Easy BACnet- Home
- BACnet points lists
- Dwyer
- Series TUF ultrasonic energy meter, BACnet MS/TP (TUF-B)
Ultrasonic BTU / energy meter · BACnet points list
Dwyer Series TUF ultrasonic energy meter, BACnet MS/TP (TUF-B) BACnet points list
Updated 6 November 2026
The Series TUF is a compact ultrasonic BTU meter (flow sensor plus energy calculator) with a BACnet MS/TP option. Supply and return temperature, flow, power and heat, cool and flow totals are Analog Inputs in fixed metric units; Analog Values hold meter mode, billing day, date, time, address and the supply/return installation setting.
This page lists 18 BACnet objects for the Dwyer Series TUF ultrasonic energy meter, BACnet MS/TP (TUF-B) — 0 of them writable — with each object’s type, instance number, name, engineering units and access. It is re-typed from Dwyer’s own free documentation, linked below.
- Manufacturer
- Dwyer
- Model
- Series TUF ultrasonic energy meter, BACnet MS/TP (TUF-B)
- Equipment
- Ultrasonic BTU / energy meter
- Equipment type
- Thermostats, sensors & meters
- BACnet objects
- 18 (0 writable)
- Transport
- BACnet MS/TP
- Firmware
- Not stated
- Default device instance
- 32001
- Also known as
- TUF, TUF-B, TUF BACnet, Dwyer TUF BTU meter, DwyerOmega TUF
Reference only, provided as-is: verify against Dwyer’s current documentation and the live device before use. Not official Dwyer information. Terms of use.
BMS integration notes: Dwyer Series TUF ultrasonic energy meter, BACnet MS/TP (TUF-B)
Wire the meter on a daisy-chained MS/TP bus at 38,400 baud, give it a unique MAC, then read power, temperatures, flow and the energy totals. Readings refresh about once a minute.
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 3 | Power | Thermal power, kW | Read |
| AI 6 | Total Heat | Heating energy total, kWh | Read |
| AI 7 | Total Cool | Cooling energy total, kWh | Read |
| AI 2 | Flow velocity | Flow rate, m3/h | Read |
| AI 0 | Inlet Water Temperature | Supply water temperature, °C | Read |
| AI 1 | Outlet Water Temperature | Return water temperature, °C | Read |
| AI 4 | TUF Communication Status | Meter comms failure when 1 | Read |
Network setup
- MS/TP at 38,400 baud, 8 data bits, no parity, 1 stop bit.
- Device instance defaults to 32001 and changes with the MS/TP MAC address.
- Max Master and Max Info Frames changes need a power cycle to take effect.
Watch out for
- Meters ship set for supply-line installation; changing to return (AV 21) can only be done over the network.
- Energy and flow totals arrive as whole numbers; decimals only show on the meter display.
- Daisy-chain only; star and T connections are not allowed.
Dwyer Series TUF ultrasonic energy meter, BACnet MS/TP (TUF-B) 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 | Inlet Water Temperature | Supply (forward) water temperature | °C | Read | |
| AImin | 1 | Outlet Water Temperature | Return water temperature | °C | Read | |
| AImin | 2 | Flow velocity | Flow rate | m3/h | Read | |
| AImin | 3 | Power | Thermal power | kW | Read | |
| AImin | 4 | TUF Communication Status | Meter communication status | Read | 0=Success, 1=Failure | |
| AI | 5 | Total Flow | Accumulated flow (whole numbers only) | m3 | Read | |
| AImin | 6 | Total Heat | Accumulated heating energy (whole numbers only) | kWh | Read | |
| AImin | 7 | Total Cool | Accumulated cooling energy (whole numbers only) | kWh | Read | |
| AI | 8 | The Status of Write | Result of the last write | Read | 0=Success, 1=Failure | |
| AI | 9 | The Version of TUF | Meter software version | Read | ||
| AI | 10 | The Version of SSU | Communication module version | Read | ||
| AI | 11 | SSU ID | Communication module ID | Read | ||
| AV | 0 | Meter Mode | Heating or cooling mode (default 1) | Read | 0=Cold mode, 1=Heat mode | |
| AV | 1 | Balance Sheet Date | Monthly billing day, 1-31 (default 31) | Read | ||
| AV | 2 | Local Date | Meter date as YYMMDD (e.g. 151213) | Read | ||
| AV | 3 | Local Time | Meter day and time as WHHMMSS (7 = Sunday) | Read | ||
| AV | 4 | TUF Address | Meter address, 0-127 (default 127) | Read | ||
| AV | 21 | Temperature Compensation Mode | Meter installed on supply or return pipe | Read | 0=Supply, 1=Return, 2-3=Factory use |
No points match these filters.
