Okay, they’re just strips of metal, but CJ says one of each and a grapefruit will get you at least a “C” at the science fair. The copper electrode is 100mm long x 18mm wide  x .8mm thick (3.94" x .7" x .041”). The zinc electrode is 4” long x 3/4” wide x .027” thick and stamped “ZN”. And both of them are awfully useful for crafters and jewelry makers, too.

Our VP for Sensing Fluid Pressure called this sensor from Kavlico “sweet.” Needs a 5VDC 20mW power source, and will likely put out 0-4VDC, contingent on pressure, from 0-5"/H2O max, we’d say. Measures 1-5/16" x 17/32" on a pair of 7/8" long 5/32" slotted mounting wings. The upper 3/16" OD barb is the low side, and the lower is (ironically) high. Has a 3-pin connector with legend on the back for power and output. Call for a data sheet.

Rated for 10A at 250VAC, these normally closed thermal fuses will pop at 128ºC or 262ºF. The fuses themselves are 1/2" long but yours will be wired into leads of assorted lengths, because they were betooken out of coffeemakers of some sort. Never been popped, though, because then they would be useless and who'd buy 'em?

With this 1.2K OHM 10% tolerance power resistor. Rated 3 to 5 watts, it has a ceramic block body 3/8" sq x 1-1/2" long with wire leads on ends, one of which is 1/2" long and the other 1-1/2". Any questions?

These black aluminum alloy heat sinks have flared fins at 1-3/8" x 1-1/2" x 1/2" with (2) pins out one short side and (3) 1/8" mounting holes in the center. Wethinks these are PCB mounts for TO series chips.

Our black anodized channel-style heat sink measures 1-1/4" x 1-1/2" x 7/16" with folded back fins and a pair of 1/8" mounting holes in the flat center. Come on, you've got some heat to sink. Who doesn't?

When parking becomes so expensive that meters take an ATM card instead of a quarter, all those coin-operated meters become surplus! Now you can own the mechanism from a used POM Inc. digital meter. Measures 7" tall x 5" wide x 3-7/16" thick, with a 1-13/16" x 11/16" LCD display window on the front and a motorized 3-color window on the back. Coin-box and mount not included. Requires a 9V battery (also not included) and has a reset to the left of the coin-slot. Preset for (12) minutes per quarter and if you can find a way to change it, let us know. Perfect for charging folks to park in your driveway, and just screaming to be included in a steampunk creation.

This chassis-mounted in-line EMI filter from Schaffner (model #FN2020-3-06) accepts up to 3A at 110/250VAC. Unit measures 1-3/4" x 1-5/16" x 1-3/16" with (2) 3/16" mounting holes on side wings. Has 1/4" quick-disconnect terminals and has a wiring diagram on the housing. UL/CSA.

From Honeywell (part #AWM730B5), this medical airflow sensor is a takeout with a range from -300 to +300 SI/min. With a 5V activating current, will give an output between 0.5 and 4.5V responding in <10ms. Pins 1-4 are +15VDC in, ground, 5V in, and output. Unit measures 1-7/8" long x 13/16" dia, mounted on a 1-1/8" x 1-3/4" bracket. We'll include a spec sheet. Made in the USA.

This 4" x 3-3/4" x 1-3/4" medical take-out air sensor has (3) ports coming off the main 3-1/8" x 3/4" ID chamber, (2) leading to one sensor and the other leading to a second one, then through circuitry on a mounted PC  board leading to a 10-pin output connector. Also has a PCB-mounted 3V coin cell battery. The sensors have input, output and trigger voltage and a voltage output, but we have no specs. Nice parts and pieces, though.