The PDA10CS is a switchable-gain, amplified InGaAs detector designed by Thorlabs for the detection of light signals over 700-1800nm wavelength range. An eight-position rotary switch allows the user to vary the gain in 10 dB steps. A buffered output drives 50Ω load impedances up to 5 volt. The PDA10CS housing includes a removable threaded coupler (SM1T1) and retainer ring (SM1RR) that is compatible with any number of Thorlabs 1” threaded accessories. This allows convenient mounting of external optics, light filters, apertures, as well as providing an easy mounting mechanism using the Thorlabs cage assembly accessories. The PDA10CS has two #8-32 tapped mounting holes with a 0.25” mounting depth and includes a 120VAC power AC/DC supply. The PDA10CS-EC has two M4 tapped mounting holes and includes a 230VAC AC/DC power supply.