MCERTS Certification & Calibration Standards

The Sensorbee Air Pro 2 is officially certified by CSA Group (Certificate No: CSA MC250462/00) and independently tested by Bureau Veritas. MCERTS (the Environment Agency's Monitoring Certification Scheme) is the UK standard for environmental monitoring equipment. It is administered by the Environment Agency and assessed by approved certification bodies including CSA Group and Sira Certification Service. Equipment bearing the MCERTS mark has been independently verified to meet defined performance standards — meaning your monitoring data is legally defensible in planning applications, Section 61 consent conditions, and environmental permit compliance.

• Verified Accuracy: Tested against the reference-grade Fidas 200S system at the London Teddington Bushy Park monitoring station.
• Full Compliance: Certified for both PM10 and PM2.5 monitoring with expanded uncertainty well below the 50% limit required for indicative monitoring.
• Heated Inlet: In high-humidity, fog, or condensation-risk conditions, Sensorbee Pro 2 operates with a heated inlet to improve measurement stability.
• Why MCERTS Matters: Planning authorities and the Environment Agency increasingly require MCERTS-certified monitoring as a condition of consent for construction, demolition, and industrial operations. Non-certified data may be challenged or rejected in regulatory proceedings.

Construction sites often exceed the "ambient" dust levels used in standard testing. In response to the IAQM Position Statement (2025), we provide transparent evidence of our sensor's performance in harsh conditions.

• High-Concentration Linearity: Evidence shows the Pro 2 sensor remains linear up to 1,400 µg/m³, ensuring you capture critical dust spikes far above the standard action levels.
• Humidity Robustness: Peer-reviewed data confirms our NextPM sensor technology resists false alarms caused by fog and moisture, ensuring your alerts are real.

Reliability is the foundation of our operation. Sensorbee is proudly certified to ISO 9001:2015 and ISO 14001:2015, verifying our high standards in quality management and environmental responsibility.

• Quality Management (ISO 9001): We ensure consistent performance across the development, manufacturing, and sales of our solutions.
• Environmental Responsibility (ISO 14001): We actively control emissions and manage environmental impacts within our own business.
• By partnering with Sensorbee, you are choosing a supplier that is independently audited for both operational quality and sustainability.

Sensorbee equipment is designed to support compliance with the UK and European standards that govern environmental monitoring on construction sites, industrial installations, and urban networks.

• BS 5228-1:2009+A1:2014 — Code of Practice for Noise and Vibration Control on Construction and Open Sites. The Sensorbee Sound Level Meter provides LAeq, LAFmax, and statistical Ln metrics required for BS 5228 noise assessments.
• BS 7385-2:1993 — Evaluation and Measurement for Vibration in Buildings. The Sensorbee Vibration Sensor measures Peak Particle Velocity (PPV) and peak frequency for direct comparison against BS 7385 guide values.
• BS 6472-1:2008 — Guide to Evaluation of Human Exposure to Vibration in Buildings. Vibration dose values (VDV) can be derived from Sensorbee triaxial vibration data.
• EN 12341:2014 — Reference Method for Gravimetric Determination of PM10 and PM2.5 Mass Concentration. The MCERTS certification of the Sensorbee Air Pro 2 includes validation against this reference method.
• CE Marking — All Sensorbee products carry the CE mark, confirming compliance with EU health, safety, and environmental protection standards. The Air Pro 2 also complies with the EU Radio Equipment Directive (RED) and RoHS.
• EN 18031-1:2024 — Common Security Requirements for Internet-Connected Radio Equipment. The Sensorbee Air Pro 2 Cellular has been assessed against EN 18031-1 under the Radio Equipment Directive Article 3(3)(d) and holds a published self-declaration of conformity covering all nine applicable security mechanism categories: access control, authentication, secure firmware updates (ECDSA P-256 signed via MCUboot), secure storage (hardware-isolated credential storage in the nRF9160 modem), encrypted communication (DTLS over LwM2M), device resilience, cryptographic key management, general equipment capabilities, and cryptographic algorithm compliance. Read our detailed technical explanation of what EN 18031-1 requires and how LwM2M addresses it.

We align our technology with the Institute of Air Quality Management (IAQM) protocols, including the 2018 Guidance on risk assessment and action levels, and the critical 2025 Position Statement.

• 2018 Standard: Defines the critical 190 µg/m³ PM10 action level for construction sites.
• 2025 Update: Mandates evidence of performance in high-load construction environments.
• Sensorbee meets the 2025 requirement for proven accuracy during high-concentration dust events.

