/ Precision Measuring Tools / Precision Hand Tools / Hardness & Surface Roughness Testers / Durometer, Ultrasonic Thickness Gage and Coating Thickness Gage Accessories / PT28287 * Not actual product image PT28287 Coupling Gel - 8 oz. for 3807 and 3812 Ultrasonic Thickness Gages 67666 3812 Ultrasonic Thickness Gage Coupling Gel - 8 oz for 3812 Ultrasonic Thickness Gage When using the 3807 and 3812, there must be no air gaps between the wear-face and the surface of the material being measured. This is accomplished with the use of a coupling fluid, commonly called couplant. This fluid serves to couple, or transfer, the ultrasonic sound waves from the transducer, into the material, and back again. Before attempting to make a measurement, a small amount of couplant should be applied to the surface of the material being measured. Typically, a single droplet of couplant is sufficient. Coupling Gel - 8 oz. Specifications Product Testimonials Other similar products 3812 Ultrasonic Thickness Gage PT28287 Coupling Gel - 8 oz. for 3807 and 3812 Ultrasonic Thickness Gages Contact Starrett Specifications Made in America: Yes Product Testimonials Write a product review Write a product review Comments* First Name* Last Name* Email* Occupation The information you provide will be used in accordance with the terms of our privacy policy. I agree to the privacy policy. Please provide the required information. Thank you for submitting a product testimonial on www.starrett.com. By submitting information to Starrett, you acknowledge and give express permission for the L.S. Starrett Company to use and share your statements.