Reduce Scrapping and Smelting, Promote Component Reuse > Complete Machines
> 1920 1940
> DuPage County
> Used
> Slotted opto isolator switch H21A1 sensor
Slotted opto isolator switch H21A1 sensor
The H21A1 consist of a gallium arsenide infrared emitting diode coupled with a silicon phototransistor in a plastic housing. The packaging system is designed to optimize the mechanical resolution, coupling efficiency, ambient light rejection, cost and reliability.
The gap in the housing provides a means of interrupting the signal with an opaque material, switching the output from an ON to an OFF state
Full data sheet available from /ds/H2/H21A1.pdf
