OHN3120U - 

Optek Magnetic Hall Effect Sensor
Range of hallogic hall-effect sensors from Optek are designed for use within non-contact switching operations. The hall-effect sensors comprise of an integrated monolithic circuit with hall element, linear amplifier & Schmitt trigger all on a single silicone chip. Thanks to this robust design, this range of hall-effect sensors operate with excellent temperature stability in more demanding environments. The Optek hallogic hall-effect sensors allow for direct driving more than 7 TTL loads. Also supports standard logic family for power supplies ranging from 4.5 V to 24 V, with switching frequencies from DC to 200 kHz.