[en] A deuterium pellet injector built for the reversed field pinch Eta Beta II is described. The pellet gun is the versatile type developed at Risphi. Pellets are small, 0.38 or 0.72 mm diam., and rather slow, 100 m/s. They are transported to Eta Beta II through a guide tube system, which they leave with an angular spread below 1⁰ and are then injected through a long radial tube. The pellets are detected by optical pellet detectors the signals from which are used to trigger the firing of Eta Beta II. The injector is operated automatically by means of a PLC