HARS-LX系列是全球最高精度的連續可調電阻箱，可滿足絕大多數的校準和測試應用。
高精度 - 可達到20ppm
高穩定性 - 可達到5 ppm/yr
具有55個型號覆蓋從1 mΩ 到 121.1 MΩ輸出範圍
解析度可達到 1 mΩ 或使用變阻器達到 20 μΩ
溫度穩定係數高 - 3 ppm/°C
美國軍方電阻標準
| Resistance per step | Total decade resistance | Max current | Max power | Temperature coeffcient (±ppm/ºC) | Power coeffcient (±ppm/mW) | Accuracy* | Stability (±ppm/yr) | Decade positions | Resistor type |
| whichever applies frst | |||||||||
| 20 μΩ Rheostat | 10 mΩ | 2 A | NA | 20 | 1 | Continuous | Resistance wire | ||
| 1 mΩ | 10 mΩ | 2 A | NA | 20 | 1 | ±(20 ppm+0.5 mΩ) | 20 ppm+0.5 mΩ | 11 positions "0"-"10" | |
| 10 mΩ | 100 mΩ | 2 A | NA | 20 | 1 | 10 positions "1"-"10" (10 mΩ minimum reading) | |||
| 100 mΩ | 1 Ω | 2 A | NA | 20 | 1 | 11 positions "0"-"10" (12 positions "0"-"11" for highest decade) | |||
| 1 Ω | 10 Ω | 1 A | 5 W | 20 | 0.4 | Wirewound hermetically sealed low-inductance | |||
| 10 Ω | 100 Ω | 0.33 A | 5 W | 10 | 0.3 | ||||
| 100 Ω | 1 kΩ | 0.1 A | 5 W | 3 | 0.1 | ||||
| 1 kΩ | 10 kΩ | 33 mA | 5 W | 3 | 0.1 | 10 ppm (<5 ppm typical) | |||
| 10 kΩ | 100 kΩ | 10 mA | 5 W | 3 | 0.1 | ||||
| 100 kΩ | 1.1 MΩ | 3 mA | 5 W | 3 | 0.1 | ||||
| 1 MΩ | 11 MΩ | 1 mA | 1,500 V peak | 3 | 0.1 | ||||
| 10 MΩ | 110 MΩ | 1,500 V peak | 15 | 0.2 | ±0.02% | 50 ppm | Metal oxide | ||
| Wiring and switch resistance | NA | 50 µΩ/ºC | 0.2 µΩ/W | NA |
