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Peltier Heat Pump
High tech comes to Am Sci & Surp!! It is here in the form of a Peltier junction, a thermo-electric device that translates electric power into heat, and perversely, into cool. Apply current @ 3-12 VDC to the gizmo and it extracts thermal energy from one face, thereby cooling it. The heat is dumped onto the other face, thereby heating it. Please note: you must use a heat sink on the hot side or the junction will fry itself, since it can quickly create a 65° C temperature differential in a no load situation. Stack two, or build a cascade to increase the thermal differential created. Or run it backwards. Apply heat or cold to the relevant face and produce a current. Amazing for science projects and experiments. Practical for coffee warmers, beer coolers and mini-refrigerator or warming oven applications. Comes with instructions. Large is 1-9/16" sq. x 3/16" thick.
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89143 LARGER PELTIER JUNCTION |
Thermal Sensor
Heat switch that is normally open below 135° F and closes at higher temperature. Imagination is the limit here. We don't have formal electrical ratings but believe it can handle about 2 Amps @ 120 VAC. It can be used (perhaps with a relay) to trigger a fire alarm when mounted near a furnace, in a garage, or in an attic. How about using it to shut off electronics or motors when overheating occurs? Or to activate a fan for cooling? Use it to record how long the furnace is on to rate its efficiency. 5/8" dia x 3/8" sensor head with (2) 1/4" x 1-5/8" long fixed leads.
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25813 HEAT SWITCH, 135DEG F |
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Hot Hot!!
This flash heating element out of a coffee maker really heats in a hurry!! It is designed only for use with a regulating heat switch (not included) and will melt itself in less than a minute if turned on un regulated with no water or other contents. It draws 8 amps @ 120 VAC max. 2" dia x 2-1/2" tall, OA. It holds about 1 oz. and has (2) spade terminals. A wonderful item when used correctly.
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32451 FLASH HEAT POT |
Thermocouple Probes
We have the perfect thermocouple probes to probe your every temperature! Surface, moving surface, air, insertion and general purpose probes, with appropriate temperature ranges, are durable, well-made tools that are built to last. The 9000 series probes are compatible with any meter that accepts a mini-connector plug, so you can use your favorite. The actual probes range from 4" to 7", except the Moving Surface Bow with Replacement Element, which has an 11" wand. They all have 5" comfort-grip handles. See the table below for the probe type, description, cable length and Fahrenheit temperature range of the tip. The Item number includes the manufacturer's model number. All are made by Alnor.
| Type | Description | ||||
|---|---|---|---|---|---|
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28644 PROBE, 9230 | J | Surface Probe | Details | |
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28647 PROBE, 9280 | J | Reduced Tip | Details | |
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28648 PROBE, 9290 | J | Surface Bow | Details | |
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28659 PROBE, 9440 | T | Angle Surface | Details | |
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28649 PROBE, 9710 | J | General Purpose | Details |
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