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Greenhouse CO2 sensor · BACnet points list
Greystone Energy Systems GO3 Series horticulture CO2 sensor (BACnet MS/TP) BACnet points list
Updated 6 November 2026
The GO3 is a Greystone CO2 sensor for grow rooms and greenhouses, with native BACnet MS/TP. CO2 and the optional temperature and RH readings are Analog Inputs; altitude, relay setpoint, hysteresis, delay and offsets are Analog Values, and the relay state is a Binary Input. Its device object name defaults to "CDD CO2 001".
This page lists 12 BACnet objects for the Greystone Energy Systems GO3 Series horticulture CO2 sensor (BACnet MS/TP) — 8 of them writable — with each object’s type, instance number, name, engineering units and access. It is re-typed from Greystone Energy Systems’s own free documentation, linked below.
- Manufacturer
- Greystone Energy Systems
- Model
- GO3 Series horticulture CO2 sensor (BACnet MS/TP)
- Equipment
- Greenhouse CO2 sensor
- Equipment type
- Thermostats, sensors & meters
- BACnet objects
- 12 (8 writable)
- Transport
- BACnet MS/TP
- Firmware
- Not stated
- Default device instance
- 381001
- Also known as
- GO3, GO3 BACnet, Greystone GO3 greenhouse CO2
Reference only, provided as-is: verify against Greystone Energy Systems’s current documentation and the live device before use. Not official Greystone Energy Systems information. Terms of use.
BMS integration notes: Greystone Energy Systems GO3 Series horticulture CO2 sensor (BACnet MS/TP)
Set the MS/TP MAC in the menu, set altitude, then read CO2 (AI 1) and the optional temperature and RH. Use the relay status if the relay drives CO2 dosing or venting.
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 | Room CO2, ppm | Read |
| AI 2 | Temperature | Room temperature (option) | Read |
| AI 3 | Relative Humidity | Room RH (option) | Read |
| BI 1 | Relay Status | CO2 relay energized | Read |
Network setup
- Device instance defaults to 381001 (381000 + MAC 1); it stops following the MAC once written over BACnet.
- Max_Master defaults to 127 and is writable (1-127).
Watch out for
- Objects for options that are not fitted report Reliability NO_SENSOR and Event_State FAULT.
Greystone Energy Systems GO3 Series horticulture 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.
| Description | States | |||||
|---|---|---|---|---|---|---|
| AImin | 1 | CO2 | CO2, 0-20,000 ppm | ppm | Read | |
| AImin | 2 | Temperature | Temperature, 0-50 °C (temperature option) | °C / °F | Read | |
| AImin | 3 | Relative Humidity | Relative humidity, 0-100 % (RH option) | %RH | Read | |
| AV | 1 | Altitude | Installed altitude, 0-5000 ft (default 0) | ft | Write | |
| AV | 2 | Relay Setpoint | CO2 relay trip point (default 1000 ppm); max 5000 auto-cal, 15,000 dual-beam | ppm | Write | |
| AV | 3 | Relay Hysteresis | Relay hysteresis (default 50 ppm); max 200 auto-cal, 500 dual-beam | ppm | Write | |
| AV | 4 | Relay On Delay | Relay on delay, 0-255 s (default 15) | s | Write | |
| AV | 5 | Temperature Offset | Temperature offset, ±5 Δ°C or ±10 Δ°F (default 0) | delta °C / °F | Write | |
| AV | 6 | RH Offset | RH offset, ±10 %RH (default 0) | %RH | Write | |
| BV | 1 | Temperature Units | Temperature unit select | Write | 0=°C, 1=°F | |
| BV | 2 | Auto Cal Enable | CO2 auto-calibration (auto-cal sensor only; default 1) | Write | 0=Disable, 1=Enable | |
| BImin | 1 | Relay Status | CO2 relay energized (relay option) | Read | 0=Inactive, 1=Active |
No points match these filters.
Object ID lookup: Greystone Energy Systems GO3 Series horticulture CO2 sensor point IDs by name
Integration notes
- Points from the object table in section 1.1 of the setup guide.
