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Gas detector / sensor (toxic gas, dual sensor) · BACnet points list
Senva TG Series toxic gas detector (BACnet MS/TP) BACnet points list
Updated 6 November 2026
The TG is a Senva toxic gas detector with BACnet MS/TP. Each measurement (temperature, gas sensor 1 and 2, supply voltage) has a primary Analog Input plus Smoothed, Minimum, Maximum and Average objects. Analog Values hold the warning and alarm setpoints, hysteresis, sensor life and RS-485 settings; commandable Binary Outputs drive the fan relay, alarm relay and buzzer, and MSV 170 reports the Normal / Warning / Alarm / Extended Alarm state.
This page lists 61 BACnet objects for the Senva TG Series toxic gas detector (BACnet MS/TP) — 50 of them writable — with each object’s type, instance number, name, engineering units and access. It is re-typed from Senva’s own free documentation, linked below.
- Manufacturer
- Senva
- Model
- TG Series toxic gas detector (BACnet MS/TP)
- Equipment
- Gas detector / sensor (toxic gas, dual sensor)
- Equipment type
- Thermostats, sensors & meters
- BACnet objects
- 61 (50 writable)
- Transport
- BACnet MS/TP
- Firmware
- 2.0.0 (PICS 2/7/2020)
- Also known as
- TG, TGX-BXX-XX, Senva TG toxic gas, Senva TG CO NO2 detector
- Source document
- BACnet Protocol Guide TG · 154-0035-0B · rev. 2021-03-12
Reference only, provided as-is: verify against Senva’s current documentation and the live device before use. Not official Senva information. Terms of use.
BMS integration notes: Senva TG Series toxic gas detector (BACnet MS/TP)
Connect to an active MS/TP network and let the TG auto-detect baud, protocol and address, then read the gas readings and MSV 170. The relays and buzzer run automatically from the setpoints; the BMS can override them through the BO priority array.
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 |
|---|---|---|---|
| BO 210 | Fan Relay | Fan relay; BMS can override (commandable) | Command |
| AI 320 | Sensor 1 Gas Concentration | Sensor 1 gas reading | Write |
| AI 330 | Sensor 2 Gas Concentration | Sensor 2 gas reading | Write |
| MV 170 | System State | Normal, Warning, Alarm or Extended Alarm | Read |
| BO 230 | Alarm Relay | Alarm relay state | Command |
| AV 158 | Sensor 1 Sensor Life | Days of sensor 1 life left | Read |
Enable & remote start
The device writes the relays at priority 16 from the system state; commands at priorities 1-5 override immediately, 7-15 respect minimum on/off times. Priority 6 is reserved.
Network setup
- Factory default is automatic baud (9600-115200), protocol and MAC (0-127) detection on an active MS/TP network.
- Writing AV 123 or AV 124 turns off the automatic address or baud selection.
- Device Max_Master and Max_Info_Frames are writable.
Watch out for
- There is no remote way back after changing the baud rate; the device goes silent until the controller matches it.
- AV 190 (key 9699690) wipes the configuration, including the RS-485 settings.
- With BV 114 Auto Baud active, the TG will not start a token on an idle line.
