USB communication interface
Automatic identification of impact test direction
Memory of 270 average testing in 9 group files
Upper and lower limit setting
Automatically switch off
Backlight for convenient use in darkness
Battery capacity display
AAA1.5V battery
Integrated calibration function
TH170: integrated with D impact device for normal hardness testing
TH172: integrated with C impact device for hardness testing on thin, light and face-hardened workpieces
TH174: integrated with DL impact device for hardness testing of deep grooves and tooth surface