- The relay setpoint and hysteresis limits depend on the CO2 sensor fitted: auto-calibrating (up to 5000 ppm) or dual-beam (up to 15,000 ppm).
- Temperature, RH and relay objects report a fault when those options are not installed; BV 2 only works with the auto-cal sensor.
- Access from the object pages: AV and BV Present_Value are read/write.
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 GO3 Series horticulture 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 Greystone Energy Systems GO3 Series horticulture CO2 sensor (BACnet MS/TP)
How many BACnet points does the Greystone Energy Systems GO3 Series horticulture CO2 sensor (BACnet MS/TP) have?
This list has 12 BACnet objects: 3 analog inputs, 6 analog values, 1 binary input, 2 binary values. The exact set on a given unit depends on its firmware, installed options and configuration.
Which Greystone Energy Systems GO3 Series horticulture CO2 sensor (BACnet MS/TP) BACnet points are writable?
8 of the 12 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 Greystone Energy Systems GO3 Series horticulture CO2 sensor (BACnet MS/TP) BACnet documentation?
The source is GO3 Series Horticulture Sensor - Setup Guide BACnet Communication (SG-GO3-BACnet-01-01), revision 08/18, published free by Greystone Energy Systems at https://downloads.greystoneenergy.com/Website%20Documents/GO3/SG-GO3BACnet-01-01.pdf.
What are the minimum BACnet points to integrate the Greystone Energy Systems GO3 Series horticulture CO2 sensor (BACnet MS/TP)?
Start with AI 1 CO2 (Room CO2, ppm); AI 2 Temperature (Room temperature (option)); AI 3 Relative Humidity (Room RH (option)); BI 1 Relay Status (CO2 relay energized).
How do I check these points on the real GO3 Series horticulture 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.
More Greystone Energy Systems BACnet points lists
- CO2 sensor / transmitter
Greystone Energy Systems CDD3 Series CO2 transmitter (BACnet MS/TP)
Greystone CDD3 series room CO2 transmitters with the BACnet MS/TP output, with optional RH, temperature, relay and setpoint.
Also known as: CDD3, CDD3A1XXXBAC, CDD3 BACnet, Greystone CDD3 CO2 - CO2 / RH / temperature sensor
Greystone Energy Systems CHT Series CO2 / RH / temperature sensor (BACnet MS/TP)
Greystone CHT series combined CO2, humidity and temperature sensors with the BACnet MS/TP output.
Also known as: CHT, CHTDT, CHTXXXBAC, Greystone CHT - Carbon monoxide (CO) gas sensor / transmitter
Greystone Energy Systems CMD Series CO transmitter (BACnet MS/TP)
Greystone CMD series carbon monoxide transmitters (model name CMD5B) with BACnet MS/TP, with optional relays, buzzer and temperature.
Also known as: CMD, CMD5B, CMDXXXBAC, Greystone CMD carbon monoxide - Room temperature / RH / differential pressure monitor
Greystone Energy Systems CR3 Series cleanroom monitor (BACnet MS/TP)
Greystone CR3 series cleanroom and critical-room monitors measuring temperature, humidity and room differential pressure, with BACnet MS/TP.
Also known as: CR3, CR3XXXBAC, CR3C, Greystone CR3 critical room monitor - Room dewpoint / humidity sensor
Greystone Energy Systems DPRC Series room dewpoint transmitter (BACnet MS/TP)
Greystone DPRC series room dewpoint transmitters (PICS model DPRCB) with BACnet MS/TP.
Also known as: DPRC, DPRCB, DPRCXXXBAC, Greystone room dewpoint sensor - Duct / outdoor dewpoint and humidity sensor
Greystone Energy Systems DW Series duct / outside air dewpoint transmitter (BACnet MS/TP)
Greystone DW series duct and outside-air dewpoint transmitters (PICS models DPDDB and DPODB) and HTX2 high-accuracy RH/T transmitters with BACnet MS/TP.
