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Airflow velocity sensor · BACnet points list
Dwyer Series AVLV low air velocity transmitter, BACnet MS/TP BACnet points list
Updated 12 November 2026
The AVLV measures low air velocity and air temperature and can report volumetric flow from a programmed flow area. On BACnet MS/TP it gives velocity and temperature as Analog Inputs in imperial and metric units, flow and flow area as Analog Values, and three Binary Values to start zero, span and factory-reset routines. The MS/TP address is set with a DIP switch.
This page lists 11 BACnet objects for the Dwyer Series AVLV low air velocity transmitter, BACnet MS/TP — 4 of them writable — with each object’s type, instance number, name, engineering units and access. It is re-typed from Dwyer’s own free documentation, linked below.
- Manufacturer
- Dwyer
- Model
- Series AVLV low air velocity transmitter, BACnet MS/TP
- Equipment
- Airflow velocity sensor
- Equipment type
- Thermostats, sensors & meters
- BACnet objects
- 11 (4 writable)
- Transport
- BACnet MS/TP
- Firmware
- Not stated
- Default device instance
- 607000 + MS/TP address (607xxx)
- Also known as
- AVLV, Series AVLV, AVLV BACnet, DwyerOmega AVLV, P-AVLV-B
Reference only, provided as-is: verify against Dwyer’s current documentation and the live device before use. Not official Dwyer information. Terms of use.
BMS integration notes: Dwyer Series AVLV low air velocity transmitter, BACnet MS/TP
Set the MS/TP address on DIP switch SW2, power up so auto-baud can detect the bus, then read velocity (AI 1/2), temperature (AI 3/4) and flow (AV 1/2).
Minimum points to map
The short list most integrators start with — enough to run the unit from a BMS. Map more as the job needs.
| Object | Name | Why | Access |
|---|---|---|---|
| AI 1 | Velocity FPM | Air velocity, FPM | Read |
| AV 1 | Flow CFM | Airflow, cfm (uses the flow area) | Read |
| AI 3 | Temperature F | Air temperature, °F | Read |
Network setup
- MS/TP address is set on DIP switch SW2 (binary, valid 0-127); factory address is 127.
- Auto-baud runs after power-up and after an address change; it completes on the first Who-Is or ReadProperty it answers.
- Device instance defaults to 607xxx (xxx = address) until a specific instance is written.
- DeviceCommunicationControl and ReinitializeDevice need the password "Dwyer"; Max Master and Max Info Frames changes need a power cycle.
Watch out for
- Zero (BV 1) only works with no airflow and within ±2% of span of the previous zero.
- Span (BV 2) must follow a zero within 5 minutes or it fails.
- Flow readings are only right once the flow area matches the duct.
Dwyer Series AVLV low air velocity transmitter, BACnet MS/TP BACnet objects
Type: AI, AO, AV, BI, BO, BV, MI/MO/MV (multi-state) · Access: Read read-only, Write writable, Command writable with a priority array.
| Description | States | |||||
|---|---|---|---|---|---|---|
| AImin | 1 | Velocity FPM | Air velocity | ft/min | Read | |
| AI | 2 | Velocity MPS | Air velocity | m/s | Read | |
| AImin | 3 | Temperature F | Air temperature | °F | Read | |
| AI | 4 | Temperature C | Air temperature | °C | Read | |
| AVmin | 1 | Flow CFM | Airflow from velocity and flow area | cfm | Read | |
| AV | 2 | Flow CMH | Airflow from velocity and flow area | m³/h | Read | |
| AV | 3 | Flow Area SqFt | Flow area, default 1 | ft² | Read | |
| AV | 4 | Flow Area SqM | Flow area, default 1 | m² | Write | |
| BV | 1 | Zero | Write active to zero the sensor (no airflow) | Write | 0=Inactive, 1=Active | |
| BV | 2 | Span | Write active to set span at top-of-range velocity | Write | 0=Inactive, 1=Active | |
| BV | 3 | Restore Factory Pressure Values | Write active to restore zero, span and area defaults | Write | 0=Inactive, 1=Active |
No points match these filters.
Object ID lookup: Dwyer Series AVLV low air velocity transmitter, BACnet MS/TP point IDs by name
Integration notes
- Flow and flow area are given twice, in imperial and metric units, as separate objects.
- The property tables mark AV 4 Flow Area SqM Present_Value as Read/Write but AV 3 Flow Area SqFt as Read; kept as printed.
- BV 3 is printed as "Restore Factory Pressure Values"; the text says it restores zero, span and area.
- Zero, span and reset each take up to 10 s; the BV stays active on success and drops to inactive on failure.
Check it against the live device. A points list tells you what the controller can expose; the unit in front of you may differ by firmware or installed options. This list is provided as-is for reference only and may contain mistakes — confirming it before you write, map or commission anything is up to you (terms). Easy BACnet scans a network for BACnet IP devices from an Android phone, reads every object on the Series AVLV low air velocity transmitter, BACnet MS/TP and exports what it actually has to Excel — free. New to BACnet? Start with what a BACnet points list is and what the object types mean.
Questions about the Dwyer Series AVLV low air velocity transmitter, BACnet MS/TP
How many BACnet points does the Dwyer Series AVLV low air velocity transmitter, BACnet MS/TP have?
This list has 11 BACnet objects: 4 analog inputs, 4 analog values, 3 binary values. The exact set on a given unit depends on its firmware, installed options and configuration.
Which Dwyer Series AVLV low air velocity transmitter, BACnet MS/TP BACnet points are writable?
