Apr 01, 2018 · Osmar, the open-source microsyringe autosampler mounted on top of a gas chromatographer. Because it is open-source, osmar can be built in many different sizes. Here, once fully assembled, osmar had a useful sampling space measuring 60 cm on the Y axis, 45 cm on the X axis, and 22 cm on the Z axis ( Fig. 1 ). This is a large space comparable to