supply of digital ultrasonic thickness gauge. , digital ultrasonic thickness gauge model - samsonic utg-222 or similar type brand/model wi th accessories for testing of thickness of various materials, display: 4.5 digits lcd with el backlight, meas uring range: 0.75-300mm (steel),sound velocity range: 1000-9999 m/s, resolution: 0.01 mm, accuracy: +/-( 0.5% thickness+0.04)mm , units: metric/inch, communication: r232 serial port, power supply: two aa size 1.5 volt alkalinebatteries 100 hours typical operating time (el backlight off), dimension: 150x74x32 mm, weight: 245 gm. [ warranty period: 30 months after the date of delivery ] ]