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Airflow measuring station (thermal dispersion) · BACnet points list
Air Monitor ELECTRA-flo/SD thermal airflow station (BACnet MS/TP) BACnet points list
Updated 6 November 2026
The ELECTRA-flo/SD measures duct air velocity and temperature with thermistor sensors and sends them over BACnet MS/TP (or Modbus RTU, DIP-selectable). It has four Analog Inputs (velocity, velocity pressure, temperature, volumetric flow) and one writable Analog Value for the duct area. Airflow reads 0 until the duct area is written.
This page lists 5 BACnet objects for the Air Monitor ELECTRA-flo/SD thermal airflow station (BACnet MS/TP) — 1 of them writable — with each object’s type, instance number, name, engineering units and access. It is re-typed from Air Monitor’s own free documentation, linked below.
- Manufacturer
- Air Monitor
- Model
- ELECTRA-flo/SD thermal airflow station (BACnet MS/TP)
- Equipment
- Airflow measuring station (thermal dispersion)
- Equipment type
- Thermostats, sensors & meters
- BACnet objects
- 5 (1 writable)
- Transport
- BACnet MS/TP
- Firmware
- 0.8.3 (device object default)
- Default device instance
- Same as the DIP-switch MAC address
- Also known as
- ELECTRA-flo/SD, ElectraFlo/SD, Electra-flo SD, Air Monitor ELECTRA-flo
Reference only, provided as-is: verify against Air Monitor’s current documentation and the live device before use. Not official Air Monitor information. Terms of use.
BMS integration notes: Air Monitor ELECTRA-flo/SD thermal airflow station (BACnet MS/TP)
Set S1 SW5 down for BACnet, the MAC address and baud on the DIP switches, then write the duct area to AV 0 once. Read volumetric flow, velocity and temperature.
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 |
|---|---|---|---|
| AV 0 | AV-0 | Duct area, ft2 (US) or m2 (SI); write once | Write |
| AI 4 | Volumetric Flow | Airflow, CFM or m3/min | Read |
| AI 1 | Velocity | Average velocity, ft/min or m/min | Read |
| AI 3 | Temperature | Air temperature | Read |
Network setup
- Protocol: S1 bank SW5 down = BACnet.
- MAC address 0-127 on the S2 DIP switches; baud 9600, 19200, 38400 or 76800 by DIP switch; 120 ohm termination by DIP switch.
- Device instance starts equal to the MAC address and can then be written in the device object (0-4,194,303).
- No segmentation; max APDU 206.
Watch out for
- AI 4 reads 0 until AV 0 holds the duct area.
- AV 0 must match the unit system: square feet for US units, square meters for SI.
Air Monitor ELECTRA-flo/SD thermal airflow station (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 | Average air velocity | ft/min or m/min | Read | |
| AI | 2 | Velocity Pressure | Equivalent velocity pressure | inH2O or cmH2O | Read | |
| AImin | 3 | Temperature | Air temperature | °F or °C | Read | |
| AImin | 4 | Volumetric Flow | Airflow = velocity x duct area (AV 0) | CFM or m3/min | Read | |
| AVmin | 0 | AV-0 | Duct Area Scale Factor: duct area used to compute airflow | ft2 or m2 | Write |
No points match these filters.
Object ID lookup: Air Monitor ELECTRA-flo/SD thermal airflow station point IDs by name
Integration notes
- The manual gives the Analog Input object names only as 'Various'; their names here are the descriptions from the object table. AV 0 keeps its printed default name 'AV-0' (Duct Area Scale Factor).
- Volumetric flow (AI 4) is velocity times the duct area written to AV 0: square feet in US units, square meters in SI units.
- AI Present_Value and Out_Of_Service are listed as writable; inputs only accept writes for testing.
- Source: ELECTRA-flo/SD with BACnet MS/TP or Modbus RTU output manual DOC-0005317 Rev. A, section 4.3.
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 ELECTRA-flo/SD thermal airflow station (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 Air Monitor ELECTRA-flo/SD thermal airflow station (BACnet MS/TP)
How many BACnet points does the Air Monitor ELECTRA-flo/SD thermal airflow station (BACnet MS/TP) have?
This list has 5 BACnet objects: 4 analog inputs, 1 analog value. The exact set on a given unit depends on its firmware, installed options and configuration.
Which Air Monitor ELECTRA-flo/SD thermal airflow station (BACnet MS/TP) BACnet points are writable?
1 of the 5 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 Air Monitor ELECTRA-flo/SD thermal airflow station (BACnet MS/TP) BACnet documentation?
The source is ELECTRA-flo/SD with BACnet MS/TP or MODBUS RTU Output (DOC-0005317 Rev. A), published free by Air Monitor at https://www.airmonitor.com/hvac/wp-content/uploads/sites/2/electra-flo-sd-bacnet-modbus-manual.pdf.
What are the minimum BACnet points to integrate the Air Monitor ELECTRA-flo/SD thermal airflow station (BACnet MS/TP)?
Start with AV 0 AV-0 (Duct area, ft2 (US) or m2 (SI); write once); AI 4 Volumetric Flow (Airflow, CFM or m3/min); AI 1 Velocity (Average velocity, ft/min or m/min); AI 3 Temperature (Air temperature).
How do I check these points on the real ELECTRA-flo/SD thermal airflow station (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.
Source: ELECTRA-flo/SD with BACnet MS/TP or MODBUS RTU Output · DOC-0005317 Rev. A. Object names, instances and units are reproduced as published; descriptions are our own.