No. 930 is used for liquid flow solder masking under a nitrogen atmosphere. The electrically heated, 500°F (260°C) inert atmosphere cabinet oven has a 38 x 38 x 38" work space. Special inert atmosphere construction features include a pressure regulator; flowmeter; pressure gauge; inner oven walls sealing directly against a 0.5" silicone rubber door seal; air jacket on the inner oven for cooling; blower shaft seal; positive latching door hardware; adjustable offset door hinges; outlet with pressure relief; interior seams welded gas-tight; and all oven wall penetrations equipped with compression fittings to maintain atmosphere integrity. It includes a digital programming temperature controller, manual reset excess temperature controller with separate contactors, recirculating blower airflow safety switch and fused disconnect switch.