{
 "manufacturer": "Greystone Energy Systems",
 "manufacturer_slug": "greystone",
 "model": "QVRF gas transmitter (BACnet MS/TP)",
 "model_slug": "qvrf-gas-transmitter",
 "aliases": [
  "QVRF",
  "QVRF Gas Transmitter",
  "Greystone QVRF refrigerant detector",
  "86850-003-005"
 ],
 "equipment_type": "Gas detector / sensor",
 "applies_to": "Greystone QVRF gas detection transmitters (electrochemical toxic, catalytic combustible and NDIR CO2 / CH4 / refrigerant sensors) with BACnet MS/TP.",
 "summary": "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.",
 "bacnet_transport": [
  "BACnet MS/TP"
 ],
 "firmware": "Firmware QVRF-SEN-4-10, application V2-01_S4-06",
 "default_device_instance": 4005,
 "access_inferred": false,
 "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)."
 ],
 "source": {
  "title": "QVRF Gas Transmitter BACnet Protocol Implementation Conformance (PIC) Statement",
  "doc_number": "86850-003-005 RA",
  "revision_date": "2026-08-17",
  "url": "https://www.bacnetinternational.net/catalog/manu/greystone%20energy%20systems%20inc./PICS_statement_for_ges.pdf",
  "unofficial": true,
  "host": "BACnet International"
 },
 "integration": {
  "summary": "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": [
   {
    "ref": "AI 0",
    "name": "Gas Concentration",
    "why": "Gas concentration"
   },
   {
    "ref": "BO 0",
    "name": "Relay1 Output",
    "why": "Relay 1 output state"
   },
   {
    "ref": "BO 1",
    "name": "Relay2 Output",
    "why": "Relay 2 output state"
   }
  ],
  "enable": null,
  "heartbeat": null,
  "remote_sensors": null,
  "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."
  ],
  "gotchas": [
   "The device commands the relays at priority 16, so any BMS write at priority 1-15 takes precedence."
  ]
 },
 "points": [
  {
   "type": "AI",
   "instance": 0,
   "name": "Gas Concentration",
   "description": "Gas reading; units follow the sensor (e.g. %LFL)",
   "units": "% (%LFL)",
   "access": "R",
   "states": ""
  },
  {
   "type": "AI",
   "instance": 1,
   "name": "Sensor Temperature",
   "description": "Sensor / MCU temperature",
   "units": "°C",
   "access": "R",
   "states": ""
  },
  {
   "type": "AV",
   "instance": 0,
   "name": "Alarm On Level",
   "description": "Alarm on level",
   "units": "% (%LFL)",
   "access": "W",
   "states": ""
  },
  {
   "type": "AV",
   "instance": 1,
   "name": "Alarm Off Level",
   "description": "Alarm off level",
   "units": "% (%LFL)",
   "access": "W",
   "states": ""
  },
  {
   "type": "BO",
   "instance": 0,
   "name": "Relay1 Output",
   "description": "Relay 1 output (device writes at priority 16)",
   "units": "",
   "access": "C",
   "states": "active / inactive"
  },
  {
   "type": "BO",
   "instance": 1,
   "name": "Relay2 Output",
   "description": "Relay 2 output (device writes at priority 16)",
   "units": "",
   "access": "C",
   "states": "active / inactive"
  }
 ],
 "page": "https://easybacnet.com/bacnet-points-lists/greystone/qvrf-gas-transmitter",
 "note": "Provided as-is. Point availability varies by firmware and options; verify against the live device.",
 "disclaimer": "DISCLAIMER: reference only, provided AS IS with no warranty. May contain errors or be out of date. You must verify every point against the manufacturer's current documentation and the live device before use. easybacnet.com accepts no liability for its use and is not affiliated with the manufacturer. Terms: https://easybacnet.com/terms#content"
}