This is a New, Old Stock, 4B Components BS1V10FC Binswitch

24-240V AC/DC

25mm Max. Sensing Distance  

2m Cable 

Detects level or plug situations in bulk granular solids or liquids  

Link provided for informational purposes only: 

go4b.com/usa/datasheets/binswitch-capacitance-point-level-indicator.pdf 

INV# 24B     RE 2019.09