High-performance particle sensing
for monitoring and OEM systems
TERA Sensor develops particulate matter sensing technologies for monitoring systems and OEM integration.
Our sensors are designed to address known limitations of compact optical PM sensing, including humidity effects, particle-size discrimination and long-term operation.
A sensing solution for each monitoring need
Particle monitoring requirements vary significantly depending on the environment, the particles being measured and the way the sensing system will be integrated. TERA Sensor provides dedicated solutions for environmental monitoring, HVAC, industrial processes and controlled environments, with sensing architectures adapted to each use case.
Three sensing platforms for distinct measurement constraints
TERA Sensor develops three complementary OEM sensing platforms, each built around a specific measurement context. NextPM addresses compact PM monitoring where humidity, particle-size discrimination and long-term operation matter. NextPM Advanced adds controlled sampling for ducts and higher concentrations. Sensor SafyrOPC provides calibrated particle counting for cleanroom and contamination-monitoring systems. Across the range, the focus remains the same: documented performance, integration support and control of the measurement conditions that influence the final data.
NextPM is a compact optical particle sensor measuring PM₁, PM₂.₅ and PM₁₀ together with five particle-size bins.
It was developed for monitoring systems and OEM applications where compact integration must be combined with control of humidity effects, particle-size discrimination and long-term contamination.
Used in environmental monitoring, indoor air quality, industrial equipment and scientific measurement systems.
Dual-angle optical detection
Provides additional information for particle-size discrimination.
Active humidity management
Reduces the influence of hygroscopic particle growth before optical measurement.
5 particle-size bins
Provides additional size information from 0.3 to 10 µm.
Long-term operation
Mechanical and airflow design features are intended to reduce contamination and clogging over time.
NextPM Advanced uses the same optical measurement principles as NextPM but replaces the internal fan with an external-pump sampling architecture.
This configuration is intended for applications where the sampling flow must be controlled independently from the surrounding airflow, including HVAC ducts, industrial systems and higher-concentration environments.
Intended for OEM duct probes, custom sampling systems and industrial monitoring equipment.
External pump architecture
Sampling flow controlled independently from ambient or duct airflow.
High concentration range
Up to 10,000 µg/m³.
PM₁ / PM₂.₅ / PM₁₀
Same NextPM optical measurement architecture.
Calibration options
Standard, Verified and individually Adjusted configurations available.
Sensor SafyrOPC is an OEM optical particle counter developed for cleanroom, contamination-monitoring and controlled-environment systems.
Unlike PM mass sensors, it provides particle-count information across defined size channels with a controlled 2.83 L/min sampling flow.
Intended for integration into cleanroom monitoring systems, equipment, tools and multipoint contamination-monitoring architectures.
5 particle-size channels
Defined particle-count information for controlled environments.
2.83 L/min controlled flow
Repeatable sampling conditions.
ISO 21501-4 individual calibration
Each sensor is calibrated individually.
Individual calibration certificate
Unit-specific calibration documentation supplied with each sensor.
Ready-to-use instruments for field and system deployment
In addition to OEM sensing elements, TERA Sensor provides complete instruments for applications requiring standalone operation, simplified deployment or direct integration into monitoring systems.

SafyrOPC
Ready-to-use particle-counting instrument for continuous monitoring in controlled environments.
Discover SafyrOPC
PMSCAN
Portable PM monitor for mobile measurements, field investigations and personal monitoring applications.
Discover PMSCAN
PMDuct
Complete in-duct PM monitoring probe with controlled sampling and industrial communication for HVAC and filtration systems.
Discover PMDuctNeed to design your monitoring system?
Sensor performance is only one part of the final measurement. Sampling, airflow, enclosure, electronics, firmware and calibration strategy can all influence the final data.
TERA Sensor supports system design and integration; TERA Tronics can extend the project through prototyping, industrialization and manufacturing.
Technical data, independent evaluations and calibration
Product performance is documented through technical specifications, calibration options and independent evaluations. These resources are available to support sensor selection, integration and qualification work.
NextPM evaluations
- AQ-SPEC evaluation
- Independent laboratory and field studies
- Peer-reviewed publications
SafyrOPC calibration
- ISO 21501-4 individual calibration
- Individual calibration certificate
- Particle-counting technical data
Contact our team
Product selection, technical questions or integration projects — contact our team directly.
Contact
TERA Sensor sales team
Address
1200 avenue Olivier Perroy, Bât B
13790 Rousset — France
Email sales@groupe-tera.com
Phone +33 6 43 11 36 52
Your local distributor

Tecnosens
Tecnosens S.p.A. — Via Vergnano 16, 25125 Brescia (BS), Italia
(+39) 030 3534144
Xuzhou ZhiDing Environmental Technology Co., Ltd
4th Floor, A3 Building, Xuzhou Safety Science and Technology Industrial Park, Lijiang Road, Tongshan District, Xuzhou City, Jiangsu Province
+8617368442017
Buy online
NextPM can be ordered by the unit from these two distributors — card payment, invoice and worldwide shipping.











