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More free and not so free industrial surplus

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http://forum.allaboutcircuits.com – Free "GO" power line monitor. NIB 400vac 3phase trips @ 3-4.5% unbalance in 4-5 seconds or 10% low voltage. $5.00 each: Furnas overloads. Trip levels vary. Passive current relay. Opens dry contact at set ac current level. Works with only one or two legs connected as I recall. Muliple turns thru core divides trip level. More $5.00 items NIB OMRON photoelectric switches. E3X-DA11 12-24vdc Use with fiber optics These are neat versatile controls for hobby use. Also have some optics with about a 6" stainless steel bendable probe for sensing in tiny spaces. Pictures or specs if (Embedded)