4 of the 11 objects accept a write. Points marked Command have a priority array: a write holds until it is released, so release it back to automatic when you are done.
Where is the official Dwyer Series AVLV low air velocity transmitter, BACnet MS/TP BACnet documentation?
The source is Series AVLV Low Air Velocity Transmitter with BACnet Communication - Specifications, Installation and Operating Instructions (Bulletin P-AVLV-B (FR# 444499-10 Rev. 2)), revision 5/23, published free by Dwyer at https://assets.dwyeromega.com/manuals-do/AVLV_P_AVLV_B.pdf.
What are the minimum BACnet points to integrate the Dwyer Series AVLV low air velocity transmitter, BACnet MS/TP?
Start with AI 1 Velocity FPM (Air velocity, FPM); AV 1 Flow CFM (Airflow, cfm (uses the flow area)); AI 3 Temperature F (Air temperature, °F).
How do I check these points on the real Series AVLV low air velocity transmitter, BACnet MS/TP?
Scan the network with a BACnet IP browser such as Easy BACnet, open the device and compare its object list with this table. Anything missing is usually an option that isn't installed or a point that is disabled in the controller's configuration.
More Dwyer BACnet points lists
- Duct airflow velocity sensor
Dwyer Series AVPT pencil-style air velocity transmitter, BACnet MS/TP
Dwyer Series AVPT thermal-anemometer duct velocity transmitters ordered with the BACnet MS/TP output.
Also known as: AVPT, Series AVPT, AVPT BACnet, DwyerOmega AVPT, AVPT pencil style air velocity transmitter - CO2, humidity and temperature room sensor
Dwyer Series CDTA / CDTC Communicating CO2 Detector
Dwyer Series CDTA (CO2, humidity, temperature) and CDTC (CO2, temperature) wall-mount detectors with setpoint and override, BACnet MS/TP or Modbus RTU.
Also known as: CDTA, CDTC, CDTA-2N000, CDTA-5N000, CDTC-2N000, CDTC-5N000, CDTA-2N000-LCD - Differential pressure sensor / controller
Dwyer Series DHC Digihelic differential pressure controller, BACnet MS/TP
Dwyer Series DHC Digihelic panel-mount differential pressure controllers with two relays, analog outputs and RS-485 set to BACnet MS/TP.
Also known as: DHC, Series DHC, Digihelic, Digihelic DHC, DwyerOmega DHC, DHC-xxx-xxx - CO / NO2 gas sensor
Dwyer Series GSTC carbon monoxide / nitrogen dioxide gas transmitter, BACnet MS/TP
Dwyer Series GSTC carbon monoxide (GSTC-C) and nitrogen dioxide (GSTC-N) gas transmitters with switch-selectable BACnet MS/TP or Modbus RTU.
Also known as: GSTC, GSTC-C, GSTC-N, Series GSTC, DwyerOmega GSTC, CO Detector, NO2 Detector - Insertion electromagnetic BTU / energy meter
Dwyer Series IEFB insertion thermal energy meter, BACnet MS/TP
Dwyer Series IEFB insertion electromagnetic flow meters with inlet/outlet RTDs that calculate thermal energy, on BACnet MS/TP or Modbus RTU.
Also known as: IEFB, Series IEFB, IEFB BTU meter, DwyerOmega IEFB, Series IEF energy meter, F-IEFB - Differential pressure and airflow sensor
Dwyer Series MS2 Magnesense II Differential Pressure Transmitter with BACnet (MS2-B)
Dwyer Series MS2 Magnesense II differential pressure transmitters with BACnet MS/TP (ranges up to 25 in. w.c.).
Also known as: MS2-B, MS2, Magnesense II, P-MS2-B - Differential pressure sensor / transmitter
Dwyer Series MSX-Comms Magnesense Pressure Transmitter
Dwyer Series MSX-Comms Magnesense differential pressure transmitters with BACnet MS/TP or Modbus RTU output.
Also known as: MSX, MSX-Comms, Magnesense MSX, DwyerOmega MSX, MSX BACnet - Humidity and temperature sensor
Dwyer Series RHPX humidity/temperature communicating transmitter, BACnet MS/TP
Dwyer Series RHPX duct, space and outdoor humidity/temperature transmitters with the BACnet MS/TP / Modbus RTU communication option.
Also known as: RHPX, Series RHPX, RHPX Comms, RHPX BACnet, DwyerOmega RHPX, AQ-RHPX-C - Room pressure monitor
Dwyer Series RSME / RSMC Room Status Monitor
Dwyer Series RSME/RSMC room status monitors (built-in differential pressure plus universal and external BACnet inputs) for isolation rooms, labs and cleanrooms.
Also known as: RSME, RSMC, Series RSME, Series RSMC, DwyerOmega RSME, Dwyer room pressure monitor - Ultrasonic BTU / energy meter
Dwyer Series TUF ultrasonic energy meter, BACnet MS/TP (TUF-B)
Dwyer Series TUF ultrasonic heating/cooling energy meters (TUF-150 to TUF-2000) ordered with BACnet MS/TP.
Also known as: TUF, TUF-B, TUF BACnet, Dwyer TUF BTU meter, DwyerOmega TUF
Source: Series AVLV Low Air Velocity Transmitter with BACnet Communication - Specifications, Installation and Operating Instructions · Bulletin P-AVLV-B (FR# 444499-10 Rev. 2) · rev. 5/23. Object names, instances and units are reproduced as published; descriptions are our own.