| Measurement principle | Magnetic Induction and eddy Current |
| margin of error | +/- (1~ 3% n) or +/- 2.5um |
| resolution | 0.1 um (less than 100 um) or 1 um (greater than 100 um) |
| Minimum measurement surface | 6mm |
| minimum curvature | F-type convex 1.5mm/concave 25mm; NF-type convex 3mm/concave |
| thinnest matrix | 0.3mm |
| Power Supply | 2X1.5AAA 7 batteries |
| Operating temperature | Temperature -5~ 50 ℃ |
| Relative Humidity | Humidity < 95% RH |
| Machine Weight | 90G (without battery) |
| Machine size | 120x63x25mm |
Warranty days: 365 days
1. For product quality problems caused by non-human products of instruments and equipment, the manufacturer will provide free warranty services during the warranty period;
2. There is no warranty period for fragile and consumable parts, and if you find product quality problems after receiving the goods, please apply for return and exchange within 7 days, and you will not wait for the overdue ones;