Easy BACnet- Home
- BACnet points lists
- Telaire
- Ventostat T8000 series CO2 sensor, BACnet MS/TP
CO2 sensor (room / duct) · BACnet points list
Telaire Ventostat T8000 series CO2 sensor, BACnet MS/TP BACnet points list
Updated 12 November 2026Unofficial source
The Ventostat T8000 BACnet series are NDIR CO2 transmitters with BACnet MS/TP on RS485. Four Analog Inputs give CO2, humidity and two temperatures; Analog Values hold offsets, relay setpoint and hysteresis, elevation, single-point calibration, baud and MAC; Binary Values switch temperature units and ABC Logic self-calibration and start a calibration.
This page lists 17 BACnet objects for the Telaire Ventostat T8000 series CO2 sensor, BACnet MS/TP — 12 of them writable — with each object’s type, instance number, name, engineering units and access. It is re-typed from a copy of Telaire’s documentation hosted by Instrumart, not by Telaire itself, so treat it as unofficial.
- Manufacturer
- Telaire
- Model
- Ventostat T8000 series CO2 sensor, BACnet MS/TP
- Equipment
- CO2 sensor (room / duct)
- Equipment type
- Thermostats, sensors & meters
- BACnet objects
- 17 (12 writable)
- Transport
- BACnet MS/TP
- Firmware
- Not stated
- Default device instance
- 568000 + MAC address (568000-568127)
- Also known as
- Ventostat 8000, T8000, T8100, T8200, T8300, T8100-D, T8300-D, Telaire Ventostat BACnet, Amphenol Telaire T8000
- Source document
- Telaire Ventostat 8000 BACnet Series CO2 Sensor - User Instructions · T63348-002 · rev. March 2014 (unofficial copy, hosted by Instrumart)
Reference only, provided as-is: verify against Telaire’s current documentation and the live device before use. Not official Telaire information. Terms of use.
BMS integration notes: Telaire Ventostat T8000 series CO2 sensor, BACnet MS/TP
Set the MAC on the DIP switches (and 9600 or 38400 baud on the last switch), then read AI 1 for CO2 and the humidity/temperature inputs if fitted.
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 | CO2 level, ppm | Read |
| AI 2 | Relative Humidity | Relative humidity (if fitted) | Read |
| AI 3 | Temperature, ChipCap | Temperature (if fitted) | Read |
Network setup
- MAC address from the left seven DIP switches (1-127; 0 is the router); the rightmost switch sets 38400 (on) or 9600 (off) baud.
- 19200 and 76800 baud can be set through AV 7 over BACnet.
- Device instance is 568000 plus the MAC address.
Watch out for
- Turn ABC Logic off (BV 2) in spaces that are never unoccupied, such as greenhouses or 24-hour buildings.
- Set elevation (AV 5) for the site so CO2 readings are pressure-corrected.
Telaire Ventostat T8000 series CO2 sensor, 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.
Note: the source document has no read/write column, so access here is inferred from the object type (inputs read-only, values writable). Confirm on the live controller before writing.
| Description | States | |||||
|---|---|---|---|---|---|---|
| AImin | 1 | CO2 | CO2 concentration | ppm | Read | |
| AImin | 2 | Relative Humidity | Relative humidity (option) | %RH | Read | |
| AImin | 3 | Temperature, ChipCap | Temperature from the RH/temp chip | °F | Read | |
| AI | 4 | Temperature, Thermistor | Temperature from the 10K thermistor | °F | Read | |
| AV | 1 | Temperature Offset | Temperature offset, always °C, -50 to +50, default -0.40 | °C | Write | |
| AV | 2 | RH Offset | RH offset, -100 to +100, default 0.30 | % | Write | |
| AV | 3 | Relay Set Point | CO2 relay threshold, default 1000 (relay option) | ppm | Write | |
| AV | 4 | Relay Hysteresis | CO2 relay hysteresis, default 80 (relay option) | ppm | Write | |
| AV | 5 | Elevation | Site elevation for pressure correction, default 0 | m | Write | |
| AV | 6 | Calibration, Single Point | Single-point CO2 calibration gas value, default 1000 | ppm | Write | |
| AV | 7 | Baud Rate | MS/TP baud rate, 9600-76800 | bps | Write | |
| AV | 8 | MAC Address | MS/TP MAC address, 0-127 (default from DIP switches) | Write | ||
| BI | 1 | Relay State | CO2 relay output state (relay option) | Read | 0=OFF, 1=ON | |
| BV | 1 | Temperature Units | Temperature units | Write | 0=°C, 1=°F | |
| BV | 2 | ABC Logic State | ABC Logic self-calibration on/off | Write | 0=OFF, 1=ON | |
| BV | 3 | ABC Logic Reset | Reset ABC Logic | Write | 0=Normal, 1=Reset | |
| BV | 4 | CO2 Calibration | Start single-point CO2 calibration | Write | 0=Normal, 1=Calibrate |
No points match these filters.
Object ID lookup: Telaire Ventostat T8000 series CO2 sensor, BACnet MS/TP point IDs by name
Integration notes
- The object table has no read/write column; Analog and Binary Values are listed as writable (settings and commands), inputs as read-only.
- Units are as printed in the table; AV 1, AV 5 and AV 7 point to footnotes (offset always °C, elevation always meters, baud in bits per second).
- Humidity, relay and thermistor objects only work if that option was ordered; the relay commands have no effect otherwise.
- Temperature units depend on factory options or BV 1; the temperature offset (AV 1) is always in °C and elevation (AV 5) always in meters.
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 Ventostat T8000 series CO2 sensor, 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 Telaire Ventostat T8000 series CO2 sensor, BACnet MS/TP
How many BACnet points does the Telaire Ventostat T8000 series CO2 sensor, BACnet MS/TP have?
This list has 17 BACnet objects: 4 analog inputs, 8 analog values, 1 binary input, 4 binary values. The exact set on a given unit depends on its firmware, installed options and configuration.
Which Telaire Ventostat T8000 series CO2 sensor, BACnet MS/TP BACnet points are writable?
12 of the 17 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. The source has no read/write column, so this is inferred from object type.
Where is the official Telaire Ventostat T8000 series CO2 sensor, BACnet MS/TP BACnet documentation?
Telaire does not publish it on its own website. This list comes from Telaire Ventostat 8000 BACnet Series CO2 Sensor - User Instructions (T63348-002), revision March 2014, a copy hosted by Instrumart at https://core.instrumart.com/assets/Telaire-T8000BACnet-Manual.pdf. Ask Telaire or its representative for the current revision.
What are the minimum BACnet points to integrate the Telaire Ventostat T8000 series CO2 sensor, BACnet MS/TP?
Start with AI 1 CO2 (CO2 level, ppm); AI 2 Relative Humidity (Relative humidity (if fitted)); AI 3 Temperature, ChipCap (Temperature (if fitted)).
How do I check these points on the real Ventostat T8000 series CO2 sensor, 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: Telaire Ventostat 8000 BACnet Series CO2 Sensor - User Instructions · T63348-002 · rev. March 2014. Object names, instances and units are reproduced as published; descriptions are our own.