Also known as: DW, DPDDB, DPODB, DWXXXBAC, Greystone duct dewpoint sensor, HTX2, HTX2XXXBAC, Greystone HTX2 high accuracy humidity transmitter - Gas detector / sensor (CO and NO2)
Greystone Energy Systems GDT Series toxic gas detector, CO / NO2 (BACnet MS/TP)
Greystone GDT series toxic gas detectors with CO and/or NO2 sensors, relays, buzzer and strobe, using BACnet MS/TP (typical for parking garages).
Also known as: GDT, GDTXXXBAC, GS, Greystone CO NO2 gas detector, parking garage gas detector - Greenhouse CO2 / RH / temperature sensor
Greystone Energy Systems GH Series horticulture sensor (BACnet MS/TP)
Greystone GH series horticulture (greenhouse / grow room) sensors measuring temperature, humidity and CO2, with BACnet MS/TP.
Also known as: GH, GHXXXBAC, Greystone greenhouse CO2 RH temperature sensor - Humidity / temperature sensor
Greystone Energy Systems HN Series humidity / temperature transmitter (BACnet MS/TP)
Greystone HN series humidity and temperature transmitters with BACnet MS/TP and an optional relay.
Also known as: HN, HNXXXBAC, Greystone HN humidity sensor - Humidity / temperature sensor with condensation monitoring
Greystone Energy Systems HTX1 Series rough duty RH / temperature transmitter (BACnet MS/TP)
Greystone HTX1 series rough-duty RH/temperature transmitters (PICS model DP0011) with optional pipe-temperature condensation probe, digital input and relay, using BACnet MS/TP.
Also known as: HTX1, HTX1XXXBAC, DP0011, NPI-56, Greystone rough duty sensor - Indoor air quality multi-sensor (CO2 / PM / VOC / formaldehyde)
Greystone Energy Systems IAQRM Series multi-sensor (BACnet MS/TP)
Greystone IAQRM series room multi-sensors (PICS model MSN) measuring temperature, RH, CO2, VOC, particulates and formaldehyde, with BACnet MS/TP.
Also known as: IAQRM, MSN, IAQRMXXXBAC, Greystone indoor air quality multi sensor - Room temperature / humidity sensor
Greystone Energy Systems NTRC Series temperature / humidity room sensor (BACnet MS/TP)
Greystone NTRC series network room sensors (temperature, optional RH, setpoint, fan switch, override, relay and digital input) with BACnet MS/TP.
Also known as: NTRC, NTRCXXXBAC, STAT, Greystone NTRC network room sensor - Particulate matter (PM2.5 / PM10) sensor
Greystone Energy Systems PM Series particulate matter transmitter (BACnet MS/TP)
Greystone PM series particulate transmitters for room, duct and outdoor mounting (PMRMC, PMDT, PMOS) with BACnet MS/TP.
Also known as: PM Series, PMRMC, PMDT, PMOS, PMXXXBAC, Greystone particulate sensor - Room differential pressure sensor / monitor
Greystone Energy Systems RPC Series room pressure sensor (BACnet MS/TP)
Greystone RPC series room pressure monitors with local alarm buzzer and BACnet MS/TP.
Also known as: RPC, RPCXXXBAC, Greystone room pressure monitor - Ultra-low differential pressure sensor / transducer
Greystone Energy Systems UP Series ultra-low pressure transducer (BACnet MS/TP)
Greystone UP series ultra-low differential pressure transducers with BACnet MS/TP.
Also known as: UP, UPB, UPXXXBAC, Greystone ultra low differential pressure - VOC air quality sensor
Greystone Energy Systems VOC Series air quality transmitter (BACnet MS/TP)
Greystone VOC series room air quality transmitters (VOC with RH and temperature) with BACnet MS/TP and optional relay.
Also known as: VOC Series, VOCXXXBAC, Greystone VOC sensor, Greystone TVOC transmitter
Source: GO3 Series Horticulture Sensor - Setup Guide BACnet Communication · SG-GO3-BACnet-01-01 · rev. 08/18. Object names, instances and units are reproduced as published; descriptions are our own.