Sell Used Agilent 81623A Optical Head Power Sensor (warranty). This unit fluctuates around 72dBm after zeroing (should be reading -80dBm or less), so is slightly noisy.
Specifications:
| Manufacturer | Agilent |
| Optical Wavelength Range | 750 - 1800 nm |
| Optical Power Range | +10 dBm to -80 dBm |
| Sensor Element | Ge |
| Wavelength Accuracy | +/- 3.5% (1000 to 1650 nm) |
Included: