Easy BACnet- Home
- BACnet points lists
- Dwyer
- Series RHPX humidity/temperature communicating transmitter, BACnet MS/TP
Humidity and temperature sensor · BACnet points list
Dwyer Series RHPX humidity/temperature communicating transmitter, BACnet MS/TP BACnet points list
Updated 12 November 2026
The RHPX Comms reports relative humidity and temperature plus calculated dew point, enthalpy and absolute humidity over BACnet MS/TP or Modbus RTU. On BACnet each calculated value is a separate Analog Input per unit system; two Analog Values hold the humidity and temperature offsets and two Multi-State Values set what the display shows.
This page lists 13 BACnet objects for the Dwyer Series RHPX humidity/temperature communicating 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 Dwyer’s own free documentation, linked below.
- Manufacturer
- Dwyer
- Model
- Series RHPX humidity/temperature communicating transmitter, BACnet MS/TP
- Equipment
- Humidity and temperature sensor
- Equipment type
- Thermostats, sensors & meters
- BACnet objects
- 13 (4 writable)
- Transport
- BACnet MS/TP
- Firmware
- Not stated
- Default device instance
- 607000 + DIP switch address (607xxx)
- Also known as
- RHPX, Series RHPX, RHPX Comms, RHPX BACnet, DwyerOmega RHPX, AQ-RHPX-C
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 RHPX humidity/temperature communicating transmitter, BACnet MS/TP
Set the address with the DIP switches, select BACnet MS/TP, and read AI 1 humidity and AI 8 or AI 9 temperature; dew point, enthalpy and absolute humidity are ready-made if the BMS needs them.
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 | Relative Humidity | Relative humidity, %RH | Read |
| AI 9 | Temperature degrees F | Air temperature, °F | Read |
| AI 3 | Dew Point degrees F | Dew point, °F | Read |
Network setup
- Ships set for Modbus RTU at address 127; a DIP switch selects BACnet MS/TP.
- Device instance defaults to 607xxx, where xxx is the address set on the DIP switches.
- MS/TP at 9600 to 115200 baud, 8 data bits; Max Master defaults to 127 and Max Info Frames to 1.
- DeviceCommunicationControl and ReinitializeDevice need the password "Dwyer".
Watch out for
- Offsets (AV 1, AV 2) are limited to ±3.5 %RH and ±5 °F.
Dwyer Series RHPX humidity/temperature communicating 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 | 1 | Relative Humidity | Relative humidity | %RH | Read | |
| AI | 2 | Dew Point degrees C | Dew point | °C | Read | |
| AImin | 3 | Dew Point degrees F | Dew point | °F | Read | |
| AI | 4 | Enthalpy kJ/kg | Enthalpy | kJ/kg | Read | |
| AI | 5 | Enthalpy BTU/lb | Enthalpy | BTU/lb | Read | |
| AI | 6 | Absolute Humidity g/m^3 | Absolute humidity | g/m³ | Read | |
| AI | 7 | Absolute Humidity lb/MMCF | Absolute humidity, lb per million cubic feet | lb/MMCF | Read | |
| AI | 8 | Temperature degrees C | Air temperature | °C | Read | |
| AImin | 9 | Temperature degrees F | Air temperature | °F | Read | |
| AV | 1 | Humidity Offset %RH | Humidity offset, ±3.5 %RH | %RH | Write | |
| AV | 2 | Temperature Offset deg F | Temperature offset, ±5 °F | °F | Write | |
| MV | 1 | Temperature Display Unit | Display temperature unit | Write | 1=Degrees Fahrenheit, 2=Degrees Celsius | |
| MV | 2 | Humidity Display Measurement | Value shown on the display | Write | 1=Due Point (degrees F), 2=Due Point (degrees C), 3=Relative Humidity (%RH), 4=Enthalpy (BTU/lb), 5=Absolute Humidity (lb/MMCF), 6=Enthalpy (kJ/kg), 7=Absolute Humidity (g/m^3) |
No points match these filters.
Object ID lookup: Dwyer Series RHPX humidity/temperature communicating transmitter, BACnet MS/TP point IDs by name
AI1Relative HumidityAI2Dew Point degrees CAI3Dew Point degrees FAI4Enthalpy kJ/kgAI5Enthalpy BTU/lbAI6Absolute Humidity g/m^3AI7Absolute Humidity lb/MMCFAI8Temperature degrees CAI9Temperature degrees FAV1Humidity Offset %RHAV2Temperature Offset deg FMV1Temperature Display UnitMV2Humidity Display Measurement
Integration notes
- Each derived value is given twice, in metric and imperial units, as separate objects.
