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Room air quality sensor · BACnet points list
EBTRON IAQ-N300 wall-mount IAQ sensor BACnet points list
Updated 4 November 2026
The IAQ-N300 is an EBTRON wall-mount room sensor for CO2, relative humidity and temperature with an RS-485 port that runs BACnet MS/TP (or Modbus RTU when set by DIP switch). Its BACnet objects are a few Analog Inputs for the measurements plus Analog and Binary Values for elevation, sampling, baud rate and calibration.
This page lists 18 BACnet objects for the EBTRON IAQ-N300 wall-mount IAQ sensor — 15 of them writable — with each object’s type, instance number, name, engineering units and access. It is re-typed from EBTRON’s own free documentation, linked below.
- Manufacturer
- EBTRON
- Model
- IAQ-N300 wall-mount IAQ sensor
- Equipment
- Room air quality sensor
- Equipment type
- Thermostats, sensors & meters
- BACnet objects
- 18 (15 writable)
- Transport
- BACnet MS/TP
- Firmware
- Not stated
- Default device instance
- 2
- Also known as
- IAQ-N300, IAQN300, IAQ-N300-W, IAQ-Ny00-W
Reference only, provided as-is: verify against EBTRON’s current documentation and the live device before use. Not official EBTRON information. Terms of use.
BMS integration notes: EBTRON IAQ-N300 wall-mount IAQ sensor
Set the MS/TP MAC address and baud rate on DIP switch SW1 before power-up, then read the measurement AIs. The AVs and BVs are only for calibration and setup.
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 | CO2 PPM | Space CO2, ppm | Read |
| AI 2 | RH | Space relative humidity, % | Read |
| AI 3 | Temperature | Space temperature (°F unless set to °C) | Read |
Network setup
- MAC address defaults to 2; set 0-127 on SW1 switches 1-7 with power off.
- Device instance defaults to 2; DIP switch 8 on at power-up copies the MAC address into the instance, or write the Device Object_Identifier.
- MS/TP baud defaults to 76,800; 38,400, 19,200 or 9,600 can be set on SW1 switches 1-4 or through the Baud Rate AV.
Watch out for
- Send a BACnet time sync after any power loss; the 24-hour lowest-CO2 value depends on the sensor clock.
- CO2 calibration should only be done between 400 and 2,000 ppm.
- Writing gain/offset values changes the reading; the factory Gain/Offset Status BVs switch back to factory calibration.
EBTRON IAQ-N300 wall-mount IAQ sensor 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 | CO2 PPM | Present CO2 concentration | ppm | Read | |
| AImin | 2 | RH | Present relative humidity | % | Read | |
| AImin | 3 | Temperature | Present room temperature (°F, can be set to °C) | °F | Read | |
| AI | 4 | Lowest PPM | Lowest CO2 in the past 24 h; any write resets it | ppm | Write | |
| AV | 1 | Elevation | Installed elevation above sea level (default 0) | ft | Write | |
| AV | 2 | CO2 Sample Rate | CO2 sampling interval, 1-600 s (default 10) | s | Write | |
| AV | 3 | Baud Rate | MS/TP baud rate (default 76800) | Write | ||
| AV | 4 | Single Point PPM | Single-point CO2 calibration value; -1/-2/-3 report the result | ppm | Write | |
| AV | 5 | ABC Logic Status | ABC automatic background calibration, 1 = on, 0 = off | Write | ||
| AV | 6 | CO2 Gain | Gain applied to the raw CO2 reading (default 1) | Write | ||
| AV | 7 | Relative Humidity Gain | Gain applied to the raw humidity reading (default 1) | Write | ||
| AV | 8 | Temperature Gain | Gain applied to the raw temperature reading (default 1) | Write | ||
| AV | 9 | CO2 Offset | Offset applied to the raw CO2 reading (default 0) | Write | ||
| AV | 10 | Relative Humidity Offset | Offset applied to the raw humidity reading (default 0) | Write | ||
| AV | 11 | Temperature Offset | Offset applied to the raw temperature reading (default 0) | Write | ||
| BV | 1 | Factory CO2 Gain/Offset Status | Active = use the factory CO2 gain/offset calibration | Write | 0=Inactive; 1=Active | |
| BV | 2 | Factory Relative Humidity Gain/Offset Status | Active = use the factory humidity gain/offset calibration | Write | 0=Inactive; 1=Active | |
| BV | 3 | Factory Temperature Gain/Offset Status | Active = use the factory temperature gain/offset calibration | Write | 0=Inactive; 1=Active |
No points match these filters.