Senva TG Series toxic gas detector (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 | |||||
|---|---|---|---|---|---|---|
| AI | 310 | Temperature | External air temperature (thermistor models); write 0 resets stats | °F / °C | Write | |
| AI | 312 | Smoothed | Temperature, smoothed | °F / °C | Read | |
| AI | 314 | Minimum | Temperature, lowest since reset | °F / °C | Write | |
| AI | 316 | Maximum | Temperature, highest since reset | °F / °C | Write | |
| AI | 318 | Average | Temperature, average since reset | °F / °C | Write | |
| AImin | 320 | Sensor 1 Gas Concentration | Sensor 1 gas concentration | ppm | Write | |
| AI | 322 | Smoothed | Sensor 1 gas, smoothed | ppm | Read | |
| AI | 324 | Minimum | Sensor 1 gas, lowest since reset | ppm | Write | |
| AI | 326 | Maximum | Sensor 1 gas, highest since reset | ppm | Write | |
| AI | 328 | Average | Sensor 1 gas, average since reset | ppm | Write | |
| AImin | 330 | Sensor 2 Gas Concentration | Sensor 2 gas concentration | ppm | Write | |
| AI | 332 | Smoothed | Sensor 2 gas, smoothed | ppm | Read | |
| AI | 334 | Minimum | Sensor 2 gas, lowest since reset | ppm | Write | |
| AI | 336 | Maximum | Sensor 2 gas, highest since reset | ppm | Write | |
| AI | 338 | Average | Sensor 2 gas, average since reset | ppm | Write | |
| AI | 380 | Power Supply Voltage | Internal supply voltage (1-2 V below external) | V | Write | |
| AI | 382 | Smoothed | Supply voltage, smoothed | V | Read | |
| AI | 384 | Minimum | Supply voltage, lowest since reset | V | Write | |
| AI | 386 | Maximum | Supply voltage, highest since reset | V | Write | |
| AI | 388 | Average | Supply voltage, average since reset | V | Write | |
| AV | 103 | Reset Count | Lifetime count of firmware resets | Read | ||
| AV | 104 | Up Time | Time since last reset | s | Read | |
| AV | 123 | MAC Address | MS/TP address, 0-254; writing turns Auto MAC off | Write | ||
| AV | 124 | RS485 Baud Rate | RS-485 baud rate, 1200-460800; writing turns Auto Baud off | Write | ||
| AV | 130 | Temperature Calibration Offset | Temperature calibration offset | Write | ||
| AV | 134 | Smoothed Temperature Response Time | Smoothed temperature response time (default 30) | s | Write | |
| AV | 135 | Gas 1 Response Time | Gas 1 smoothing time (default 10) | s | Write | |
| AV | 136 | Gas 2 Response Time | Gas 2 smoothing time (default 10) | s | Write | |
| AV | 150 | Sensor 1 Warning Setpoint | Sensor 1 gas level for Warning state | ppm | Write | |
| AV | 152 | Sensor 1 Alarm Setpoint | Sensor 1 gas level for Alarm state | ppm | Write | |
| AV | 154 | Sensor 1 Hysteresis | Sensor 1 hysteresis (default 0) | ppm | Write | |
| AV | 156 | Sensor 1 Adjustment | Sensor 1 scale adjustment (default 100 %) | % | Write | |
| AVmin | 158 | Sensor 1 Sensor Life | Sensor 1 remaining life (starts at 1825) | days | Read | |
| AV | 160 | Sensor 2 Warning Setpoint | Sensor 2 gas level for Warning state | ppm | Write | |
| AV | 162 | Sensor 2 Alarm Setpoint | Sensor 2 gas level for Alarm state | ppm | Write | |
| AV | 164 | Sensor 2 Hysteresis | Sensor 2 hysteresis (default 0) | ppm | Write | |
| AV | 166 | Sensor 2 Adjustment | Sensor 2 scale adjustment (default 100 %) | % | Write | |
| AV | 168 | Sensor 2 Sensor Life | Sensor 2 remaining life (starts at 1825) | days | Read | |
| AV | 190 | System Configuration Reset | Write 9699690 to reset configuration to factory (reads 0) | Write | ||
| AV | 192 | Statistics Reset | Write 4765089 to reset all statistics (reads 0) | Write | ||
| AV | 198 | Reserved | Reserved | Read | ||
| AV | 212 | Fan Maximum Off Time | Fan relay maximum off time, 0 = ignored (default 0) | s | Write | |