- The guide also lists a Network Port object (NP1, "MS/TP"); it is not repeated here.
- The overview table prints AI 6 as "Absolute Humidity g/m3"; the property table name "Absolute Humidity g/m^3" is used here.
- AI 7 uses a vendor-specific units code (532) for lb per million cubic feet.
- MV 2 state texts are printed with "Due Point" (sic).
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 RHPX humidity/temperature communicating 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 Dwyer Series RHPX humidity/temperature communicating transmitter, BACnet MS/TP
How many BACnet points does the Dwyer Series RHPX humidity/temperature communicating transmitter, BACnet MS/TP have?
This list has 13 BACnet objects: 9 analog inputs, 2 analog values, 2 multi-state values. The exact set on a given unit depends on its firmware, installed options and configuration.
Which Dwyer Series RHPX humidity/temperature communicating transmitter, BACnet MS/TP BACnet points are writable?
4 of the 13 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 Dwyer Series RHPX humidity/temperature communicating transmitter, BACnet MS/TP BACnet documentation?
The source is Series RHPX Humidity/Temperature Communicating Transmitter - User's Guide (Bulletin AQ-RHPX-C (FR# 444742-00 Rev. 1)), revision 3/24, published free by Dwyer at https://assets.dwyeromega.com/manuals-do/AQ_RHPX_C.pdf.
What are the minimum BACnet points to integrate the Dwyer Series RHPX humidity/temperature communicating transmitter, BACnet MS/TP?
Start with AI 1 Relative Humidity (Relative humidity, %RH); AI 9 Temperature degrees F (Air temperature, °F); AI 3 Dew Point degrees F (Dew point, °F).
How do I check these points on the real Series RHPX humidity/temperature communicating 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 Dwyer BACnet points lists
- Airflow velocity sensor
Dwyer Series AVLV low air velocity transmitter, BACnet MS/TP
Dwyer Series AVLV low air velocity transmitters (100-400 FPM ranges) with the BACnet MS/TP option.
Also known as: AVLV, Series AVLV, AVLV BACnet, DwyerOmega AVLV, P-AVLV-B - Duct airflow velocity sensor
Dwyer Series AVPT pencil-style air velocity transmitter, BACnet MS/TP
Dwyer Series AVPT thermal-anemometer duct velocity transmitters ordered with the BACnet MS/TP output.
Also known as: AVPT, Series AVPT, AVPT BACnet, DwyerOmega AVPT, AVPT pencil style air velocity transmitter - 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 sensor / controller
Dwyer Series DHC Digihelic differential pressure controller, BACnet MS/TP
Dwyer Series DHC Digihelic panel-mount differential pressure controllers with two relays, analog outputs and RS-485 set to BACnet MS/TP.
Also known as: DHC, Series DHC, Digihelic, Digihelic DHC, DwyerOmega DHC, DHC-xxx-xxx - CO / NO2 gas sensor
Dwyer Series GSTC carbon monoxide / nitrogen dioxide gas transmitter, BACnet MS/TP
Dwyer Series GSTC carbon monoxide (GSTC-C) and nitrogen dioxide (GSTC-N) gas transmitters with switch-selectable BACnet MS/TP or Modbus RTU.
Also known as: GSTC, GSTC-C, GSTC-N, Series GSTC, DwyerOmega GSTC, CO Detector, NO2 Detector - Insertion electromagnetic BTU / energy meter
Dwyer Series IEFB insertion thermal energy meter, BACnet MS/TP
Dwyer Series IEFB insertion electromagnetic flow meters with inlet/outlet RTDs that calculate thermal energy, on BACnet MS/TP or Modbus RTU.
Also known as: IEFB, Series IEFB, IEFB BTU meter, DwyerOmega IEFB, Series IEF energy meter, F-IEFB - 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 - Ultrasonic BTU / energy meter
Dwyer Series TUF ultrasonic energy meter, BACnet MS/TP (TUF-B)
Dwyer Series TUF ultrasonic heating/cooling energy meters (TUF-150 to TUF-2000) ordered with BACnet MS/TP.
Also known as: TUF, TUF-B, TUF BACnet, Dwyer TUF BTU meter, DwyerOmega TUF
Source: Series RHPX Humidity/Temperature Communicating Transmitter - User's Guide · Bulletin AQ-RHPX-C (FR# 444742-00 Rev. 1) · rev. 3/24. Object names, instances and units are reproduced as published; descriptions are our own.