Home / PMDUCT

PMDUCT

In-duct particulate matter monitoring probe for HVAC and filtration systems

PMDUCT

PMDUCT
Discuss your HVAC application
IN-DUCT PM MONITORING

PMDuct is a complete particulate matter monitoring probe designed for direct installation in HVAC, filtration and industrial air-handling systems.

It integrates NextPM Advanced with a controlled sampling architecture so that the airflow through the sensing element can be managed independently from the main duct airflow.

The probe provides PM1, PM2.5 and PM10 measurements together with temperature and relative humidity, with Modbus RS485 RTU communication for integration into industrial monitoring and control systems.

  • Controlled in-duct sampling
  • PM1 / PM2.5 / PM10
  • Up to 10,000 µg/m³
  • Modbus RS485 RTU
Technical documentation User guide, Windows software, 3D STEP files, firmware history…
CONTROLLED SAMPLING

Designed for particulate measurement in duct environments

In HVAC ducts, pressure, air velocity and installation geometry can influence the sampling conditions seen by a particle sensor.

PMDuct uses a dedicated pump-based sampling architecture so that the measurement flow can be controlled separately from the main duct airflow.

Controlled sampling

A dedicated pump generates the measurement flow independently from the main duct airflow.

NextPM Advanced sensing

PM1, PM2.5 and PM10 measurement based on the NextPM Advanced optical architecture.

High concentration range

Measurement range up to 10,000 µg/m³.

Industrial communication

Modbus RS485 RTU for integration into HVAC, BMS, SCADA and industrial control architectures.

APPLICATIONS

PMDuct applications

HVAC & Filtration

HVAC & Filtration

Measure particles in ventilation and duct systems where sampling conditions and system integration must be considered together.

Explore HVAC applications
Cleanroom & Contamination Monitoring

Cleanroom & Contamination Monitoring

Particle counting and monitoring architectures for controlled environments and contamination-sensitive processes.

Explore cleanroom monitoring
Industrial Monitoring

Industrial Monitoring

Monitor particle conditions to investigate process variations, filtration, extraction and production environments.

Explore industrial monitoring

Technical specifications

Main measurement, sampling, communication and environmental specifications.

Designation Values
GENERAL
Measured parameters PM1/PM2.5/PM10 in µg/m3Temperature in °CRelative Humidity in %
PM Concentration Range 0 - 10 000 µg/m3
PM Size Detection range 0.3 µm to 10 µm
PM Repeatability < 3%
Communication RS485 to PLC or Gateway system
Internal Pumping System Optimized to operate even for high air speed rate
Measurement frequency
Normal Mode 1 measure every 15 minutes
Forced Mode Continuous (maintenance time impacted)
Maintenance Every 2 years with Sensor Kit achievable on site(without service interruption)
Power supply 24 V (+/- 10%) - <0.5 A(Other voltages available)
Dimensions and weight H 121 mm x L 116 mm x P 73 mm (+ tubing) | < 1kg
SYSTEM INTEGRATION

Resources for integrating PMDuct

Electrical, communication and installation documentation is available for HVAC and industrial-system integration.

Datasheet↗ Mechanical drawing↗ Installation guide↗ Modbus register map / communication protocol↗ Wiring information↗ BMS / SCADA integration documentation↗ Knowledge Platform↗

View integration resources

Modbus RS485 RTU

Industrial communication for continuous data acquisition.

M12 connectors

Industrial connection format for installation and servicing.

BMS / SCADA integration

PM data can be integrated into existing supervision and control architectures.

PERFORMANCE & CALIBRATION

NextPM Advanced sensing performance and calibration options

PMDuct is based on NextPM Advanced sensing technology. Available documentation includes concentration-range specifications, repeatability data and calibration options derived from the NextPM platform.

Sensing technology

  • NextPM Advanced
  • Dual-angle optical detection
  • Humidity management

Calibration

Standard, Verified and Adjusted configurations exist on the NextPM platform. Contact TERA Sensor to confirm the configuration supplied with your PMDuct order.

Technical data

  • Concentration range
  • Repeatability
  • Sampling architecture
  • Operating conditions
View performance data

Upstream monitoring in critical environments

In cleanrooms and contamination-sensitive production environments, PMDuct can provide particulate information inside the supply-air system before the air reaches the monitored room or process area.

Explore Cleanroom & Contamination Monitoring →
ENGINEERING SUPPORT

Integrating particulate monitoring into an HVAC system?

Probe position, sampling architecture, airflow conditions, enclosure, electrical integration, communication and calibration strategy can all influence in-duct measurement performance.

TERA Sensor can support the sensing and HVAC integration architecture; TERA Tronics can extend the project when custom electronics, firmware, mechanics, gateways or product development are required.

Discuss your HVAC architecture Discover our engineering capabilities
Monitoring need
Sensing & HVAC integration TERA Sensor
Custom electronics & firmware TERA Sensor + TERA Tronics
Product development TERA Tronics

FAQ

NextPM Advanced is an OEM sensing architecture with an external pump, intended for manufacturers designing their own sampling system. PMDuct is a complete in-duct probe built around NextPM Advanced, with its own enclosure, controlled sampling path and Modbus RS485 RTU communication, ready for direct installation.

A dedicated pump generates the measurement flow independently from the main duct airflow, so that duct pressure and air velocity do not directly dictate the sampling conditions seen by the sensing element.

Pressure and air velocity in a duct can influence the flow reaching a directly exposed sensor. PMDuct's pump-based sampling manages this influence rather than eliminating it entirely; installation conditions should still be considered when interpreting the data.

PMDuct measures PM1, PM2.5 and PM10 mass concentrations, together with temperature and relative humidity.

PMDuct covers a concentration range of 0 to 10,000 µg/m³, based on the NextPM Advanced sensing architecture.

Yes. PMDuct communicates over Modbus RS485 RTU, which integrates directly into building management and SCADA systems.

Yes. PMDuct can be installed at different points in a filtration or air-treatment system to compare particle conditions before and after filtration stages, supporting investigation rather than automated pass/fail certification.