AADM-B19 Continuous Ambient Air Dust Monitor - Betaray

Introduction:
The AADM-B19 is designed for Continuous Monitoring of Environment parameter specifically Particulate Matters. Particulate measurements produced due to emissions of vehicle traffic, energy production plants, heating systems and various industrial plants. Mapping an area with respect to the concentration of the atmospheric particulate. Suitable to work in Mobiles vans, Fixed Station, On moving vehicles as cars, train, bus etc. This measuring system has been designed for making reliable continuous measurements without the presence of operators. AADM-B19 92
Capable of Monitoring:
PM 10-Inhalable Dust:
It is the fraction of airborne material which enters the nose and mouth during breathing and is therefore liable to deposition anywhere in the respiratory tract. The particle sizes of total inhalable dust are up to 100 microns.
 
PM 2.5-Thoracic Dust:
It is defined as those materials that are hazardous when deposited anywhere within the lung airways and the gas exchange region.
PM 1-Respirable Dust:
It is defined as that fraction of the dust reaching alveolar region of the lungs.
Application:
The Equipment is suitable for use for measurement of the dust concentrations present; in a specific location urban area, in a specific location industrial area, at working places, in the offices, in the transportation vehicles etc., in moving materials area, and inhaled by a person during a day.
Principle on which the Sensor works
Used air monitoring technique employing the absorption of beta radiation by solid particles extracted from air flow. So, the air is drawn from outside of the detector through an “infinite” (cycling) ribbon made from some filtering material so that the particles are collected on it. There are two sources of beta radiation placed one before and one after the region where air flow passes through the ribbon leaving particles on it; and there are also two detectors on the opposite side of the ribbon, facing the detectors. The sources’ intensity and detectors’ sensitivity being the same, the intensity of beta rays detected by one of detectors is compared to that of the other. Thus, one can deduce how much mass has the ribbon acquired upon being exposed to air flow; knowing the drain velocity, actual particle mass concentration in air could be assessed. The radiation source be a gas chamber, filled with a pieces of 14C-rich polymer plastic, such as PMMA. Detector is simply a Geiger–Mueller counter. The particulate matter content measured is affected by the moisture content in the air, unfortunately, hence adopted with appropriate sampling head.
Features:

• Meets the measurement requirement of EN 481 / DIN ISO 7708 standards and rules, CPCB Guidelinesfor workplace monitoring.
• Designed as per US EPA Standard along with Sampling head as per EPA standard.
• The microprocessor controller-based technology helps the system to perform accurately & efficiently.
• The methodology used for Dust Concentrations measurement, expressed as PM-10 monitoring in the air is using.
• Beta Ray Attenuation Principle with using external cutting impactors-based sampling head.
• Very reliable, simple design to ensure accurate service life.
• No need of shelter.
• Long term Calibration stability.
• The detector allows to assess cumulative mass concentration of suspended particulate matter (PM) in the ambient air.
• Sampling head is with heater, hence avoid humidity effect on sensor.
• High resolution reading at affordable cost.
• Pre-heating time required.
• Non-Corrosive components.
• Measurement at automatic Hourly cycles.