You searched for "trigger module"
Omron
Omron DST1 Series Input/Output Module, 4 x PNP inputs Inputs, 4 x relay outputs Outputs, 24 V dc, NC
Part: DST1-MRD08SL-1
Industrial input/output module for PLC automation with 4 sensor inputs and 4 relay outputs.
Assemtech
Assemtech Rectangular Reed Switch, NC, 100V, 500mA
Part: PSB130/30
A magnetic reed switch that detects metal objects or magnets passing nearby, commonly used to trigger alarms or control equipment in industrial machinery and door/window sensors.
ABUS Security-Center
ABUS Rectangular Reed Switch, NC, 24V, 200mA
Part: MK1010W
A small magnetic reed switch that detects when a magnet is nearby, commonly used in door and window alarms and automated systems.
Omron
Omron Limit Switch, NC, IP67, Metal Housing, 30mA Max
Part: D5B-1515
A rugged limit switch that detects when machinery or equipment reaches a specific position and stops or triggers an action, protected by a metal case against dust and water.