![]() The efficiency of sampling depends on conditions at which sample was taken. Number of traverse points may be selected as mentioned in below table: Cross section area of stackĪ post shared by Perfect Pollucon Services more about Stack Monitoring Procedure Isokinetic Conditions Generally traverse points are selected from cross section of the stack perpendicular to the gas flow is divided into specified number of equal area. So traverse points have to be located to achieve this while selecting Sampling point in Stack monitoring. This is necessary because velocity and concentration of gases will be different across cross section of the stack. This method is called as Isokinetic Stack Sampling. In order to sample to become representative, it should be collected from various points across the stack. Also that extension can be closed during non-sampling period. The size of sampling point can be made in range of 7-10 cm in diameter. Therefore there has be a provision in stack for sampling points. Opening in stack for sampling is absent in majority of stacks. Know more About Stack monitoring Size of sampling point To select best sampling point it advised that it should be at a distance 5-10 diameters for downstream and 3-5 diameters from upstream disturbance. The sampling point in Stack Monitoring should be far from any disturbance, bends, baffles etc. Know about Environmental Quality Monitoring Stack monitoring is part of Air Quality monitoring in Environmental monitoring. The selection of best sampling point is always a matter of individual decision in any type of sampling process. Corrosion Control at Data Center / IT Industry.Operation and maintenance of Effluent Treatment Plant.MPCB Consent to Establish, Operate and Renewal.Drinking Water Quality Testing & Analysis Laboratory.Soil Testing & Investigation Laboratory.Indoor Air Quality Monitoring & Testing.Ambient Air Quality Monitoring & Testing.
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