MitechMT160 Ultrasonic Thickness Gauge 0.75-300mm (in Steel) 0.1/0.01mm

what is the max. and min. wall thickness measurement in inches of this device on steel?

Can I use to measure air compressor tanks?

Can you recommend a Ultrasonic Thickness Gage that can measure copper pipe wall thickness' down to at least 0.5 mm?

May i measure the thickness of a bottom plate of a ship in water? I mean floating on it?.