Measuring emissions with confidence
As a requirement of ISO/IEC 17025, companies must participate in proficiency testing schemes where an appropriate scheme exists, in order to maintain accreditation. NPL organises three proficiency testing (PT) schemes in this area: Particulate, Gas Measurement and Gas Cylinder
The Particulate scheme runs bi-annually with test items sent to participants. The Gas Measurement and Gas Cylinder schemes are run annually with measurements conducted at NPL.
Enquire about a stack proficiency testing scheme or to discuss how we can help your business
Find out more about stack testing schemes
Particulate stack emissions PT scheme
This scheme assesses performance with the weighing of foil shims and simulated particulate test probe washes. Foil shims are provided with known masses traceable to national standards. The standard deviation for proficiency testing is set from consideration of previous round results and with due consideration to relevant directives and standards. Foil shims and simulated probe washes are sent to participants
Calibration gas PT scheme
This scheme assesses the performance of test houses with the measurement of test gases from NPL certified cylinders. These measurements are conducted at NPL. The scheme involves the measurement of combustion gases (NOx, SO2, CO, O2 and VOCs) at concentrations and conditions typical of plant falling under the Industrial Emissions Directive (IED).
The gas measurement PT scheme
This scheme conducted at the stack simulator facility located at NPL. The scheme involves the measurement of combustion gases (NOx, SO2, CO, O2 and VOCs) at concentrations and conditions typical of plants falling under the Industrial Emissions Directive (IED). The aim of the scheme is to test a complete continuous emissions measurement system from sampling probe to analyser.
For further information and registration details, please visit our dedicated Stack PT Schemes website
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