| AV | 232 | Alarm Maximum Off Time | Alarm relay maximum off time, 0 = ignored (default 0) | s | Write | |
| AV | 252 | Buzzer Delay | Buzzer delay after Alarm state (default 1800) | s | Write | |
| BOmin | 210 | Fan Relay | Fan relay; on automatically at Warning or above | Command | ||
| BOmin | 230 | Alarm Relay | Alarm relay; on automatically at Alarm or above | Command | ||
| BO | 250 | Alarm Buzzer | Alarm buzzer; on at Extended Alarm | Command | ||
| BV | 111 | Identify Device | Identify mode: LEDs on, MAC address blinks | Write | ||
| BV | 112 | Auto Protocol | Automatic protocol detection (default Active) | Write | ||
| BV | 113 | Auto MAC Address | Automatic MAC address selection (default Active) | Write | ||
| BV | 114 | Auto Baud Rate | Automatic baud detection (default Active) | Write | ||
| BV | 115 | Auto Parity | Automatic parity detection (default Active) | Write | ||
| BV | 118 | Buzzer Override | Forces the buzzer off (persists) | Write | ||
| BV | 195 | Auto Reset Statistics | Reading a min/max/average also resets it (default Inactive) | Write | ||
| BV | 196 | Sensor 1 Pulse Status | Sensor 1 electrochemical pulse health check | Write | ||
| BV | 197 | Sensor 2 Pulse Status | Sensor 2 electrochemical pulse health check | Write | ||
| MV | 122 | RS485 Protocol | RS-485 protocol selection (default Auto) | Write | 1=Auto Protocol, 2=BACnet, 3=Modbus RTU, 4=Modbus ASCII, 5=BACnet and Modbus RTU, 6=BACnet and Modbus ASCII, 7=Modbus RTU and ASCII, 8=Any Protocol | |
| MV | 126 | RS485 Parity | RS-485 parity (default Auto) | Write | 1=Auto, 2=No Parity, 3=Odd Parity, 4=Even Parity | |
| MV | 133 | Temperature Units | Temperature units (default °F) | Write | 1=Degrees Fahrenheit, 2=Degrees Celsius | |
| MVmin | 170 | System State | System alarm state | Read | 1=Normal, 2=Warning, 3=Alarm, 4=Extended Alarm | |
| FILE | 25000 | User Configuration | Copy of the device configuration for support | Read |
No points match these filters.
Object ID lookup: Senva TG Series toxic gas detector point IDs by name
AI310TemperatureAI312SmoothedAI314MinimumAI316MaximumAI318AverageAI320Sensor 1 Gas ConcentrationAI322SmoothedAI324MinimumAI326MaximumAI328AverageAI330Sensor 2 Gas ConcentrationAI332SmoothedAI334MinimumAI336MaximumAI338AverageAI380Power Supply VoltageAI382SmoothedAI384MinimumAI386MaximumAI388AverageAV103Reset CountAV104Up TimeAV123MAC AddressAV124RS485 Baud RateAV130Temperature Calibration OffsetAV134Smoothed Temperature Response TimeAV135Gas 1 Response TimeAV136Gas 2 Response TimeAV150Sensor 1 Warning SetpointAV152Sensor 1 Alarm SetpointAV154Sensor 1 HysteresisAV156Sensor 1 AdjustmentAV158Sensor 1 Sensor LifeAV160Sensor 2 Warning SetpointAV162Sensor 2 Alarm SetpointAV164Sensor 2 HysteresisAV166Sensor 2 AdjustmentAV168Sensor 2 Sensor LifeAV190System Configuration ResetAV192Statistics ResetAV198ReservedAV212Fan Maximum Off TimeAV232Alarm Maximum Off TimeAV252Buzzer DelayBO210Fan RelayBO230Alarm RelayBO250Alarm BuzzerBV111Identify DeviceBV112Auto ProtocolBV113Auto MAC AddressBV114Auto Baud RateBV115Auto ParityBV118Buzzer OverrideBV195Auto Reset StatisticsBV196Sensor 1 Pulse StatusBV197Sensor 2 Pulse StatusMV122RS485 ProtocolMV126RS485 ParityMV133Temperature UnitsMV170System StateFILE25000User Configuration
Integration notes
- Points from the object list and object sections of protocol guide 154-0035-0B; it replaces the older TG guide 154-0032-0A.
- The secondary analog inputs are printed only as "Smoothed", "Minimum", "Maximum" and "Average" under each primary AI (primary + 2, 4, 6, 8); names kept as printed.
