optical sensor

$125 apex classic with display $25 Neptune solenoid valve $20 optical sensor (have 4) Shipping included

---Price: $550 shipped for the Pro Pack--- I'm selling a gently (1 week) used Hydros Pro Pack that includes: Xp8 X4 Temp Probe PH Probe (never been dry) 2 bus terminators All cables that come with the pack The Pro Pack is being sold as a complete package. I will part it out later if it...

Hi all, So I'm planning my ATO and am going to do a min/max set up - the lower sensor tells the controller when to open the solenoid and the upper tells it when to close the solenoid. Is it better to use one mechanical and one optical or both the same? If it's one of each, does one work...

I want to use this same type of magnetic eye but use the APEX breakout. Has anyone done this? Where can I get an optical sensor like this that would work with the APEX, without buying the FMK. This one was just released from Smart Aqua...