Bursting strength tester, The SDL Atlas M229P PnuBurstâ„¢ determines the bursting strength and distension at burst of woven, knitted and non-woven fabrics, paper and paperboard. The PnuBurst employs a precision pneumatic system. The bursting pressure is applied to a circular specimen and distends it to its point of rupture. The measurement of bursting strength is expressed in kilopascals (kPa), bar, and psi. The maximum pneumatic pressure (depending on compressed air supply) is 1500 kPa, 15 bar or 200 psi.