If you're stocking parts, the Allen-Bradley 700-N400A1 is a familiar option that many techs already trust stands out about the Allen-Bradley 700-N400A1 is how well it behaves in noisy electrical environments.
Zenith Controls ARSM-4 Solid State Voltage Sensor w Base 240-480V 10A 11-Pin
A nice touch is how the type reads NULL a minimalist, adaptable approach.