Easy BACnet- Home
- BACnet points lists
- Greystone Energy Systems
- NT Series duct / outside air RH and temperature sensor (BACnet MS/TP)
Humidity / temperature sensor · BACnet points list
Greystone Energy Systems NT Series duct / outside air RH and temperature sensor (BACnet MS/TP) BACnet points list
Updated 12 November 2026
Duct and outside air RH/temperature sensors with native BACnet MS/TP. Temperature and humidity are two Analog Inputs, each with an offset Analog Value, and one Binary Value switches °C/°F. The MAC address is set with DIP switches.
This page lists 5 BACnet objects for the Greystone Energy Systems NT Series duct / outside air RH and temperature sensor (BACnet MS/TP) — 3 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
- NT Series duct / outside air RH and temperature sensor (BACnet MS/TP)
- Equipment
- Humidity / temperature sensor
- Equipment type
- Thermostats, sensors & meters
- BACnet objects
- 5 (3 writable)
- Transport
- BACnet MS/TP
- Firmware
- Firmware 1.2
- Default device instance
- 381001
- Also known as
- NTDABAC, NTOABAC, NTDA, NTOA, NTDABACXXX, Greystone NT duct RH sensor, Greystone NT outside air RH sensor
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 NT Series duct / outside air RH and temperature sensor (BACnet MS/TP)
Set the MAC with the DIP switches, then read AI 1 and AI 2. Choose units with BV 1 before writing offsets.
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 | Temperature | Measured temperature | Read |
| AI 2 | Relative Humidity | Measured relative humidity | Read |
Network setup
- MAC address is set with 7 DIP switches (0-127).
- Device instance defaults to 381000 + MAC (381001); it stops following the MAC once written over BACnet.
Greystone Energy Systems NT Series duct / outside air RH and temperature 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 | Temperature | Temperature, 0.1° resolution | °C / °F | Read | |
| AImin | 2 | Relative Humidity | Relative humidity, 0.1 % resolution | %RH | Read | |
| AV | 1 | Temperature Offset | Offset, ±5 °C / ±10 °F (default 0) | °C / °F | Write | |
| AV | 2 | RH Offset | Offset, ±10 %RH (default 0) | %RH | Write | |
| BV | 1 | Temperature Units | Temperature units (default °C) | Write | 0=°C, 1=°F |
No points match these filters.
Object ID lookup: Greystone Energy Systems NT Series duct / outside air RH and temperature sensor point IDs by name
Integration notes
- The NTDABAC (duct) and NTOABAC (outside air) guides print the same five objects.
- Temperature offset resolution is 0.5 °C or 1 °F; RH offset resolution is 1 %RH.
- Default device object name is RHT 001.
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 NT Series duct / outside air RH and temperature 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 NT Series duct / outside air RH and temperature sensor (BACnet MS/TP)
How many BACnet points does the Greystone Energy Systems NT Series duct / outside air RH and temperature sensor (BACnet MS/TP) have?
This list has 5 BACnet objects: 2 analog inputs, 2 analog values, 1 binary value. The exact set on a given unit depends on its firmware, installed options and configuration.
Which Greystone Energy Systems NT Series duct / outside air RH and temperature sensor (BACnet MS/TP) BACnet points are writable?
3 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 Greystone Energy Systems NT Series duct / outside air RH and temperature sensor (BACnet MS/TP) BACnet documentation?
The source is Duct RH/Temp Sensor NTDABAC Installation Instructions (IN-GE-NTDABACXXX-01-01), revision 01/16, published free by Greystone Energy Systems at https://downloads.greystoneenergy.com/Install%20Notes/IN-GE-NTDABACXXX.pdf.
What are the minimum BACnet points to integrate the Greystone Energy Systems NT Series duct / outside air RH and temperature sensor (BACnet MS/TP)?
Start with AI 1 Temperature (Measured temperature); AI 2 Relative Humidity (Measured relative humidity).
How do I check these points on the real NT Series duct / outside air RH and temperature 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 - Greenhouse CO2 sensor
Greystone Energy Systems GO3 Series horticulture CO2 sensor (BACnet MS/TP)
Greystone GO3 series horticulture CO2 sensors (0-20,000 ppm) with optional temperature, RH and relay, using BACnet MS/TP.
Also known as: GO3, GO3 BACnet, Greystone GO3 greenhouse CO2 - 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 - Gas detector / sensor
Greystone Energy Systems QVRF gas transmitter (BACnet MS/TP)
Greystone QVRF gas detection transmitters (electrochemical toxic, catalytic combustible and NDIR CO2 / CH4 / refrigerant sensors) with BACnet MS/TP.
Also known as: QVRF, QVRF Gas Transmitter, Greystone QVRF refrigerant detector, 86850-003-005 - 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 - Temperature sensor
Greystone Energy Systems TN Series BACnet temperature sensor (BACnet MS/TP)
Greystone TN series BACnet MS/TP temperature sensors in all mounting styles (all-purpose probe, duct, flexible averaging, room, outside, strap-on and others).
Also known as: TN, TNAP, TNDC, TNDF, TNDR, TNFL, TNGL, TNOS, TNRP, TNSO, TNAPXXXBAC, Greystone network temperature sensor - 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: Duct RH/Temp Sensor NTDABAC Installation Instructions · IN-GE-NTDABACXXX-01-01 · rev. 01/16. Object names, instances and units are reproduced as published; descriptions are our own.