Object ID lookup: Dwyer Series TUF ultrasonic energy meter, BACnet MS/TP point IDs by name
AI0Inlet Water TemperatureAI1Outlet Water TemperatureAI2Flow velocityAI3PowerAI4TUF Communication StatusAI5Total FlowAI6Total HeatAI7Total CoolAI8The Status of WriteAI9The Version of TUFAI10The Version of SSUAI11SSU IDAV0Meter ModeAV1Balance Sheet DateAV2Local DateAV3Local TimeAV4TUF AddressAV21Temperature Compensation Mode
Integration notes
- Points from the object overview table and Appendices II-IV of the instructions; AV 21 appears only in Appendices III and IV.
- Appendix II names AI 2 "Volume" and Appendix III names AV 3 "Current Time"; the overview table uses "Flow velocity" and "Local Time".
- The appendix shows every Present_Value as Read, but the text says time and the supply/return setting can be changed over the network; AI 8 reports whether a write worked.
- Values update about once a minute, and totals are sent as whole numbers only.
- Units are fixed: °C, m3/h, kW, m3 and kWh.
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 Series TUF ultrasonic energy meter, BACnet MS/TP (TUF-B) 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 Dwyer Series TUF ultrasonic energy meter, BACnet MS/TP (TUF-B)
How many BACnet points does the Dwyer Series TUF ultrasonic energy meter, BACnet MS/TP (TUF-B) have?
This list has 18 BACnet objects: 12 analog inputs, 6 analog values. The exact set on a given unit depends on its firmware, installed options and configuration.
Which Dwyer Series TUF ultrasonic energy meter, BACnet MS/TP (TUF-B) BACnet points are writable?
None of the listed objects are marked writable in the source documentation.
Where is the official Dwyer Series TUF ultrasonic energy meter, BACnet MS/TP (TUF-B) BACnet documentation?
The source is Series TUF Ultrasonic Energy Meter with BACnet Communication - Specifications, Installation and Operating Instructions (Bulletin F-TUF-B (FR# 444246-70 Rev. 2)), revision 1/21, published free by Dwyer at https://assets.omega.com/manuals/TUF_B_Manual.pdf.
What are the minimum BACnet points to integrate the Dwyer Series TUF ultrasonic energy meter, BACnet MS/TP (TUF-B)?
Start with AI 3 Power (Thermal power, kW); AI 6 Total Heat (Heating energy total, kWh); AI 7 Total Cool (Cooling energy total, kWh); AI 2 Flow velocity (Flow rate, m3/h); AI 0 Inlet Water Temperature (Supply water temperature, °C); AI 1 Outlet Water Temperature (Return water temperature, °C); AI 4 TUF Communication Status (Meter comms failure when 1).
How do I check these points on the real Series TUF ultrasonic energy meter, BACnet MS/TP (TUF-B)?
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 Dwyer BACnet points lists
- CO2, humidity and temperature room sensor
Dwyer Series CDTA / CDTC Communicating CO2 Detector
Dwyer Series CDTA (CO2, humidity, temperature) and CDTC (CO2, temperature) wall-mount detectors with setpoint and override, BACnet MS/TP or Modbus RTU.
Also known as: CDTA, CDTC, CDTA-2N000, CDTA-5N000, CDTC-2N000, CDTC-5N000, CDTA-2N000-LCD - Differential pressure and airflow sensor
Dwyer Series MS2 Magnesense II Differential Pressure Transmitter with BACnet (MS2-B)
Dwyer Series MS2 Magnesense II differential pressure transmitters with BACnet MS/TP (ranges up to 25 in. w.c.).
Also known as: MS2-B, MS2, Magnesense II, P-MS2-B - Differential pressure sensor / transmitter
Dwyer Series MSX-Comms Magnesense Pressure Transmitter
Dwyer Series MSX-Comms Magnesense differential pressure transmitters with BACnet MS/TP or Modbus RTU output.
Also known as: MSX, MSX-Comms, Magnesense MSX, DwyerOmega MSX, MSX BACnet - Room pressure monitor
Dwyer Series RSME / RSMC Room Status Monitor
Dwyer Series RSME/RSMC room status monitors (built-in differential pressure plus universal and external BACnet inputs) for isolation rooms, labs and cleanrooms.
Also known as: RSME, RSMC, Series RSME, Series RSMC, DwyerOmega RSME, Dwyer room pressure monitor
Source: Series TUF Ultrasonic Energy Meter with BACnet Communication - Specifications, Installation and Operating Instructions · Bulletin F-TUF-B (FR# 444246-70 Rev. 2) · rev. 1/21. Object names, instances and units are reproduced as published; descriptions are our own.