An Miao AS-120 series Shore Hardness Tester is mainly used to measure the indentation hardness of the material. It has a variety of different scales to indicate the hardness of the tested material, divided into AS-120A, AS-120B, AS-120C, Eight models of AS-120D, AS-120E, AS-120O, AS-120DO, and AS-120OO provide eight measuring instruments with different measuring probe sizes, measurable objects and hardness values to meet the needs of users for the hardness of different objects Measure the needs of your application.
GB/T 531-1999 "Rubber Pocket Durometer Indentation Hardness Test Method"; GB/T 2411-80 "Plastic Shore Hardness Test Method"; DIN53505, ISO868, ISO7619, ASTMD2240, JIS K7215.
* Integrated design, small size and light weight.
* It has the functions of maximum value lock, underVoltage alarm indication, automatic shutdown and manual shutdown.
* Use USB data line output to communicate with PC.
* Provide Bluetooth data output option.
* When the battery Voltage is lower than the specified value, it will be automatically indicated.
* Digital display, no parallax.
* metric/imperial unit conversion, with average calculation function.
* Automatic shutdown and manual shutdown.
* Using computer technology, digital filtering technology and many other professional technologies, it can accurately measure the material thickness.
* Using optional RS232C software and cables, it can communicate with PC computer to realize functions of data collection, processing, analysis and printing.

| model | Stylus | Measurable material | Hardness value |
| A | 0.79 truncated cone | Soft rubber, soft vulcanized rubber, natural rubber, nitrile rubber, thermoplastics, thermoplastic elastomers, waxes, felt products, leather products | 20-90A |
| B | R0.1 cone | Moderately hard rubber, thermoplastics, thermoplastic elastomers, fibrous materials for paper products | Greater than 90A; less than 20D |
| C | 0.79 truncated cone | Medium hardness rubber, medium hardness plastic, thermoplastic, thermoplastic elastomer | Greater than 90B; less than 20D |
| D. | 0.79 truncated cone | Hard plastics, hard rubbers, hard thermoplastics, hard thermoplastic elastomers | More than 90A |
| do | R1.2 hemispherical | Moderately hard rubber, thermoplastics, thermoplastic elastomers, high density textile spindles | Greater than 90C; less than 20D |
| o | R1.2 hemispherical | Soft rubber, thermoplastics, thermoplastic elastomers, very soft plastics, thermoplastics, medium density textile spindles | less than 20DO |
| E. | R2.5 hemispherical | Hard sponge, EVA | Greater than 90DO; less than 20A |
| OO | R1.2 hemispherical | Very soft rubber, very soft plastics and thermoplastics, sponges, foams, low density textile spindles, human and animal tissues | less than 20O |




