Cubic PM5100 Laser-Based Airborne Particle Counter Sensor

Overview

The Cubic PM5100 is a high-reliability, compact laser-based airborne particle counter sensor engineered for continuous, real-time monitoring of particulate contamination in critical air environments. It operates on the principle of single-particle optical scattering—where particles suspended in an airflow pass through a focused laser beam, generating scattered light pulses proportional to their size and refractive index. These pulses are detected by a high-sensitivity photodiode and classified into six discrete size channels (0.3, 0.5, 1.0, 5.0, and 10.0 µm), delivering standardized concentration outputs in particles per 28.3 liters (equivalent to 1 cubic foot). Designed specifically for integration into OEM environmental monitoring systems, HVAC controllers, and cleanroom supervisory platforms, the PM5100 delivers metrologically traceable performance aligned with national verification regulation JJF 1190 and consistent with the measurement principles defined in ISO 21501-4 for light-scattering airborne particle counters.

Key Features

• Laser diode source with industrial-grade thermal and mechanical stability, ensuring long-term signal consistency across temperature gradients (0–40°C)
• Simultaneous multi-channel counting for five calibrated size bins: 0.3, 0.5, 1.0, 5.0, and 10.0 µm—with counting efficiency validated per ISO 21501-4 methodology using Lighthouse Solair 3100 as reference instrument
• High-flow sampling at 28.3 L/min (1 CFM), enabling statistically robust data acquisition in low-concentration environments and rapid response in transient contamination events
• Compact form factor (99.2 × 66 × 41.7 mm) optimized for embedded integration in space-constrained enclosures, fan filter units (FFUs), and wall-mounted air quality terminals
• Self-cleaning time ≤5 minutes—achieved via internal purge airflow management—minimizing carryover between sampling cycles and supporting repeated deployment in variable aerosol load conditions
• Low-power operation (DC 5 V ±0.2 V, <250 mA avg.) with TTL-level UART interface (3.3 V logic), facilitating direct connection to microcontroller units (MCUs), PLCs, or IoT gateways without level-shifting circuitry

Sample Compatibility & Compliance

The PM5100 is validated for use with ambient air, compressed air (with appropriate inline filtration and pressure regulation), and recirculated HVAC airstreams. It is not intended for corrosive, explosive, or oil-laden gas streams without pre-conditioning. All performance specifications—including flow accuracy, timing stability, counting repeatability (≤5%), and indication error—are verified against JJF 1190, the Chinese national metrological verification regulation for airborne particle counters. While not certified to ISO 14644-1 or EU GMP Annex 1 out-of-the-box, its optical design, calibration traceability, and documented repeatability support qualification protocols required for Grade A–D cleanroom monitoring when integrated into validated system architectures. The sensor’s output format and timing resolution (1-second update interval) align with common SCADA and BMS logging requirements under GLP/GMP-aligned environmental monitoring systems.

Software & Data Management

The PM5100 communicates exclusively via UART-TTL serial protocol at configurable baud rates (default: 9600 bps), outputting ASCII-formatted packets containing real-time channel counts, status flags (e.g., flow fault, laser warning), and internal diagnostics. No proprietary driver or closed firmware is required; raw data parsing is implemented in standard C/C++, Python, and LabVIEW libraries available from Cubic’s technical documentation portal. For regulated environments, end-users may implement audit-trail-enabled data acquisition layers compliant with FDA 21 CFR Part 11—leveraging timestamped packet headers, CRC-verified transmission, and external database logging. Firmware updates (if released) are delivered via UART bootloader mode, preserving configuration integrity during revision cycles.

Applications

• Real-time particulate monitoring in ISO Class 5–8 cleanrooms (e.g., semiconductor fabrication, aseptic pharmaceutical filling suites, medical device assembly)
• OEM integration into smart HVAC controllers for demand-controlled filtration and energy optimization
• Continuous environmental surveillance in hospital isolation rooms, biosafety cabinets, and laboratory animal facilities
• Portable air quality analyzers for indoor environmental quality (IEQ) assessments and post-construction commissioning
• Embedded sensing in laminar flow hoods, gloveboxes, and isolator systems requiring localized particle feedback for alarm triggering or interlock logic

FAQ

What calibration standards does the PM5100 reference?
The PM5100’s counting efficiency and size discrimination are validated against ISO 21501-4 using polystyrene latex (PSL) spheres and cross-checked with a Lighthouse Solair 3100 reference counter under controlled temperature (25±2°C) and humidity (50±10% RH) conditions.
Can the PM5100 be used in compressed air systems?
Yes—provided inlet air is filtered to remove oil aerosols and moisture (dew point ≤−20°C), and pressure is reduced to atmospheric prior to sampling. Inline regulators and coalescing filters are strongly recommended.
Does the sensor support analog output or only UART?
The PM5100 provides UART-TTL digital output only. Analog voltage or current outputs (e.g., 4–20 mA) require external signal conditioning modules or host MCU-based DAC conversion.
Is firmware upgradable in the field?
Yes—via UART bootloader mode. Cubic releases firmware updates to address edge-case environmental drift or enhance communication robustness; version history and release notes are published in the official technical support repository.
What is the maximum particle concentration the PM5100 can accurately resolve?
The sensor maintains linearity and counting fidelity up to 1,000,000 particles per 28.3 L at 0.3 µm. Beyond this threshold, coincidence error increases; users should apply dilution or reduce sample dwell time per ISO 21501-4 Annex C guidance.