Handheld Digital Ultrasonic Thickness Gauge Tester Meter ror Steel aluminum red copper zinc quartz glass

Specifications
1)Display：4.5 digits LCD with EL backlight.
2)Operating principle: ULTROSONIC
3)Measuring range (metric/imperial): 1.0-245mm,0.05-8inch (in Steel).
4)Resolution： 0.1mm;
5)Accuracy： ±（0.5%H+0.1）mm, depends on materials and conditions
6)Units: Metric/Imperial unit selectable.
7)Power supply:4x1.5 AAA size (UM-4) battery 1
8)Battery indicator: low battery indicator
9)Operating conditions:0-+45℃(32℉-104℉),≤90%RH
10)Dimensions: Main Unit 140mm×60mm×22mm
11)Gloss Weight :1KG
12)Standard Delivery: Main Unit,8mm Probe, Coupling Oil, User Manual ,Carrying Case
Note: due to the post do not accept the liquid, please kindly buy coupling at your local store, if you can not find the coupling agent at your local store, you can use the detergent or oil to replace, but please do not wash in water after using, you can clean by cloth or paper to avoid the rusty