OPX 1025

The game changer in air quality monitoring

The OPX 1025 Particulate Matter (PM) Mass Monitor is the world’s first PM mass monitor powered by the innovative RealPM algorithm, delivering real-time, climate-adjusted particulate mass data in any environment.

From ambient networks and roadside stations to mining, industrial, or research sites, the OPX 1025 provides accurate, continuous measurement of PM₁, PM₂.₅, PM₄, PM₁₀, PM₁₀–₂.₅, particle number concentration, and particle size histograms — all from a single instrument.

OPX 1025 isn’t just smart — it’s designed for operational efficiency, with minimal maintenance and consumable requirements. Even the optical LED source is backed by a 10-year manufacturer’s warranty (parts only; field serviceable).

Welcome to automated, climate-adjusted PM monitoring: OPX 1025, powered by RealPM.

Features

Advanced Optical Particle Spectrometer

Polychromatic light source with 4,096 raw size bins, combined into 100 bins for mass conversion.

RealPM dynamic mass conversion algorithm

Size/density algorithm designed for high accuracy across varying environmental conditions.

Comprehensive PM Reporting

Simultaneous real-time PM1, PM2.5, PM4, PM10, and coarse fraction (PM10-2.5) plus particle count and size histograms.

Controlled Sampling System

PM10 or TSP inlet, 16.67 LPM flow control, Smart Heater for humidity/temperature conditioning, and sheath flow optics protection.

High Sensitivity

Greater sensitivity than traditional continuous PM mass monitor methods.

User-Friendly Operation

Intuitive touchscreen interface with advanced diagnostics for quick troubleshooting.

Advanced Communications

Remote operation capability with cloud-based data access and integration with meteorological and other sensors.

Precision Calibration

Factory-calibrated against reference units; size accuracy verified with PSL and SigmaDust standards.

Low Maintenance

Minimal consumables required, and sheath-flow over optics reduces cleaning intervals.

Produced by an industry-leading ISO Certified facility.

Time-tested reliability

See our technology in action

Schedule a free demo to get a first-hand look at how our solutions support your business.

Schedule a free demo

Resources

Datasheet

Smarter by design — The OPX 1025 difference

Traditional optical monitors often struggle when faced with changing humidity, temperature, or aerosol composition. The OPX 1025 overcomes these challenges with its RealPM dynamic mass conversion algorithm, which continuously adapts to real-world conditions. This ensures reference-level accuracy without the need for constant recalibration or filter-based sampling.

Its advanced optical particle spectrometer captures high-resolution size data across 4,096 channels, dynamically converted into mass using intelligent environmental corrections. Combined with a rugged enclosure, smart diagnostics, and remote cloud connectivity, the OPX 1025 gives professionals a reliable, low-maintenance solution that’s ready for continuous, real-world deployment.

In short, it’s precision without complexity — a true bridge between regulatory-grade and research-grade air monitoring.

Applications

Ambient air quality monitoring (PM2.5, PM10)
Industrial and emissions monitoring
Construction and mining site dust control
Roadside and traffic pollution studies
Fence-line and community monitoring
Research and environmental studies
Indoor air quality assessments
Mobile or temporary monitoring campaigns

Supplied accessories

Sigmadust
BX-597A Temperature/RH/Pressure Sensor
Operation manual
Calibration certificate
Quick start guide
BX-802 PM10 Inlet

Optional accessories

BX-801 Sample Inlet System with Support Braces
TSP Inlet
AIO 2 Weather Station
BX-925B Weatherproof Enclosure with Heater
BX-925B-AC Weatherproof Enclosure with Heater and Air Conditioner

Smarter insights. Simpler operations. Greater confidence.

With OPX 1025, you gain a new level of clarity and control in particulate monitoring. Designed for real-world complexity, it combines intelligent algorithms with proven optical technology to deliver accurate, climate-adjusted data in real time. Its plug-and-play setup, low-maintenance design, and remote connectivity make operations effortless, while the FRM-like accuracy ensures confidence in every reading — across urban, industrial, or research environments.
Built to perform and built to last, OPX 1025 helps you monitor smarter, maintain less, and trust your results every time.