The S10140/S10141 is a series of back-thinned fast Fourier transform CCD image sensors from Hamamatsu Corp. Designed for spectrophotometry and low-light-level detection from 200 to 1100 nm in scientific applications, the devices are available in noncooled and thermoelectrically cooled versions. They have an effective pixel size of 12 × 12 μm, with image areas ranging from 1024 × 122 pixels to 2048 × 506. Back-thinning produces high quantum efficiency with maximum sensitivity at 660 nm. Readout noise is 4 e− rms. Thermal efficiency results from the hermetic seal and from cooling only the chip. No moisture or condensation builds up within the sensor package. The binning function improves the signal-to-noise ratio and the signal processing speed.