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Sensor calibration is vital to get precise and accurate usable data for the desired application. Calibrating the sensors both before and after the installation of the devices plays an important role in the long-term precision of the sensor readings. Pre-deployment calibration is critical to identify and eradicate any sensor error by calculating the sensor offset and gain. While the periodic post-deployment calibration is significant to maintain consistency among sensor measurements and ensure system integrity.
All air quality monitoring systems are calibrated as per the international guidelines by USEPA (the United States Environmental Protection Agency) by the ISO/IEC 17025:2017 certified calibration laboratory to ensure the optimum data quality.
Oizom has a state-of-the-art lab calibration facility. Our devices are calibrated in-house and the calibration results are then verified by ATIRA, ensuring accuracy and reliability. ATIRA (Ahmedabad Textile Industry’s Research Association) is accredited under ISO/IEC 17025:2017, ensuring trusted third-party validation. A zero and span calibration of each gas sensor is performed in a clean and controlled lab environment as per Section 12.2 of USEPA Quality Assurance Handbook for Air Pollution Measurement Systems Volume II. The gas sensor calibration is performed using known concentrations of gases delivered from NIST (National Institute of Standards and Technology) traceable calibration gas standards.
After laboratory calibration with standard calibration gas cylinders, the monitors are operated adjacent to U.S. EPA designated Federal Equivalent Method (FEM) for 72 hrs for collocation calibration as per the US EPA Air Sensor Collocation Instruction Guide.
A custom built reference station is setup at our advanced calibration laboratory housing various referene grade analyzers including the Met One Instruments BAM-1020 for PM (- β-ray Attenuation), Horiba’s APNA-370 for NOx (Chemiluminescence), APMA-370 for CO (NDIR), APSA-370 for SO2 (UV Fluorescence), and APOA-370 for O3 (UV-absorption).
The reference station can hold upto 40 Oizom units at a time allowing the additional evaluation of intra-model variability through statistical parameters such as mean, median, and standard deviation.
Our devices are calibrated at our state-of-the-art calibration facility. The Calibration Reports are then verified by ATIRA to ensure the accuracy and reliability of the data. ATIRA (Ahmedabad Textile Industry’s Research Association) is an NABL-certified laboratory accredited under ISO/IEC 17025:2017, ensuring trusted third-party validation.
The consistency in the data accuracy which can deteriorate through wear, aging, and environmental influences is maintained through periodic remote calibration.
The patented e-breathing technology and custom OGS modules allows the user to perform the onsite calibration of the Oizom devices easily.
The units are spot calibrated using standard calibration gas cylinders of known concentration or by co-locating with a reference standard (which can either be a stationary reference station, an equivalent “gold standard” instrument, or a freshly calibrated Oizom monitor).
Oizom’s proprietary Calibration Software allows the end user to calibrate the air quality monitors and apply the calibration factors automatically to the device.
At Oizom, we believe in embracing the future by staying ahead of the curve.
As machine learning shapes the future technology, we are incorporating it into our air quality monitors to deliver unparalleled accuracy, calibration, and data insights.
Currently, our R&D team is diligently working on training data sets, enabling our monitors to recognize sensor patterns and generate reliable future predictions.
Integrating machine learning into our air quality monitors will revolutionize the hybrid model and remote calibration capabilities, making them more efficient and user-friendly.
Discover the future of air quality monitoring with Oizom’s advanced machine-learning solutions.
Schedule a call with our air quality experts to attain a solution for your unique air quality monitoring requirements.
1.
The factory calibrated sensor integrated in the OGS modules undergo vigorous QA/QC checks.
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2.
All units undergo zero and span calibration using known concentration NIST traceable calibration gas cylinders.
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3.
The units are operated adjacent to reference grade analyzers and collocated to achieve near reference accuracy.
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4.
The influence of seasonal changes in local environmental conditions is adjusted periodically by Oizom's Advanced data processing algorithms.
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5.
The consistency in the data accuracy which can deteriorate through wear, aging, and environmental influences is maintained through periodic remote calibration.
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