- Minimum, Maximum and Average reset when 0 is written to them, when AV 192 is written with its key, or on read if BV 195 is active.
- Sensor 2 and thermistor objects exist only on models with those features. Gas units are not printed; ppm is assumed from the setpoint text.
- Multistate objects are MSV in the guide; listed here as MV. FILE 25000 holds a read-only copy of the configuration.
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 TG Series toxic gas detector (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 Senva TG Series toxic gas detector (BACnet MS/TP)
How many BACnet points does the Senva TG Series toxic gas detector (BACnet MS/TP) have?
This list has 61 BACnet objects: 20 analog inputs, 24 analog values, 3 binary outputs, 9 binary values, 1 file, 4 multi-state values. The exact set on a given unit depends on its firmware, installed options and configuration.
Which Senva TG Series toxic gas detector (BACnet MS/TP) BACnet points are writable?
50 of the 61 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 Senva TG Series toxic gas detector (BACnet MS/TP) BACnet documentation?
The source is BACnet Protocol Guide TG (154-0035-0B), revision 2021-03-12, published free by Senva at https://www.senvainc.com/catalog/documents/downloadcenter/TG%20BACnet%20Protocol%20Guide%20154-0035-0B.pdf.
What are the minimum BACnet points to integrate the Senva TG Series toxic gas detector (BACnet MS/TP)?
Start with BO 210 Fan Relay (Fan relay; BMS can override (commandable)); AI 320 Sensor 1 Gas Concentration (Sensor 1 gas reading); AI 330 Sensor 2 Gas Concentration (Sensor 2 gas reading); MV 170 System State (Normal, Warning, Alarm or Extended Alarm); BO 230 Alarm Relay (Alarm relay state); AV 158 Sensor 1 Sensor Life (Days of sensor 1 life left).
How do I enable BMS control of the Senva TG Series toxic gas detector (BACnet MS/TP)?
The device writes the relays at priority 16 from the system state; commands at priorities 1-5 override immediately, 7-15 respect minimum on/off times. Priority 6 is reserved.
How do I check these points on the real TG Series toxic gas detector (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 Senva BACnet points lists
- Room air quality sensor (temperature / RH / CO2)
Senva AQ Series wall air quality sensor (BACnet MS/TP)
Senva AQ Series (AQW) wall-mount sensors measuring temperature, humidity and/or CO2, with optional set point, push button and relay, using BACnet MS/TP.
Also known as: AQ Series, AQW, AQW-XXXXXXX, Senva AQ CO2 sensor, Senva AQ temperature humidity CO2 - Power and energy meter (submeter)
Senva EMX energy meter (BACnet MS/TP and BACnet IP)
Senva EMX, EMX-L (BACnet MS/TP) and EMX-IP (BACnet IP) three-phase energy meters.
Also known as: EMX, EMX-L, EMX-IP, Senva EMX power meter, Senva EMX submeter - Gas detector / sensor (toxic gas, dual sensor)
Senva TGR Series recessed toxic gas sensor (BACnet MS/TP)
Senva TGR series recessed low-voltage toxic gas sensors (TGR-XXX) with one or two gas sensors, using BACnet MS/TP.
Also known as: TGR, TGR-XXX, Senva TGR toxic gas, Senva TGR recessed gas detector - Indoor air quality multi-sensor (CO2 / PM / TVOC / CO / ozone)
Senva TotalSense air quality sensor (BACnet MS/TP)
Senva TotalSense (AQ2W) room air quality sensors with temperature, RH, CO2, TVOC, particulates and optional CO, ozone, light, occupancy, pressure, relay and analog output, using BACnet MS/TP.
Also known as: TotalSense, AQ2W, AQ2W-XXXXXX, Senva TotalSense IAQ, Senva TotalSense CO2 PM TVOC
Source: BACnet Protocol Guide TG · 154-0035-0B · rev. 2021-03-12. Object names, instances and units are reproduced as published; descriptions are our own.