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Thickness Gauges >> Couplants
Sonotech : Sono 950
High Temperature Couplant

 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.

SONO 950

- Less smoke than SONO 900

- Provides an extended time window for longer inspections

- Non-toxic, non irritating formula provides inspection safety

- Medium viscosity paste

- No Perfluorocarbons


Technical Specifications
Thickness Gaging*
(Less than 15 Second Contact)
600° to 925° F
315° to 510° C
Flaw Detection*
(1 - 5 Minute Contact)
600° to 725° F
315° to 385° C
Smoke Point
(Dense Plume)
850° F
454° C
Auto-Ignition Temperature



Viscosity** >3,000,000cps
Water soluble NO
Humectant NO
Halogens <2,500ppm
Sulfur <50,000ppm

* 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 plume fever" is not an operator hazard. Hot couplants can cause burns; therefore, gloves and goggles are recommended when working with hot surfaces.

** Viscosity equivalents: 4,000k = thick paste, 550k = stiff gel, 150k = pourable gel, 20k = thick liquid

Please call for quantity pricing

Note: For best results, allow a few seconds of "melt time" before taking reading. Signal attenuation may occur if used at lower than recommended temperatures.

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Model Description Part No. Price Add To Cart

Sono 950

Sono 950, 4 oz. Tube


Please email us or
call 1-800-635-9108 or 913-432-7080
for current pricing.

Sono 950

Sono 950, 1 Gallon


Please email us or
call 1-800-635-9108 or 913-432-7080
for current pricing.

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