Thorlabs PM20CH Optical Power Meter

The PM20CH is a compact, handheld fiber-optic power meter covering a wavelength range of 800 nm to 1700 nm, with a measuring range from –50 dBm to +23 dBm (approximately 10 nW to 200 mW).

It uses an InGaAs detector, features an alphanumeric 8-digit LCD, a kickstand, a rugged enclosure, and interchangeable fiber adapters (FC standard with optional SMA/SC/ST).TT

Power supply is via an internal NiMH rechargeable battery (6 V)

• the unit offers long battery life, roughly estimated at up to 50 hours.

• Displays in multiple units (dBm, dB, W), supports absolute/relative mode, and offers NIST-traceable wavelength calibration in 5 nm steps.