| ELS-50 specifications | |||
| Model | 23BL | 235BL | 12C |
| Central wavelength (nm) (b) | 1310 ± 20 / 1550 ± 20 | 1310 ± 20 / 1490 ± 10 / 1550 ± 20 | 850 ± 25 / 1300 +50/–20 |
| Spectral width (nm) (b), (c) | ≤5 | ≤5 | ≥40/120 |
| Output power (dBm) | ≥–5 | ≥–5 | ≥–24 (50/125 μm) |
| Power stability (dB) (b), (d) | ±0.10 | ±0.10 | ±0.10 |
| Battery life (hours) (b) | 60 | 60 | 45 |
| Tone generation (Hz) | 270, 1 k, 2 k | 270, 1 k, 2 k | 270, 1 k, 2 k |
| Warranty (year) | 1 | 1 | 1 |
| EPM-50 specifications | |||
| Model | EPM-53 | EPM-53X | |
| Power meter port | InGaAs | InGaAsX | |
| Power range (dBm) (b) | 10 to –60 | 26 to –50 | |
| Number of calibrated wavelengths (c) | 5 | 5 | |
| Power uncertainty (d) | ±5 % | ±5 % | |
| Resolution (dB) | 0.01 | 0.01 | |
| Display units | dB/dBm/W | dB/dBm/W | |
| Tone detection (Hz) | 270, 1 k, 2 k | 270, 1 k, 2 k | |
| Battery life (hours) (d) | >300 | >300 | |
| Warranty (year) | 1 | 1 | |
| ELS-50: Note: All specifications valid at 23 °C ± 3 °C, with an FC/UPC connector. (b) Typical. (c) Rms for lasers and —3 dB width for LEDs. (d) After 15 minutes warmup; expressed as ± half the difference between the maximum and minimum values measured over 8 hours. EPM-50: Note: All specifications valid at 23 °C ± 3 °C, with an FC/UPC connector. (b) In CW mode. (c) Wavelengths: 850 nm, 1300 nm, 1310 nm, 1490 nm, 1550 nm. (d) Typical. | |||
| Size (H x W x D) | 189 mm x 78 mm x 37 mm (7 7/16 in x 3 1/16 in x 1 7/16 in) |
| Weight | 0.4 kg (0.9 lb) |
| Temperature (operating) | –10 °C to 50 °C (14 °F to 122 °F) |
| Temperature (storage) | –40 °C to 70 °C (–40 °F to 158 °F) |
| Relative humidity | 0 % to 95 % non-condensing |
| Power supply | 3 AA alkaline batteries |