SONO 950 provides coupling for thickness gaging and flaw inspection at high temperatures. SONO 950 will maintain acoustic coupling beyond 15 seconds to give ample time for obtaining good thickness readings. In most cases, the signal strength actually increases with time to the point of thermal decomposition.
1040° F
* A couplant's upper temperature range for short duration thickness gaging is higher than when used for flaw detection. When testing on vertical or overhead surfaces, a thicker grade of couplant is likely to stay in place, but thinner grade generally performs better on flat surfaces. No Sonotech couplants contain perfluorocarbons; thus "polymer fume fever" is not an operator hazard. Hot couplants can cause burns; therefore, gloves and goggles are recommended when working with hot surfaces.