SKM01 water-based acoustic emission / ultrasonic coupling agent is a colorless or light-colored transparent gel, only a small amount of bubbles, all insoluble matter. Is a thick liquid, non-toxic, tasteless, non-irritating, is not lost on the vertical wall, longitudinal sound waves up to 2210m / s. Widely used in acoustic emission testing and steel, castings and forgings, weld ultrasonic testing and thickness measurement. List of coupling agent performance indicators SKM01 sound performance indicators Name Value Unit No. 1 speed of sound (35 ℃ when) 1520 ~ 2210 m / s 2 acoustic impedance ratio (35 ℃ when) 1.5 * 106 ~ 1.7 * 106 Pa s / m 3 temperature? - 20 ~ + (when 35 ℃) 90 ℃ 4 sound attenuation ≤0.05 dB / (cm? MHz) 5 Viscosity (25 ℃ when) ≥15 Pa? s 6 PH value of 5.5 ~ 8 SKM01 acoustic emission / ultrasonic couplant single bottle capacity for 80ml. The first time you use needs to be broken bottle top, and then you can out of the coupling agent, will run out of a broken bottle top cover down to seal the opposite direction.