The sensor belongs to OPTEK technologies, OPB742D and OPB606A are the two sensors Im using.
Here are the Sensor Data,
http://www.optekinc.com/pdf/OPB740.pdf
http://www.optekinc.com/pdf/OPB606a.pdf
The voltage picked up from my Multimeter reads DC 0.4V maximum using a 1.5V double A battery source.
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Also, in hopes of getting rid of the use of Inverters, I've tried instead of setting INPUT; at the end of the IO's, I set them to 0;
IO4 = IO5 = IO6 = IO7 = IO8 = IO9 = IO10 = INPUT; <---------Before
IO4 = IO5 = IO6 = IO7 = IO8 = IO9 = IO10 = 0; <---------After
And I'm still not sure if it works, although the voltage between SIG and BLK is gone, I havnt found a way to trigger it so it goes high.