Model	Instrument Type	Form Factor	Low end wavelength limit	High end wavelength limit	Wavelength Resolution	Wavelength Accuracy	Dynamic Range
FTB-5240	Portable		1250 nm	1650 nm	1 mm	15 pm	Power range: 18 to -75 dBm
FTB-5240B	Portable		1250 nm	1650 nm	1 mm	15 pm	Power range: 18 to -75 dBm
IQ-5240	Benchtop	Double-pass Littman-Metcalf monochromator	1250 nm	1650 nm	60 pm		Dynamic range (C-band) @ 1 nm from peak (dBc) >50 @ 0.4 nm from peak (dBc) >45 @ 0.2 nm from peak (dBc) >35
IQS-5250B	Benchtop	Fabry-Perot	950 nm	1650 nm	1 mm	15 pm	+18 dBm down to -75 dBm