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| Specifications | Range | UT121A | UT121B | UT122 |
| AC voltage (V) | 6.000V/60.00V/600.0V | ±(1.0%+3) | ±(1.0%+3) | |
| 6.000V/60.00V/600.0V/750.0V | ±(1.5%+3) | |||
| AC voltage frequency (Hz) | 10Hz-1kHz | ±(0.5%+2) | ±(0.5%+2) | ±(0.5%+2) |
| DC voltage (V) | 6.000V/60.00V/600.0V | ±(0.7%+3) | ±(0.5%+3) | |
| 6.000V/60.00V/600.0V/1000.0V | ±(1.2%+3) | |||
| Resistance (Ω) | 6000Ω/60.00KΩ/600.0KΩ/6.000MΩ/10.00MΩ | ±(2.0%+5) | ||
| 600.0Ω/6.000KΩ/60.00KΩ/600.0KΩ/60.00MΩ | ±(2%+5) | |||
| 600.0Ω/6.000KΩ/60.00KΩ/600.0KΩ/6.000MΩ/60.00MΩ | ±(2.0%+5) | |||
| Capacitance (F) | 60.00nF/600.0nF～600.0μF/6000uF～60.0mF | ±(10%+5) | ||
| 99.99nF/999.9nF～9.999μF/9.999mF～99.99mF | 10% | |||
| Frequency (Hz) | 10.00Hz-10.00MHz | ±(0.1%+3) | ±(0.1%+3) | |
| Temperature(℃/℉) | –40℃～1000℃/–40°F～1832°F | ±3℃/±6℉ | ±3℃/±6℉ | |
| Features | ||||
| Display count | 6099 | 6099 | 6199 | |
| Dual display | √ | √ | √ | |
| Auto range | √ | √ | √ | |
| NCV detection | √ | √ | √ | |
| LIVE detection | √ | √ | √ | |
| Diode test | / | √ | √ | |
| Continuity buzzer | √ | √ | √ | |
|  LCD high voltage alert | √ | √ | √ | |
| Flashlight | √ | √ | √ | |
| Low battery indication | √ | √ | √ | |
| Auto power off | √ | √ | √ | |
| Data hold | √ | √ | √ | |
| Category ratings | CATâ…¢ 600V | CATâ…¢ 600V | CATâ…¢ 600V | |
| General Characteristics | ||||
| Standard accessories | UT121A: Batteries, test leads, English manual; UT121B/UT122: Batteries, test leads, temperature probe, English manual | |||
| Power | 2*1.5V AAA | |||
| Display | UT121A/UT121B: 52*66mm; UT122: 65*55mm | |||
| Product size | UT121A/UT121B: 143*74*17mm; UT122: 144*71*15.5mm | |||
| Product net weight | UT121A/UT121B: 142g; UT122: 157g | |||
| Standard individual packing | Gift box, carrying bag | |||
Industrial Weatherproof Male Female Plug & Socket 5x32A Set 
UT121 Series Smart Digital Multimeters UNI-T