- Digital torque tester with external sensor, to test torque wrenches, torque screwdrivers and other torque tools
- Digital torque tester with clockwise and counter-clockwise operation
- Peak, track and first peak working modes
- Unit: cN.m, in.lb, kg.cm
- Low and high limits with judgement
- Target torque value can be set (10 target torque values can be saved and selected quickly), with audible and visible alarm: green LED light on and buzzer sounds when the value is 80%~100% of target torque both green and red LED light on and buzzer sounds when the target torque value is reached
- Memory of 2000 measurement values for browsing and output
- Automatic power off
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| Code | range | Accuracy | Resolution | Square socket (L) | Power supply | Adaptor | Transducer dimension | Weight |
| IST-TT550 | 55 550 ~ N.m | ±1% lockwise and counter-clockwise (c ) | 0.1N.m | 3/4″ | DC | 3/4″ to 1/2″ 1/2″ to 3/8″ | 140x140x97mm | 2.8kg |