Calibration is the process of comparing a measuring instrument's readings against a known reference standard, then adjusting or documenting any deviation. In environmental monitoring, regular calibration ensures that sensors deliver accurate, legally defensible measurements of pollutants like PM2.5, NO2, and noise levels. Without calibration, sensor drift over time can lead to inaccurate readings — data that regulators, planning authorities, and courts may reject.

• Definition of Calibration: Calibration compares instrument output against a traceable reference standard of known accuracy. The difference between the measured value and the reference value is recorded, and adjustments are applied to bring the instrument within its published accuracy specification. This process is fundamental to all scientific measurement, from laboratory instruments to field-deployed environmental sensors.
• Why Calibration Matters: Environmental monitoring data is only as reliable as the calibration of the equipment producing it. Sensors that measure PM2.5, NO2, noise, and vibration must be calibrated to ensure their readings correspond to true concentrations and levels. Regulatory bodies including the Environment Agency expect monitoring data to be generated by calibrated instruments — particularly where that data supports planning conditions, environmental permits, or legal proceedings.
• Factory vs Field Calibration: Factory calibration takes place in controlled conditions before a sensor is shipped, using reference aerosols, gas mixtures, or acoustic sources traceable to national measurement standards. Field calibration involves periodic checks or co-location with reference instruments at a monitoring site to verify that the sensor remains accurate under real-world conditions. Both are important — factory calibration establishes the baseline, while field validation confirms ongoing accuracy.
• Calibration in the MCERTS Framework: MCERTS certification requires that instruments demonstrate acceptable performance against reference methods. For the Sensorbee Air Pro 2, this included validation against the reference-grade Fidas 200S system. Ongoing calibration traceability is a condition of maintaining the confidence that MCERTS certification provides.

Every Sensorbee sensor module is individually calibrated before shipping. Calibration is traceable to national reference standards, ensuring measurement accuracy from day one. The Particle Matter Module (SB4102) undergoes a 3-point calibration process and ships with its own calibration certificate.

• Individual Calibration: Each sensor module is calibrated individually — not batch calibrated — ensuring every unit meets its published accuracy specification.
• Calibration Certificates: Shipped with every Particle Matter Module, documenting the calibration date, reference standards used, and measurement uncertainty.
• Field Validation: The MCERTS test programme validated performance against the reference-grade Fidas 200S at a live monitoring station, confirming accuracy under real-world conditions.

Common questions about MCERTS certification, ISO standards, and environmental monitoring compliance in the UK.

• What does MCERTS certified mean? MCERTS stands for the Environment Agency's Monitoring Certification Scheme. It is the UK's quality standard for environmental monitoring equipment. When a monitor is MCERTS certified, it has been independently tested and verified to meet defined performance standards for accuracy, precision, and reliability. The Sensorbee Air Pro 2 holds MCERTS certification for both PM10 and PM2.5 indicative monitoring.
• Is MCERTS certification required for construction monitoring? MCERTS certification is not universally mandatory, but it is increasingly required by planning conditions and Environment Agency guidance. Many local planning authorities now specify MCERTS-certified dust monitoring as a condition of consent, particularly for sites classified as medium or high risk under IAQM guidance. Using MCERTS-certified equipment ensures your data is legally defensible.
• Which Sensorbee products are MCERTS certified? The Sensorbee Air Pro 2 Cellular (SB8202) with MCERTS Particle Matter Module (SB4102) is MCERTS certified for PM10 and PM2.5 indicative ambient particulate monitoring. Certificate number: CSA MC250462/00, issued by CSA Group and independently tested by Bureau Veritas.
• What is ISO 17025 and does Sensorbee hold it? ISO/IEC 17025 is the international standard for testing and calibration laboratory competence. While Sensorbee does not operate an ISO 17025-accredited laboratory, our MCERTS certification is awarded by CSA Group — an accredited certification body — and our sensor modules are calibrated using reference standards traceable to national measurement institutes. Sensorbee holds ISO 9001:2015 and ISO 14001:2015 certifications.
• What does calibration mean in environmental monitoring? Calibration is the process of comparing a sensor's readings against a known reference standard and documenting or correcting any deviation. For environmental monitors measuring PM2.5, NO2, noise, or vibration, calibration ensures the data is accurate and legally defensible. Factory calibration establishes baseline accuracy before deployment, while field calibration verifies ongoing performance under real-world conditions. Sensorbee sensor modules are individually calibrated (not batch-calibrated) using reference standards traceable to national measurement institutes.