Object ID lookup: EBTRON IAQ-N300 wall-mount IAQ sensor point IDs by name
AI1CO2 PPMAI2RHAI3TemperatureAI4Lowest PPMAV1ElevationAV2CO2 Sample RateAV3Baud RateAV4Single Point PPMAV5ABC Logic StatusAV6CO2 GainAV7Relative Humidity GainAV8Temperature GainAV9CO2 OffsetAV10Relative Humidity OffsetAV11Temperature OffsetBV1Factory CO2 Gain/Offset StatusBV2Factory Relative Humidity Gain/Offset StatusBV3Factory Temperature Gain/Offset Status
Integration notes
- Points from Tables A2, A3-3 and A4 of the guide, which covers the IAQ-N100, IAQ-N200 and IAQ-N300 together.
- The AV and BV objects are calibration and setup values, not control points.
- Units are not printed per object; they are taken from the range and description columns.
- The 24-hour lowest-CO2 value relies on the sensor clock; send a BACnet TimeSynchronization after every power loss.
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 IAQ-N300 wall-mount IAQ sensor 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 EBTRON IAQ-N300 wall-mount IAQ sensor
How many BACnet points does the EBTRON IAQ-N300 wall-mount IAQ sensor have?
This list has 18 BACnet objects: 4 analog inputs, 11 analog values, 3 binary values. The exact set on a given unit depends on its firmware, installed options and configuration.
Which EBTRON IAQ-N300 wall-mount IAQ sensor BACnet points are writable?
15 of the 18 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 EBTRON IAQ-N300 wall-mount IAQ sensor BACnet documentation?
The source is IAQ-Ny00-W Quick Installation Guide - Wall Mount Indoor Air Quality Sensors with RS-485 Network Output (Appendix A) (IG_IAQ-Ny00-W_R1B), revision 2016-05-12, published free by EBTRON at https://ebtron.com/wp-content/uploads/documents/IG_IAQ-Ny00-W.pdf.
What are the minimum BACnet points to integrate the EBTRON IAQ-N300 wall-mount IAQ sensor?
Start with AI 1 CO2 PPM (Space CO2, ppm); AI 2 RH (Space relative humidity, %); AI 3 Temperature (Space temperature (°F unless set to °C)).
How do I check these points on the real IAQ-N300 wall-mount IAQ sensor?
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 EBTRON BACnet points lists
- Thermal dispersion airflow measuring station
EBTRON Advantage IV Airflow Transmitter (GTx116e / GTx108e)
EBTRON Advantage IV airflow/temperature transmitters (GTx116e, GTx108e) and EB-Flow2 dual-location units.
Also known as: GTC116e, GTM116e, GTB116e, GTC108e, GTM108e, GTB108e, EB-Flow2, Advantage IV, Table F-2 - Thermal dispersion airflow measuring station
EBTRON Gold Series GTx116 Airflow Transmitter (GTC116 / GTM116)
EBTRON Gold Series GTx116 transmitters: GTC116 (RS-485) and GTM116 (Ethernet) network models.
Also known as: GTC116, GTM116, GTx116, Advantage III, Gold Series, TM_GTx116_R9A1 - Thermal dispersion airflow measuring station
EBTRON HTN104 Thermal Dispersion Airflow / Temperature Transmitter (firmware 1.x)
EBTRON HTN104 thermal dispersion airflow and temperature measurement transmitters with BACnet MS/TP (firmware 1.x).
Also known as: HTN104, HTN104-1.x, EBTRON HTN104 - Room air quality sensor
EBTRON IAQ-N100 wall-mount IAQ sensor
EBTRON IAQ-N100 wall-mount sensors measuring CO2.
Also known as: IAQ-N100, IAQN100, IAQ-N100-W, IAQ-Ny00-W - Room air quality sensor
EBTRON IAQ-N200 wall-mount IAQ sensor
EBTRON IAQ-N200 wall-mount sensors measuring relative humidity and temperature.
Also known as: IAQ-N200, IAQN200, IAQ-N200-W, IAQ-Ny00-W - Thermal dispersion airflow measuring station
EBTRON Silver Series STN104 Airflow / Temperature Transmitter (RS-485 network version)
EBTRON Silver Series STN104 network transmitters (RS-485: BACnet MS/TP, Modbus RTU or JCI N2) for airflow, differential pressure and temperature.
Also known as: STN104, STx104, Silver Series STx104, TM_STx104
Source: IAQ-Ny00-W Quick Installation Guide - Wall Mount Indoor Air Quality Sensors with RS-485 Network Output (Appendix A) · IG_IAQ-Ny00-W_R1B · rev. 2016-05-12. Object names, instances and units are reproduced as published; descriptions are our own.