Reaction vessel fabricated of borosilicate glass to accommodate the 7874, 7875 or 7876 immersion wells only, With #50 Screw thread at top which accepts a 7506-14 bushing and FETFE o-ring to form a compression seal with the immersion well, one- 14/20 angled joint for sparger tube, one- 24/40 vertical joint for condenser and one #7-Screw thread side arm for thermometer. Bottom of reactor is flat to allow use of magnetic stirrer. Volumes indicated are total volumes. Working volume in reactive area of lamp is approximately 40-50% of total volume. Complete unit consists of vessel, sparger tube, PTFE stir bar, threaded nylon thermometer bushing, #50 nylon bushing and three meters of 4.8mm ( 3/16-inch) I.D. PTFE tubing.