Sensing
 method

Sensing distance

Output
 type

Output
 configuration

Cable length

Cable length from
 emitter to amplifier

Model

Through-beam
 type

300 mm

NPN
 output

Dark-ON

2 m

0.5 m

EE-SPW321

1 m

EE-SPW321-A

Light-ON

0.5 m

EE-SPW421

1 m

EE-SPW421-A