing humidity. The unit weighs approximately 6.0 oz (160 g).
The AVLV-1DM1 also uses a conformal coating on the sensing element for added durability. During installation, the airflow direction should be parallel to the sensor tip.
For applications requiring a local reading at the transmitter, the Dwyer AVLV-1DM1-LCD adds a built-in 5-digit LCD while retaining the Modbus communication concept.
Key Benefits
- ±1% accuracy for duct air velocity measurement
- Modbus RTU/ASCII communication for BMS integration
- No onboard display for centrally monitored installations
- 1/8 unit load for dense Modbus network segments
- Four field-selectable ranges from 100 to 400 FPM
- NEMA 4X (IP66) enclosure protection
- 24 VAC or 24 VDC power supply
- Removable terminal blocks for communication and power connections
- BTL and CE approvals
- Compact 6.0 oz (160 g) construction
- Genuine Dwyer stock with free Saudi Arabia shipping
Call +966 569 289 544 for pricing and availability.
Who This Product Is Best For
The Dwyer AVLV-1DM1 is suited for:
- Controls contractors working on Modbus-based building automation projects
- BMS integrators and HVAC professionals
- Large HVAC projects with multiple airflow measurement points
- VAV box and AHU airflow control applications
- Building automation systems where readings are monitored centrally
- Installations where a local display at every transmitter is unnecessary
- Service and commissioning teams integrating duct airflow data into a central control system
How to Specify & Commission It
- Install the AVLV-1DM1 in the duct using the appropriate probe insertion practice, with airflow parallel to the sensor tip.
- Connect a 24 VAC or 24 VDC power supply.
- Wire the Modbus RTU/ASCII connection to the compatible BMS or controller.
- Select the required velocity range: 100, 200, 300, or 400 FPM.
- Confirm that the air velocity measurement is received correctly by the BMS.
- Verify both measurement and Modbus communication during system commissioning.
Frequently Asked Questions
What accuracy does the Dwyer AVLV-1DM1 provide?
The AVLV-1DM1 provides ±1% accuracy across its field-selectable velocity ranges.
What velocity ranges can the AVLV-1DM1 measure?
It can be configured for 100, 200, 300, or 400 FPM, equivalent to 0.5, 1, 1.5, or 2 m/s.
Does the AVLV-1DM1 support Modbus?
Yes. It communicates using Modbus RTU/ASCII for integration with compatible building management systems and controllers.
Does the AVLV-1DM1 have a local display?
No. The AVLV-1DM1 has no onboard display. Its readings are transmitted through Modbus and can be viewed through the connected BMS or controller.
What is the enclosure rating?
The transmitter has a NEMA 4X (IP66) enclosure rating.
What power supply does it require?
It operates from 24 VDC ±20% or 24 VAC ±20%, with maximum current consumption of 60 mA.
What approvals does the AVLV-1DM1 have?
The transmitter carries BTL and CE approvals.
What is the difference between the AVLV-1DM1 and AVLV-1DM1-LCD?
The AVLV-1DM1 provides Modbus communication without a display, while the AVLV-1DM1-LCD adds a built-in 5-digit LCD for local readings and commissioning.
What is the response time?
Typical response time is approximately 4 seconds, or approximately 1 second at constant temperature.
What is the device load on the Modbus network?
The transmitter presents a 1/8 unit load, supporting installations with multiple devices on a Modbus network segment.
How can I get pricing and delivery information in Saudi Arabia?
Pricing is quote-based. General Tech Services can confirm current availability and delivery details. Call +966 569 289 544.
Request a Quote Today
For pricing, availability, and delivery of the Dwyer AVLV-1DM1 Air Velocity Transmitter, contact General Tech Services.
Call: +966 569 289 544
Shipping: Free Saudi Arabia shipping
