Synchro-Start ESSE-2AM Electronic Speed Switch is a multi-channel speed sensing device designed to monitor rotating equipment and trigger speed-based control signals. The ESSE-2AM model supports 11 input channels and two speed-frequency ranges at 235 Hz and 920 Hz, with a compact 1.8 lb enclosure intended for panel mounting. Retail listings identify the part as ESSE-2AM within the Synchro-Start ESSE family (example listing 23505283), and several sources indicate this unit is discontinued by the manufacturer.
