意大利SELET光電傳感器，B50EG188A420

D.C. / A.C. - 2 wire series

D.C. / A.C. - 2 wire series 

 D01 - Amplified d.c. / a.c. 2 wire type series
Block type series

Block type series

 B01Q8 - 8 x 8 mm block type series amplified dc type, PNP - NPN
 B01Q - B01QM - Flat shape block type, amplificati in c.c, PNP - NPN series
 B01CF - Block type series amplified dc type, PNP - NPN
 B01Q80 - 80 x 80 mm block type series amplified dc type, PNP - NPN
 B03Q80 - Long range 80 x 80 mm block type series amplified dc type, PNP - NPN
 B01QO40 - 40 x 40 x 110 mm block type series with rotary head, amplified dc type, PNP - NPN
 B03QO40 - 40 x 40 x 110 mm block type long range series with rotary head, amplified dc type, PNP - NPN
D.C. fork type series

Fork type series

 B01F - Fork type series amplified dc type, PNP - NPN
D.C. ring type series

D.C. ring type series

 B01AN - Ring type series amplified dc type, PNP - NPN