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Greystone Energy Systems QVRF gas transmitter (BACnet MS/TP) BACnet points list
Updated 12 November 2026Unofficial source
The QVRF is a gas transmitter that can run as an MS/TP master or slave. It reports the gas concentration and sensor temperature, has two writable alarm levels and two relay outputs that the device itself drives at priority 16.
This page lists 6 BACnet objects for the Greystone Energy Systems QVRF gas transmitter (BACnet MS/TP) — 4 of them writable — with each object’s type, instance number, name, engineering units and access. It is re-typed from a copy of Greystone Energy Systems’s documentation hosted by BACnet International, not by Greystone Energy Systems itself, so treat it as unofficial.
- Manufacturer
- Greystone Energy Systems
- Model
- QVRF gas transmitter (BACnet MS/TP)
- Equipment
- Gas detector / sensor
- Equipment type
- Thermostats, sensors & meters
- BACnet objects
- 6 (4 writable)
- Transport
- BACnet MS/TP
- Firmware
- Firmware QVRF-SEN-4-10, application V2-01_S4-06
- Default device instance
- 4005
- Also known as
- QVRF, QVRF Gas Transmitter, Greystone QVRF refrigerant detector, 86850-003-005
- Source document
- QVRF Gas Transmitter BACnet Protocol Implementation Conformance (PIC) Statement · 86850-003-005 RA · rev. 2026-08-17 (unofficial copy, hosted by BACnet International)
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 QVRF gas transmitter (BACnet MS/TP)
Read AI 0 for the gas level and the two relay BOs for alarm state; alarm on/off levels are AV 0 and AV 1.
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 0 | Gas Concentration | Gas concentration | Read |
| BO 0 | Relay1 Output | Relay 1 output state | Command |
| BO 1 | Relay2 Output | Relay 2 output state | Command |
Network setup
- Device object ID prints as device 4005.
- MS/TP MAC, max master and baud (9600-76800, default 38400) are in the Network Port object.
Watch out for
- The device commands the relays at priority 16, so any BMS write at priority 1-15 takes precedence.
Greystone Energy Systems QVRF gas transmitter (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 | 0 | Gas Concentration | Gas reading; units follow the sensor (e.g. %LFL) | % (%LFL) | Read | |
| AI | 1 | Sensor Temperature | Sensor / MCU temperature | °C | Read | |
| AV | 0 | Alarm On Level | Alarm on level | % (%LFL) | Write | |
| AV | 1 | Alarm Off Level | Alarm off level | % (%LFL) | Write | |
| BOmin | 0 | Relay1 Output | Relay 1 output (device writes at priority 16) | Command | active / inactive | |
| BOmin | 1 | Relay2 Output | Relay 2 output (device writes at priority 16) | Command | active / inactive |
No points match these filters.
Object ID lookup: Greystone Energy Systems QVRF gas transmitter point IDs by name
Integration notes
- Instances start at 0 (AI 0, AV 0, BO 0).
- The PICS object list calls AI 1 "MCU Temperature" and the AVs "Alarm On / Alarm Off"; names here are from the per-object property tables.
- Units of AI 0 and the alarm levels depend on the sensor; the PICS example shows % (%LFL).
- A Network Port object (MS/TP Port) holds MAC, max master and baud rate (default 38400).
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 QVRF gas transmitter (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 QVRF gas transmitter (BACnet MS/TP)
How many BACnet points does the Greystone Energy Systems QVRF gas transmitter (BACnet MS/TP) have?
This list has 6 BACnet objects: 2 analog inputs, 2 analog values, 2 binary outputs. The exact set on a given unit depends on its firmware, installed options and configuration.
Which Greystone Energy Systems QVRF gas transmitter (BACnet MS/TP) BACnet points are writable?
4 of the 6 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 QVRF gas transmitter (BACnet MS/TP) BACnet documentation?
Greystone Energy Systems does not publish it on its own website. This list comes from QVRF Gas Transmitter BACnet Protocol Implementation Conformance (PIC) Statement (86850-003-005 RA), revision 2026-08-17, a copy hosted by BACnet International at https://www.bacnetinternational.net/catalog/manu/greystone%20energy%20systems%20inc./PICS_statement_for_ges.pdf. Ask Greystone Energy Systems or its representative for the current revision.
What are the minimum BACnet points to integrate the Greystone Energy Systems QVRF gas transmitter (BACnet MS/TP)?
Start with AI 0 Gas Concentration (Gas concentration); BO 0 Relay1 Output (Relay 1 output state); BO 1 Relay2 Output (Relay 2 output state).
How do I check these points on the real QVRF gas transmitter (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 - Humidity / temperature sensor
Greystone Energy Systems NT Series duct / outside air RH and temperature sensor (BACnet MS/TP)
Greystone NTDABAC duct and NTOABAC outside air RH/temperature network sensors with BACnet MS/TP.
Also known as: NTDABAC, NTOABAC, NTDA, NTOA, NTDABACXXX, Greystone NT duct RH sensor, Greystone NT outside air RH 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 - 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: QVRF Gas Transmitter BACnet Protocol Implementation Conformance (PIC) Statement · 86850-003-005 RA · rev. 2026-08-17. Object names, instances and units are reproduced as published; descriptions are our own.