UM-2 thickness gauge Standard probe (PT-08) Carrying case Two 1.5V AA alkaline batteries Couplant Operating manual Certification of quality Packaging list Operating principle: Ultrasonic pulse/echo method with dual-element probes Probe zero adjustment: Selectable: 1-point calibration: normal measurement 2-point calibration: curve surface measurement or other special application with a high precision V-path correction: Automatic Measuring range: 0.8mm to 300mm; 0.031in to 11.81in Depending on probe, material and surface condition Digital resolution: H less than 4in : 0.001in /0.01in or 0.01mm/0.1mm H more than or equal to 4in : 0.01in or 0.1mm Units: Selectable: inch or mm Display: 128?4 dot-matrix LCD screen (1.65in?.24in; 42mm?7mm) EL backlight and switchable contract ratio Digit height: 0.54in or 13.75mm Measurement update rate: 4 Hz in standard measurement mode 25 Hz in MIN capture mode Material velocity range: 1000 to 9999 m/s; 0.039 to 0.394 inch/µs Power: Two 1.5V AA alkaline batteries Warning with low battery voltage Operating time: Up to 200 hours (without backlight) with alkaline batteries, depending on operating mode Auto shut-off: After 5 minutes of non-use Operating temperature: -10C to +50C; +14F to +122F Specification to -20C/-4F on request Weight: 200g / 0.44lb (including batteries) Dta logger capacity: Up to 500 readings can be divided into a maximum of 5 files (user-selectable) Optional accessories: Attachable rubber case Numerous special probes on request Couplants and high-temperature couplant 4-step/6-step block for calibration Data transmission cable Application software perating language: English and Chinese Measuring error: Up to 1in: +/-0.002in or +/-0.05mm Above 1in: +/-0.5%H H is the height of the testing object Repeatability: +/-0.001in or +/-0.025mm Interfaces: Serial RS 232C port in combination with a communicative cable; Data transfer parameters: 8 bits, 1 stop bit, 9600 baud, no parity.