On site - Tank Ultrasonic thickness measurement ll Practical demonstration of thickness measurement 

I think NO. But I don’t have much idea about this

Plaster? What is the exact material?

@@NDTQuality plaster of wall and common material ( Mortar)

Don't have calibration block for different materials? ll Velocity correction in Ultrasonic testing ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-UGrsatyQKvQ.html Please check above video, through this technique, you can find unknown velocity of material also

It depends on your UTM procedure But as per our procedure, we take 1 spot at at least 1 meter

No. Aapko direct reading dikhega

Yes, You just have to set the velocity of the material in the machine first

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It's samsonic (MT-180 model)

Ok

It is couplant, you can use water or cellulose paste Ultrasound cannot pass through air, so some liquid required as couplant

Please contact me personally

Yes, it is through coating thickness measurement machine. You can measure part thickness without removing it.

Around 10 days

Please DM me for query