HVAC air monitoring
In hvac air monitoring, place and specify the measurement point according to airflow, condensation risk, calibration requirements and the required analogue, RS485 or wireless information path.
NOVUS · Environmental & Controlled-Environment Monitoring
RHT-DM
Duct/extended-probe temperature and relative-humidity transmitter for measurement inside air-handling ducts or through wall penetrations.
VariablesTemperature + RH
RoleDuct-mounted temperature and humidity transmitter
CategorySensing, Conditioning & Transmitters / Data Acquisition
ScopeEnvironmental measurement
Engineering position
Duct-mounted temperature and humidity transmitter for environmental measurement
The product measures or communicates environmental temperature and relative humidity for building, laboratory, storage and controlled-environment systems. These products support environmental-condition monitoring; airborne-particle classification, continuous particle counting and HEPA-filter integrity testing require separate contamination-control instrumentation. Duct/extended-probe temperature and relative-humidity transmitter for measurement inside air-handling ducts or through wall penetrations.
Temperature measurementConfirm measurement range, mounting position, response requirements and calibration expectations.
Relative-humidity measurementConfirm RH range, condensation exposure, calibration expectations and installation airflow.
System integrationSelect analogue, RS485, wireless or cloud integration according to the data consumer and network architecture.
Current product position: Current NOVUS information positions RHT-WM and RHT-DM as temperature/RH transmitters for wall and duct/extended-probe installation, with configuration through SigNow.
System role
RHT-DM signal and system architecture
The architecture separates the field/process interface, the NOVUS function and the downstream control or information path. Exact electrical interfaces, protocol roles and accessories remain model-dependent.
01Duct air stream
02RHT-DM probe
034–20 mA transmission
04BMS / logger / PLC
05HVAC monitoring / control
Use the current NOVUS product page, manual and exact order code as the final authority for numeric ratings, approvals, firmware-dependent functions and supplied accessories.
Application scope
RHT-DM application environments
These application classes indicate the engineering context. Final selection still depends on the exact range, I/O, communication, installation and performance requirements.
Controlled storage
In controlled storage, place and specify the measurement point according to airflow, condensation risk, calibration requirements and the required analogue, RS485 or wireless information path.
Laboratories and cleanroom environmental monitoring
In laboratories and cleanroom environmental monitoring, place and specify the measurement point according to airflow, condensation risk, calibration requirements and the required analogue, RS485 or wireless information path.
Technical data
Technical data and model boundaries
The table is a selection summary, not a substitute for the current NOVUS manual or ordering information. Product families and optional versions can differ in input, output, communication, supply and approvals.
| Mounting | Duct or wall pass-through |
|---|---|
| Temperature range | −40 to 120 °C |
| Probe lengths | 150 or 250 mm |
| Outputs | Isolated 4–20 mA, 2-wire loop powered |
| Configuration | SigNow through TxConfig-USB |
| Housing | IP65; sensor capsule IP40 |
Selection context
RHT-DM within the NOVUS portfolio
Use role, range, I/O, installation and communication requirements to distinguish nearby products. Similar naming does not imply interchangeable electrical or functional capability.
Current page
RHT-DM
Duct/extended-probe temperature and relative-humidity transmitter for measurement inside air-handling ducts or through wall penetrations.
Mounting: Duct or wall pass-throughWall-mounted temperature and humidity transmitterRHT-WM
Wall-mounted temperature and relative-humidity transmitter for room and controlled-area measurement points.
Mounting: Wall mountRS485 temperature and humidity transmitter with displayRHT-485-LCD
Networked temperature/RH transmitter with local display and RS485 Modbus RTU integration.
Communication: RS485 Modbus RTUSelection basis: application duty, exact interface requirements and current orderable configuration.
Documentation & engineering inputs
Current NOVUS documentation and application data
Use the manufacturer page for the current orderable configuration, then provide the application information below so Primionics can review technical fit, accessories and commercial scope.
Measured variablesTemperature, relative humidity and any required psychrometric values.
Measurement locationWall, duct, room, probe position, airflow and condensation exposure.
Data interface4–20 mA, 0–10 V, RS485, wireless network or cloud/SCADA integration.
Accuracy & calibrationRequired uncertainty, calibration points, traceability and re-calibration interval.
Compliance scopeRecord retention/validation needs; separate particle/HEPA requirements if applicable.
Commercial scopeNumber of points, gateways, accessories, software and commissioning support.