The Model 131 streak image is 3,250 pixels in the spatial axis, and 14,000 pixels along the temporalaxis. Optional extended record configurations offer up to 43,000 pixels on the temporal axis.The Model 131 has large pixels at 7.4 micron pitch. This allows for better dynamic range, as thesaturation threshold of the pixels is relatively high. The Model 131 is offered with two alternativerotating mirror turbines: the standard 1209 turbine operates to 5,000 rps and the optional 1231turbine operates to 7,500 rps. The turbines can reach 50% of full speed using compressed air ornitrogen. Helium is required to reach full speed.