Moeller Swingarm Electric Sending Unit - Fits Tank Depth: 7-1/2"Moeller Swingarm Electric Sending Unit Fits Tank Depth: 6 to 12 Inches Swingarm Electric Sending Units gather fuel level information the same way as the mechanical sending units. It does, however, connect to a dash mounted gauge without a conversion capsule. Calibrated to 33 to 240 Ohms. They are also a DIY product, letting the consumer measure their tank depth and make the swingarm the correct length. Internal components will not rust or corrode.