Introduction   
UW-3 is for high precision, high resolution and ultra fine thickness measurements. It uses the most advanced microprocessor and ultrasonic technology to offer users many outstanding features. It presents highly stable and repeatable reading, high accuracy and resolution (up to 0.001 mm or 0.0001 inch) and ability for measuring ultra thin sample (as low as 0.15mm or 0.006 inch).

Features and Specifications
Operating principle:
I-E (interface-echo) mode with single-crystal delayed probe
E-E (echo-echo) mode with single-crystal delayed probe
Measuring range:
1.5mm to 18mm; 0.059in-0.709in in I-E mode
0.25mm to 10mm; 0.012in-0.394in in E-E mode
Depending on probe, material and surface condition
Digital resolution: 
H＜0.4in : 0.0001in/ 0.001in/ 0.01in or 0.001mm/0.01mm/0.1mm
H≥0.4in : 0.001in/ 0.01in or 0.01mm/0.1mm
Units: 
Selectable: inch or mm
Display: 
128×64 dot-matrix LCD screen (1.65in×2.24in; 42mm×57mm) 
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:
-10℃ to +50℃; +14℉ to +122℉;Specification to -20℃/-4℉on request
Size: 
5.86in×2.87in×1.25in; 149mm×73mm×32mm (H×W×D)
Weight: 
200g; 7oz (including batteries)
Data logger capacity:
Up to 500 readings can be divided into a maximum of 5 files (user-selectable)
Operating language: 
English and Chinese
Application software: 
UMVIEW
Interfaces: 
Serial RS 232C port in combination with a communicative cable; Data transfer parameters: 8 bits, 1 stop bit, 9600 baud, no parity.
Standard package:
UM-3 thickness gauge
Standard probe (single-crystal delayed probe)
Carrying case 
Two 1.5V AA alkaline batteries
Couplant
Operating manual
Certification of quality
Packaging list
Optional accessories:
Attachable rubber case
4-step/6-step block for calibration
Data transmission cable
Application software