| Model | ALK-1201 | ALK-1301 | ALK-1231 |
| Configuration | Power Meter + Light Source | Power Meter+Visual Fault Locator(10mw) | Power Meter+Light Source+Visual Fault Locator ( 10mw ) |
| Optical Power Meter Module |
| Detector Type | InGaAs |
| Measurement Range(dBm) | -70~+6 | -50~+26 |
| Uncertainty | 5% |
| Calibrated wavelengths(nm) | 850、1300、1310、1490、1550、1625 |
| Resolution(dB) | 0.01 |
| Optical Connector | FC(interchangeable SC,ST) |
| Optical Light Source Module |
| Emitter Type | FP-LD |
| Wavelengths | 1310/1550(other wavelengths can be optional) |
| Ouput Power(dBm) | -7 |
| Spectral Width | ≤10nm |
| Output Stability | ±0.05dB/15mins; ±0.1dB/ 8hours |
| Optical Connector | FC/ PC |
| General Specifications of Multi Meter |
| Power Supply | Alkaline Battery(3 AA 1.5V batteries) |
| Battery Operating Time | ≥60 hours(Both Power Meter and Ligh Source are working) ≥240 hours(Only Power Meter is working) |
| Auto-off time | 10mins |
| Operating Temperature(℃) | -10~+60 |
| Storage Temperature(C) | -25~+70 |
| Dimension(mm) | 200 X90 X50 |
| Weight(g) | 285 |