Comparison : Item # 0009-5174, Purge Gas Generator- 0.5 SCFM (14 lpm), air compressor required- 110V
Item # 0009-5176, Purge Gas Generator- 1.0 SCFM (28 lpm), air compressor required- 110V
Item # 0009-5177, Purge Gas Generator- 1.0 SCFM (28 lpm), self contained- 110V
Item # 0009-5178, Purge Gas Generator- 3.0 SCFM (85 lpm), air compressor required- 110V