This European Standard specifies requirements and test methods for pressure sensing devices (referred to as psds) for the control of combustible gases of the first, second and third families, air, combustion products and mixtures there of for pressures up to 4 bar. It covers all types of psd including electronic, differential and inferential types. The requirements for 'S' class psd are intended to meet the requirements for increased reliability for steam boilers. The methods of test given in this standard are intended for product type testing. Tests intended for production testing are not specifically included.
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